superyacht solar panels

672 Wine Club

• Motorcycles
• Car of the Month
• Destinations
• Men’s Fashion
• Watch Collector
• Art & Collectibles
• Vacation Homes
• Celebrity Homes
• New Construction
• Home Design
• Electronics
• Fine Dining
• Benchmark Wines
• Brian Fox Art
• Disneyland Resort
• Ka La’I Wakiki Beach
• Kalamazoo Grill
• Raffles Hotels & Resorts
• Tributary Idaho
• Sports & Leisure
• Health & Wellness
• Best of the Best
• The Ultimate Gift Guide

This New 427-Foot Superyacht Is Powered by 16,000 Square Feet of Solar Panels

Dubbed the solar express, the vessel was was penned by anthony glasson of design studio m51., rachel cormack.

Digital Editor

Rachel Cormack's Most Recent Stories

This new 454-foot gigayacht concept comes with a bonkers underwater lounge, meet gx superyachts, a new shipyard creating custom hybrids ranging from 78 to 164 feet.

• This New 111-Foot Hybrid Catamaran Is Topped With a Glass Hot Tub
• Share This Article

Sometimes a name can tell you everything you need to know about a superyacht . That’s certainly the case with Solar Express, at least.

The futuristic new concept, which was penned by Anthony Glasson of design studio M51 , was inspired by steam trains like the one featured in the 2004 film The Polar Express . It’s also covered from tip to tail with solar panels for cleaner cruising. Hence the punning moniker.

Related Stories

• I Learned How to Fly This Electric Aircraft in a Week—and I Didn’t Need a License
• Review: Can-Am’s First Motorcycles in Decades Are Electric. Here’s How They Rate.

Spanning an imposing 427 feet, the Solar Express sports a sleek, locomotive-like silhouette and a huge spike at the bow that Glasson says takes cues from a “narwhal tusk.” Looks aside, the vessel incorporates naval architecture that’s at the bleeding edge.

Glasson, who has spent a decade-plus working as an engineer on superyachts ranging all the way up to 295 feet, has centered the design on solar power. The foredeck, sundeck and stern are fitted with more than 16,000 square feet of solar panels. All the energy that’s harnessed from the sun is then stored in large batteries and used to power the yacht’s onboard amenities. It’s also used to power part of the hybrid propulsion system, which is comprised of twin Azipods and electric generators.

The superyacht sports two lavish VIP cabins that overlook the pool below.  M51 Concepts

To improve efficiency, the Solar Express is equipped with a lightweight aluminum hull. She also features lightweight luxury materials throughout. Less excess weight allows for a greater battery capacity, though the firm did not give any figures regarding speed or range.

With a volume of 5,260 GT, Solar Express has a relatively small interior for her class. She also has fewer glitzy amenities than some other superyachts of the same size. This was a necessary measure to ensure there was enough space for solar panels.

“The idea behind the concept was inspired from my many years working as a crew member on large superyachts and witnessing the huge energy consumption first hand,” Glasson told Robb Report via email. “Solar Express is an attempt (far from perfect) to reduce fuel usage over the service life of the yacht.”

Suffice it to say, Solar Express is still plenty luxurious. She is fitted with two lavish VIP cabins on the upper deck that offer panoramic views, along with a large 33-foot swimming pool and a hot tub. You can also expect a sizable swim platform and accompanying tender.

Now show us a steam train that has all of that.

Check out more photos below:

M51 Concepts

Rachel Cormack is a digital editor at Robb Report. She cut her teeth writing for HuffPost, Concrete Playground, and several other online publications in Australia, before moving to New York at the…

Read More On:

• Electric Yacht

More Marine

Four Seasons Yachts Wants to Take You to the Caribbean for the Holidays

How Don Johnson Channeled His Love for the Water Into a New TV Series

Meet the Wine Club That Thinks Differently.

Receive editor-curated reds from boutique California producers four times a year.

Give the Gift of Luxury

Latest Galleries in Marine

Inspire Superyacht Concept in Photos

The GX Superyachts Range in Photos

More from our brands, 21 of the world’s most expensive handbags: birkins that bling, chanel’s crocodile skin flap bag and more brands with the power of the purse, more payroll, more fans but playoffs in doubt for d-backs, sharjah film festival heads on inaugural film market, plans for film fund dedicated to filmmaking for children and youth, christie’s first 21st century day sale at new hong kong hq sees middling results, the best yoga mats for any practice, according to instructors.

Silent Yachts

Creators of the world’s first series produced, solar-powered electric yachts.

Unlimited Range

Noiseless cruising, zero emission, minimal maintenance, pioneering solar powered yachting since 2009.

The Original Solar Yacht

As the original inventors of series produced solar-electric yachts, we pioneered this innovative approach. Our first model, the Silent 64, was launched to the market in 2016, several years before any other shipyard considered the possibility of going electric.

Leading Technology

Our founders began to research alternative energy sources to power yachts during the mid 1990s. Today, the technology of our in-house developed solar-electric drivetrain has been perfected and is multiple generations ahead in terms of reliability, performance and efficiency.

Historical Track-Record

In 2009, the Solarwave 46 was launched as our first prototype of a fully solar-electric, self-sufficient ocean-going catamaran. Since then, our electric yachts have cruised many 10.000s of nautical miles, performing flawlessly during a variety of weather conditions.

Enabling Self-Sufficiency

What differentiates a Silent is the unprecedented level of autonomy provided by our yachts. Being able to produce your own energy enables a fully self-sufficient lifestyle on board. Travel the oceans sustainably while making them your infinite playground.

The award-winning entry to solar-electric yachts.

Timeless design meets state-of-the-art technology.

120 Explorer

The boldest expression of solar powered yachting yet.

What Makes Us Unique

The tranquility on board of our yachts is unique. A lack of noise, fumes and vibrations create a deep connection with the sea. Luxury and sustainability finally merged into a holistic experience, working hand in hand with nature by minimizing the impact on the marine environment without compromising comfort.

For optimal performance and efficiency, our solar-electric drivetrain integrates seamlessly with all onboard systems. Compared to fossil fuelled powertrains of motoryachts, electric powertrains have very few moving parts, resulting in minimal maintenance, maximum reliability and significantly lower running costs.

The ability to recharge your own batteries with the sun marks a new era of freedom. Depending on cruising speeds and weather conditions, a Silent has virtually unlimited range, enabling you to live a fully self-sufficient lifestyle on board. Unbound by the limitations of fossil fuels, you are free to explore the horizons.

The technology powering our yachts today has been pioneered by our founders almost three decades ago. Continuous upgrading and steady optimization of the entire system are some of the key reasons our in-house developed solar-electric drivetrain offers a comprehensive portfolio of assurances and warranties.

Why Silent Yachts

A sensible approach to yachting which works in self-sufficient harmony with nature and creates a completely new experience on board.

Tech Corner

Living on a Silent 62 Solar Electric yacht

Silent Yachts’ range is designed to harness the power of the sun, providing green energy and silent cruising. But what can owners truly expect? How much power does the Silent 62 use while cruising? In this article, we evaluate a typical day onboard the Silent 62, based on actual data from our yachts.

Why a Solar Powered Yacht?

Let’s break down the advantages of harnessing the sun’s energy for yacht propulsion: solar power offers remarkable efficiency, significant environmental benefits, and an unmatched synergy with the yachting experience. Join us as we dive into the future of sustainable yachting and discover how solar-powered yachts are revolutionizing the seas.

Silent Yachts wins “Best Efficient Yacht” at the Cannes Yachting Festival 2024

Silent Yachts’ shining debut at the Venice Boat Show 2024

Silent-Yachts emerges stronger under new ownership

New Silent Drivetrain

Tech shorts 2023

Electric power event on the water

“The Tesla of the seas! An amazing founding couple, a highly innovative product as well as a really cool story behind it. Furthermore, a lot of love and attention has been invested into every single detail – truly impressive!” Frank Thelen / TV Personality, Founder, Angel Investor & Disruption Expert

While the present has brought us the dawn of smart cars, I strongly believe the future will bring us solar powered smart boats – and I definitely want to be at the frontline of that journey. Michael Jost / Former Head of Group Strategy of Volkswagen Group

The idea of sailing while charging your own battery is super powerful to me – solar powered sailing is the perfect love story! Jochen Rudat / Former Tesla Central Europa Director, Advisory Board Silent Group

Elon Musk single handedly forced an entire industry to go electric, as a matter of fact if they don’t all go electric now they will soon die. I would like to see the same thing happening for boating. You are not just selling boats – you are the actual leading edge of a crucial and much overdue revolution to sustainable transport!” Klaus Obermeyer / Emmy Award Winner

I am completely excited about solar catamarans. I knew before they are great but now I truly believe this is the future. After so many boats I’ve seen in over 18 years with Boote Exclusiv, this yacht truly blew my mind. Such a silent and peaceful cruising experience – just the way it should be. Martin Hager / Editor in Chief for Boote Exclusiv - Yachts

The global authority in superyachting

• NEWSLETTERS
• Yachts Home
• The Superyacht Directory
• Yacht Reports
• Brokerage News
• The largest yachts in the world
• The Register
• Yacht Advice
• Yacht Design
• 12m to 24m yachts
• Monaco Yacht Show
• Builder Directory
• Designer Directory
• Interior Design Directory
• Naval Architect Directory
• Yachts for sale home
• Motor yachts
• Sailing yachts
• Explorer yachts
• Classic yachts
• Sale Broker Directory
• Charter Home
• Yachts for Charter
• Charter Destinations
• Charter Broker Directory
• Destinations Home
• Mediterranean
• South Pacific
• Rest of the World
• Boat Life Home
• Owners' Experiences
• Conservation and Philanthropy
• Interiors Suppliers
• Owners' Club
• Captains' Club
• BOAT Showcase
• Boat Presents
• Events Home
• World Superyacht Awards
• Superyacht Design Festival
• Design and Innovation Awards
• Young Designer of the Year Award
• Artistry and Craft Awards
• Explorer Yachts Summit
• Ocean Talks
• The Ocean Awards
• BOAT Connect
• Between the bays
• Golf Invitational
• BOATPro Home
• Superyacht Insight
• Global Order Book
• Premium Content
• Product Features
• Testimonials
• Pricing Plan
• Tenders & Equipment

Solar Express: The 130m concept with 1,500sqm of solar panels

Related articles.

Design studio M51 has unveiled a 130 metre superyacht concept that is covered in over 1,500 square metres of solar panels.

Aptly named Solar Express, the concept’s exterior is characterised by the huge “narwhal-tusk” inspired spike at its bow.

Anthony Glasson, the designer behind the concept, said: “Taking inspiration from steam trains, Solar Express is an attempt at a greener future for large superyachts.”

The concept’s foredeck, sundeck and stern are covered in solar panels which combine with storage batteries and generators to power the yacht’s onboard electrical systems.

Solar Express’s lightweight aluminium hull, combined with lightweight materials throughout the vessel, reduce the weight and allow for greater battery capacity. A hybrid propulsion system comprising twin Azipods and electric generators also helps keep emissions down.

According to Glasson, the concept’s 5,260GT is a relatively small volume for a 130 metre yacht, resulting in more room for solar panels and smaller interior areas to keep air-conditioned.

In order to pen the eco-focused concept, Glasson admits some sacrifices were made during the design process. “This concept is for the owner who does not mind forgoing some typical large superyacht features such as helipads or sundecks to make way for solar panelling.”

Solar Express nonetheless still offers a range of typical luxury yacht amenities including a 10 metre long swimming pool, a hot tub and al fresco dining on the main deck.

Accommodation is found on the upper deck, with two VIP cabins overlooking the aft deck and provided with expansive ocean views.

Sign up to BOAT Briefing email

Latest news, brokerage headlines and yacht exclusives, every weekday

By signing up for BOAT newsletters, you agree to our Terms of Use and our Privacy Policy .

More stories

Most popular, from our partners, sponsored listings.

America's Most Trusted Solar Marketplace

Please enter a valid zip code.

• Why Solar.com?
• Solar Calculator
• How It Works
• Learn About Solar
• Installer Reviews
• No menu assigned!

Solar Learning Center

--> Solar Pros & Cons

• Lower Electric Bill
• Increase Your Home Property Value
• Gain Energy Independence
• How Solar Benefits the Environment
• Disadvantages of Solar Energy
• Solar Panel Scams
• Time-of-Use Rates (TOU)

--> Solar Panels for Home

• Best Solar Panels
• How Do Solar Panels Work?
• Solar Panel Efficiency
• Solar Inverters

Solar Providers Near Me

• Solar Panel Installation
• Charging an EV with Solar Panels

Community Solar

Solar for condo owners, key solar terms, --> solar panel cost.

• Solar Cost Calculator
• How Much Do Solar Panels Save?
• Solar Panel Installation Cost
• Solar Panel Costs by State
• Solar Cost Per Watt
• Solar Panel Maintenance Requirements

--> Solar Financing

• Buy Solar Panels
• Solar Loans
• Solar Lease
• Power Purchase Agreement

--> Solar Rebates & Incentives

• Federal Solar Tax Credit
• Solar Incentives by State
• What are Solar SRECs?
• Inflation Reduction Act of 2022
• ITC Step Down: Effects on Solar Installation

--> Solar Battery

• How Do Solar Batteries Work?
• Solar Battery Price
• Battery Backup vs Generator
• Enphase Battery
• FranklinWH Battery
• Tesla Powerwall
• LG Batteries
• Off Grid Solar System

--> Solar FAQs

• General Solar.com Questions
• Project Financing
• Creating a Solar.com Account
• Solar.com Bidding Process
• Solar.com Installers

See how much solar panels cost in your area

Zero upfront cost, best price guaranteed.

Solar Learning Center > Solar Panels for Home > Solar Panel Installation Process > Solar Panels For Boats and Yachts Solar Learning Center > Solar Panels for Home > Solar Panel Installation Process > Solar Panels For Boats and Yachts -->

Solar Panels For Boats and Yachts

By Michael Olenick | Jul 26, 2022

The purchase of a boat or a yacht is a coveted purchase for many people. While it certainly adds a new dynamic to one’s life, it’s not the most straightforward investment since maintenance is a huge component of owning a sea vessel. Other than the physical maintenance of your boat, fuel management and maintenance is often a logistical nightmare for many boat owners. Some of these problems include keeping batteries topped off; doing it quietly, as not to bother the surrounding communities; and refueling costs. An easy solution to these problems: solar panels.

Sizing a Solar System for Your Boat or Yacht

• Refrigerator(s)
• Radar & sonar units

When adding up your energy consumption, always round up and add about 10-15% extra Watt-hours to your total, as certain appliances tend to use up more energy during spring and summer months. Once you reach the conclusion that you are ready for a further discussion, you can always reach out to a solar panel expert to get solar quotes, help with your energy calculations, and aid in determining the right number of panels you would need to offset your yacht or boat’s energy usage. Obviously, the number of panels you would need depends on energy usage and vessel size, but solar is a much better option than common fossil fuels when powering your boat.

The Benefits of Adding Solar Panels To a Boat or Yacht

When it comes to adding solar panels to your boat, the benefits are endless. Here are just a few for you to consider:

• Silence: Noisy refueling at docks and extremely loud on-board generators are a thing of the past. Cruise the seas in with zero mechanical noises, and enjoy the natural ocean sounds.
• Minimal Maintenance: The only maintenance solar panels require is a simple rinse off every couple of months, as salt can build up when the seawater evaporates.

• Travel Lightly: With your new panels, you won’t have to lug heavy containers of fuel with you on your trips. More room for wine or martini mix.
• Unlimited Energy: Aside from the occasional cloud in the sky, you will have full access to the sun on the open seas.

Besides the affordability and convenience, solar panels could inevitably save your life. You will never have to worry about running out of fuel when you are out on the water. This will help you avoid any potential emergencies or disasters.

Solar Panel Placement

This is where most caution needs to be taken. When choosing where you are going to place your solar panels on your yacht or boat, you need to take two big things into consideration: shading and security.

When it comes to shading, you want to make sure you place your panels in an area that receives the most sunlight. Having your boom shade some of the panels, or any lines can reduce your energy production. The wiring of solar panels can also be delicate. That is why you need to place your solar system in the most secure spot possible – rough seas or choppy waters could lead to a wire shaking loose.

If you’re longing to make a maintenance upgrade to your nautical vessel, a solar system should be seriously considered. Not only will it reduce noise, weight, and fueling costs, but it will differentiate your boat from all the other vessels at your next port.

Whether you have questions about panel placement, efficiency, or just if your boat is right for solar, please click here to speak to an expert!

Solar Panel Installation Process

More related articles.

Solar Panels on a Flat Roof: 5 Things to Know

Can you install solar panels on a flat roof? Yes, you can successfully install solar panels on the flat roof of your home or business....

How Many Solar Panels Do I Need To Power a House?

One of the first questions homeowners ask when going solar is “How many solar panels do I need to power my home?” The goal for...

What Is the Best Roof Design for Solar Panels and What If...

If you’re looking to go solar at home, chances are you’re going to put those panels up on your roof. Ground-mounted solar is a great...

The Best Roof Materials for Solar Panels - 5 Common Materials

One of the first questions you’ll be asked in the process of going solar is, “What is your roof made of?” Solar can be installed...

How Long Do Solar Panels Last on a House?

Like buying a house, solar panels are a long-term investment. The longer you own them, the greater the return on investment. In fact, if you...

Meet the Energy Companies Topping the Inc. 5000

Last month, the annual Inc. 5000 list was published on Inc.com. The list ranks businesses based on their revenue growth from 2013 to 2016, and...

The Value of Custom Designed Solar Systems

When customers come to us from other installers, they are always hesitant and anxious. Why? Because when you go straight to the installer they give...

3 Questions To Ask Before You Go Solar

  Most solar installation companies provide financial projections to homeowners estimating what their savings will be twenty or twenty-five years after the time of installation....

The Influence of Women in the Solar Industry

It’s International Women’s Day! Today we recognize and celebrate women all around the world. As a member of Solar.com’s female population, it’s necessary for me...

Who Are The Best Solar Panel Manufacturers?

  You are a savvy consumer who wants to make sure you find the best solar panels for your home. In a lot of instances,...

2021's Top Solar Monitoring Systems

Household solar monitoring systems change the abstracts of power generation and consumption into graphics and numbers you can scroll through on an app. Hardware connected...

2021's Best Home Solar Mounting Systems

Solar panels and backup batteries get all the attention. But there’s another important piece of equipment to the home solar equation: mounting systems. These sturdy...

How To Choose The Best Solar Panels in 2023

Solar panels last a very long time and technology is always improving.  How do you decide which panel is the right fit for you?  Should...

Our Solar COVID-19 Guidelines

Solar.com is committed to providing our customers with the best customer service experience in the solar industry. In light of the ongoing developments around the...

U.S. Installed Solar Capacity: 2 Million Milestone

According to the most recent data released by Wood Mackenzie Power & Renewables and the Solar Energy Industries Association (SEIA), the residential solar market in...

Solar Subcontractors: Should I use one to go solar?

  So, you’re interested in starting a solar project and now you’re wondering, “who should be doing the installation work?” Well, more and more companies...

5 Most Popular Solar Panels Chosen by Homeowners in 2018

  Homeowners demand a lot from the solar panels they select for their rooftop system. These panels need to look good and perform well over multiple decades! Here...

Better Looking Solar Panels: System Aesthetics Comparison

  As a homeowner, solar panel efficiency and cost may not be the only two factors you’re considering when deciding whether or not to go...

Brooklyn Solar Works Solar Canopy: The Comprehensive Review

As everyone knows, space is tough to come by in New York City. The same holds true when designing rooftop solar arrays. The city is...

8 Awesome New Technologies from Solar Power International 2018

  Today, the Solar.com team took a break from our solar designs for a quick trip down to Anaheim for Solar Power International 2018. We...

The Essentials of Passive Solar Home Design

In the process of designing a home, there are a number of strategies that can be implemented to minimize the amount of energy required to...

South Korea's Q CELLS to Open Georgia Solar Factory

In the wake of US tariffs on non-domestic solar modules, Q CELLS is opening a solar module factory in Georgia. The South Korean company announced...

What Direction Should My Solar Panels Face?

When you make the decision to install a solar panel system at your home, there are going to be several questions on your mind. How...

India Gets Serious About Solar

According to Indian Prime Minister Narendra Modi, India is on track to install 200 gigawatts of renewable capacity by 2020. The country is fully embracing...

Can My Solar Panels Withstand a Hurricane?

  If you live in an area that experiences extreme weather like hurricanes, hail, thunderstorms, blizzards, heavy winds and more, then you should take the...

Why Are Solar Panels Blue?

If you have ever driven through a residential neighborhood in states like California, Arizona, North Carolina, or any of the other top states for solar,...

What Solar Options Are There Besides Rooftop Solar?

When you think of solar, you probably imagine a solar panel-lined rooftop. For many homeowners, rooftop solar is usually the way to go. But it...

Brand Battle: Hyundai vs. Panasonic Solar Panels

Hyundai and Panasonic are trusted brands and they’ve both expanded into the solar panel industry. Offering quality products for two different price points, each brand...

Why New York Loves SunPower Solar Panels

New York loves its Yankees — and its Sunpower solar panels. A recent review of the Solar.com platform showed that homeowners in New York state...

Should I Get a Solar Thermal System Instead of a PV System?

When you hear about installing solar, you’re most likely hearing about PV (photovoltaic) solar cell panels. They’ve become standard in the industry. PV solar cell...

How to Conduct Due Diligence on Your Solar Project

Once you’ve decided to install a solar panel system at your home, the next thing to focus on is conducting the proper due diligence on...

How Utility API Works With Your Utility and Solar Company

Utility API provides software to accelerate the clean energy movement. They do this, in part, by offering secure data on a homeowner’s energy usage to...

What's the Size of a Solar Panel? Solar Panel Size and Weight...

  If you are thinking about installing a solar panel system at your home, one of the first things you must consider is how much...

American Solar Panel Manufacturers - 2018 Complete List

There are many reasons why a consumer may want to purchase their solar panels from an American manufacturer or from American Solar brands. They want...

A Guide to Solar Panel Mounts

Solar panel mounts are a common component of almost every solar panel array. Although there are newer solar panel technologies coming out that do not...

Top 5 Solar Panels Selected Through Solar.com in 2017

  Curious which solar panels are selected most on the Solar.com platform? As an online marketplace connecting quality solar companies to customers, we stay neutral...

SunPower Solar Panels vs. LG Solar Panels - 2018 Update

SunPower and LG are two of the top companies making solar panels. You’ve probably come across them in your research, and you’re wondering which will...

How Blockchain And Solar Can Work Together

Many would consider 2017 to be the year of cryptocurrency. Coins like Bitcoin, Litecoin, Ripple and dozens of others have shot up 1,000%+ and do...

The Craziest Solar Technologies Coming in 2018

Solar technology has been in existence since 1876 when William Grylls Adams and his student researcher discovered that you can produce electricity by exposing selenium to...

3 Solar Panel Innovations to Look for in 2018

Solar energy is taking shape across industries and geographies. Engineers at top solar panel companies are hard at work developing innovations making solar even more...

6 of the Most Common Solar FAQs

Solar is now more affordable and practical for the consumer than ever before, and because of this, it is starting to make sense to think...

An Overview of Panasonic's Solar Panel Offerings

With all of the advances in the solar industry, it is getting more practical and affordable to start using solar. In fact, the price of...

5 Reasons to Consider a Career in the Solar Industry

Solar energy, unfortunately, is still viewed as an alternate power source. However, in spite of this designation, it is quickly becoming the primary source of...

Installing Solar in Nepal

Working in the energy sector in America can be fast paced. It is primarily focused on reducing homeowners energy bills. Cost is king. My days...

How To Properly Evaluate Solar Panel Companies

  There are so many details to take into account when choosing the right solar system for you. One of the most important factors is,...

Installing Solar On Spanish Tile Roofs

Spanish tile refers to the style of the tile, not the material. Spanish tile is usually made of either clay or concrete. Installing a solar...

Invisible Solar Cells - What Are They?

We have come a very long way from the first line of solar panels. Despite their sustainability, the first solar panels were not the most...

Amazon Has Finally Decided To Become A Leader in Renewable Energy

Back in 2015, Greenpeace did a sophisticated research project on the sustainability of the top tech giants in the United States. It covered many areas of sustainability,...

Solar Backup Power - Will My Solar Panels Work in a Grid...

Solar photovoltaic panels are created to absorb the sun’s energy and convert it to usable AC energy in your home. You may be wondering then,...

A Review of LG Solar Panels - When Brand Name Does Matter

LG is a brand you may already be familiar with. They are a South Korean multinational manufacturer that makes televisions, mobile devices, tablets, smartwatches and...

Will Tesla's Solar Panels Change The Industry?

On October 28, 2016, Elon Musk unveiled Tesla’s solar roof product – a line of roof tiles and shingles with embedded photovoltaic cells. To an...

Electrical Panel Upgrades for Solar: A Technical Case Study

John Smith is a homeowner in California looking to reduce his electric bill by going solar and he decided to call an installation company that...

SunPower Solar Panels vs. LG Solar Panels

If you are considering installing a solar system at your home or place of business, then you have many factors to consider. The paramount factor...

Is SunPower Still The Best Solar Company For Solar Panels?

You’ve heard of SunPower, LG, SolarWorld, Q CELLS, and maybe even Canadian Solar, but which one is the right fit for your home? To figure...

What Trump's Presidency Means for the Solar Industry

The election of Donald Trump to the office of President of the United States is expected to have a profound impact on the future of...

Importance of Power Tolerance in Solar Panels

This paper highlights the importance of power tolerance when choosing solar panels. Power tolerance is a measure of how much electrical power a solar panel...

Gauging the Bankability of Small to Mid-Sized Solar Installers

The entire world is going green and moving toward cleaner sources of energy. California hosts a flourishing solar industry with a burgeoning number of solar...

Ann Arbor Takes Steps to Promote Residential Solar

Home to Michigan’s largest solar panel array of 1.1 MW and one of the top green research universities in the country, Ann Arbor has a...

Measuring Home Energy Use

One of the most important steps before installing home solar is figuring out how much energy your home uses, and how big your solar energy...

Three Things to Avoid When Installing Your Solar Panel System

At Solar.com, we have a lot of experience in the solar panel industry. Every day we help people to install panels on their homes, and...

The Benefits of Floating Solar Panels

  Floating solar panels utilize the same technology as the panels that you put on your roof. The main difference is that they’ve been adapted...

The Top Three Solar Manufacturers

At Solar.com, we believe in supplying quality equipment for our customers. In the last twenty years, solar technology has grown exponentially, costs have plummeted, and...

Elon Musk's Gigafactory Should Be Dictating Your Solar Equipment

All solar installations today should be thinking ahead to the not-so-distant future. The main question to be asking is whether your solar system will seamlessly...

The Solar “Tipping Point” is Looming

We all know why people go solar: investment purposes, immediate savings, environmental concerns, and grid independence. But who are these people? One of Malcom Gladwell’s...

4 Mistakes Homeowners Make When Going Solar

  Buying a solar system for your home can be a confusing process. At Solar.com we’re committed to helping homeowners sort through it all and...

Solar Installation Horror Story

The following letter is from a very reputable company in Solar.com’s installer network to a homeowner who was unfortunately taken advantage of by an installer...

Bankability: What it Means and Why it is Important for Your Solar...

Homeowners who are considering solar typically overlook the manufacturer of their solar panels, despite this being one of the most important factors for the longevity...

How ‘Big Data’ Will Change The Solar Industry

The U.S. Department of Energy invests in new technology to revolutionize the landscape of solar data. Reliable solar grid data, the true performance of solar...

Los Angeles Solar Installation Permit Process About to Get Easier

  Here at Solar.com, we want to see solar panels on every compatible rooftop in the U.S. And while our plans for expansion are ambitious,...

See how much solar panels cost in your area.

Zero Upfront Cost. Best Price Guaranteed.

How To Find the Best Solar Panels for Your Home in 2024

Trying to determine the best solar panels for your home is like trying to determine the best car – there’s no one correct answer. Everybody...

How Does Solar Power Work on a House? Your Questions Answered

How does solar power work? A simple explanation is that solar panels convert sunlight into electricity that can be used immediately or stored in batteries....

Solar Panel Efficiency - Pick the Most Efficient Solar Panels

You may hear the term “efficiency” thrown around a lot when reading up on solar panels. It sure sounds like a good thing, but what...

Solar Inverters: Types, Pros and Cons

What is a solar inverter? Solar energy doesn’t provide electricity in a format that your table lamp could be powered by. Inverters change the power...

When beginning your home solar project, you might start by searching “Solar Providers Near Me.” Then, you'll be presented with dozens of different solar companies...

Charging Your EV With Solar Panels and Using the EV Tax Credit To Lower the Cost

Ditching your gas-guzzler for an electric vehicle (EV) is a great way to lower the cost and emissions of getting from A to B. But...

It’s no secret that many of us spend a large portion of our income on energy and electricity bills. In fact, in 2012 we spent...

Solar for condominium unit owners is gaining steady popularity throughout the country, as more and more states are writing legislation to promote clean energy accessibility....

Going solar isn't something people do everyday and unless you have an electrical engineering degree, it's likely you'll bump into some new phrases and terms....

Join our free newsletter to learn more about going solar

• Multihull Sailor
• Real Estate
• Maintenance & Hardware
• Water Sports

The Best Solar Panels for Boats for Eco-Friendly Energy

Solar energy is the most abundant renewable energy source. Harnessing the sun's power is a reliable and eco-friendly way to power your boat and get where you want to go. It’s also a great backup energy source during an emergency. You can save money and reduce pollution—it's a win-win!

Solar panels are a great way to give your boat energy and power. The Renogy Solar Panels for Boats (our favorite) has panels that are compact, reliable, and built to last with corrosion-resistant aluminum frames and low-iron-tempered glass. Keep reading and learn which solar panel is right for your boat!

Our Top Picks For Solar Panels for Boats

• Best Overall: Renogy Solar Panels for Boats Shop Now ➔
• Largest Panels: Rophie Solar Panels for Boats Shop Now ➔
• Most Durable: TopSolar Solar Panels for Boats Shop Now ➔
• Most Lightweight: ECO-WORTHY Solar Panels for Boats Shop Now ➔
• Easiest Installation: Sunway Solar Panels for Boats Shop Now ➔
• Most Surface Area: EF ECOFLOW Solar Panels for Boats Shop Now ➔
• 1 What to Consider When Buying Solar Panels? 
• 4 Accessories 
• 5 How Do Solar Panels for Boats Work? 
• 6 Installation
• 7 What Are Care Requirements to Enhance the Life of Solar Panels for Boats? 
• 9 Cleaning 
• 10 What Are the Properties of Charge Controllers for Solar Panels for Boats? 
• 11 Basic charge controllers 
• 12 Mid-range charge controllers
• 13 Max power charge controllers 
• 14 Conclusion 

Can solar panels for boats run a trolling boat motor?

How long does it take for a solar panel to charge your boat’s battery, why do people consider installing solar panels for boats, related articles, the best solar panels for boats, best overall.

Renogy Solar Panels for Boats

The Renogy are 100W monocrystalline solar panels providing an average of 400-500Wh or 33-41Ah of electricity per day, so you have reliable performance. It has bypass diodes that protect the solar cells from overheating, so you don’t have to worry about maintenance. In addition, it features a corrosion-resistant aluminum train providing extended outdoor use without any extra damage.

These solar panels come with pre-drilled holes on the back so that you can install and mount them without spending money on professional help. They measure 42.2 x 19.6 x 1.38 inches and weigh 14.3 pounds, making them lightweight and convenient. Moreover, you can install them on boats, rooftops, cabins, and more for multifunctional use. Because of their efficiency and reliability, these solar panels stand at the top of our list.

• They are weather-resistant 
• These solar panels maintain cell temperature 
• Provide reliable performance
• Only compatible with Renogy ground mounts and brackets

Largest Panels

Rophie Solar Panels for Boats

The Rophie Solar Panels easily stands out on this list. Designed with impeccable efficiency, they accelerate solar charging to the next level, making it ideal for outdoor enthusiasts and off-grid boat owners. These solar panels convert sunlight into power rapidly, while their ultra-light, foldable design ensures convenience during transport and installation. Don’t let their light weight fool you, though, as they pack an impressive 200 watts, delivering unmatched power performance for your boat or outdoor camping.

These panels don’t just excel in efficiency and power; they’re also built to endure. Their IP67 waterproof grading ensures that they remain operational even under challenging weather conditions. Their high-quality MC-4 connectors further optimize power transfer while ensuring safe and secure connections. Plus, their compact design won’t take up much space, proving to be the optimal choice for boat owners who value both power and convenience.

• Lightweight and easily transportable
• Durable and water-resistant
• High-performance with 200W
• Can be a little pricey

Most Durable

TopSolar Solar Panels for Boats

The TopSolar Solar Panels are available in a kit containing 20W solar panels, a solar charger regulator of 12V/24V, two 6.5-foot cables with alligator clips, and an O-ring terminal to have a complete experience while on the go. They are perfect for off-grid 12-volt battery charging systems providing you with various DC applications like cabins, boats, battery-operated gates, and more. They come with a 10A solar charger controller preventing the battery from overcharging, discharging, and risk of short circuit for a safe experience. 

These solar panels have aluminum and tempered glass frames, ensuring a durable and weather-resistant use. Weighing 2.75 pounds and measuring 2.32 x 13.86 x 17.13 inches, they are compact and portable. 

• Easy to store and carry 
• They come in a complete kit 
• Provide excellent weather resistance
• Not suitable for large areas and machinery

Most Lightweight

ECO-WORTHY Solar Panels for Boats

The Eco-Worthy Solar Panels are 10W 12V solar car battery chargers that can be used to recharge boats, motorcycles, boats, snowmobiles, and tractors. They feature a cigarette plug option supplying you with constant power when needed. This kit includes a cigarette lighter adapter, one pair of battery clips, and four-piece PVC suckers ensuring maximum results in no time. 

They also have energy-saving, built-in blocking diodes that prevent reverse discharge from maintaining and extending battery life for maximum durability. It measures 1.4 x 9.6 x 15.3 inches and weighs only 1.5 pounds, so you have a compact product at hand

• They are available in a complete kit 
• These panels are lightweight and compact 
• They can recharge different types of vehicles
• Longer charging times

Easiest Installation

Sunway Solar Panels for Boats

The Sunway Solar Panels are battery charger panel mounts that require a simple installation on any windshield or dash, giving you a quick and convenient experience. They come with 12-volt batteries and a maintainer that protect your panels from overheating and discharging, ensuring safe and convenient use. In addition, these panels are equipped with ultra-clear PC glass, so you have a strong and durable product. 

They contain built-in blocking diodes that prevent reverse charging allowing your battery to maintain its useful life. Moreover, they also come with a blinking LED charge indicator that lets you know when the job is done.

• Comes with a battery maintainer
• Do not require professional installation 
• Comes with charging indicators
• Suitable to recharge small batteries only

Most Surface Area

EF ECOFLOW Solar Panels for Boats

The EF Ecoflow provides 160W foldable solar panels are designed to produce maximum power at any time of the day when paired with an EcoFlow power station, so you never run out of electricity. Moreover, they have a seamless one-piece waterproof design, so you can use them during outdoor activities like camping and hiking. 

These solar panels are also equipped with protection during transportation, enabling you to carry them without any concerns. Each pack comes with an Ecoflow 160W solar panel, kickstand case, user manual, and warranty card, so you don’t have to make any additional purchases. 

• They can be folded for easy storage 
• Comes in a complete kit
• Suitable for different outdoor activities
• Can only be paired with an Ecoflow power station

The Best Solar Panels for Boats Buying Guide

What to consider when buying solar panels .

Since solar panels are an expensive addition to your asset list, here are a couple of essentials to remember when purchasing. 

The size of panels is directly related to the size of your boat. You must get something to match the energy requirements of your boat or greater. A solar panel too small might not power it and leave you frustrated. Other than this, smaller products have less battery time which means they will turn off much quicker than something explicitly designed for the size of your boat. 

From PVC to glass covering and fully flexible panels, the type you choose determines their cost. This helps you establish your budget according to your needs. A glass-fronted solar panel is among the most budget-friendly options, but they are not as weather resistant. Besides this, a polycarbonate version is more expensive, but they are incredibly weather resistant and have a longer life. 

Accessories 

A charge controller or maintainer is an essential component available for your boat’s solar panels. This product protects your panels from battery damage. They prevent any risk of overheating, battery discharge, or sudden drops. A charge controller is essential if you want to elongate the battery’s life. Most brands also offer mount brackets, so you don’t have to purchase them separately. 

How Do Solar Panels for Boats Work? 

Solar panels for boats work just like any other portable energy provider. To install it successfully, you must have four components: the solar panel itself, charge controller, inverter, and battery. When solar panels in the boat hit sunlight, they convert it into the electrical current, supplying your boat with the required energy. 

Boat solar panels can work without a charger maintainer (controller), but there is a risk of overcharging your device. Therefore, you must keep it in place to avoid any risk of battery damage. 

The need for an inverter depends on the number of appliances that need a charge. For instance, if you wish to charge multiple devices other than the boat, consider buying a large-capacity product. 

You can opt for professional installation if offered by the brand or any other reputed company. But individuals who have the basics can do it all by themselves. However, you must make sure that all the relevant accessories are available at your convenience. 

Installation

The installation method is divided into three main stages. The first stage is to conduct an energy assessment. In this, you will determine the level of energy that your boat needs to function. Buy a panel that has a higher voltage than your requirements. This gives more room and flexibility to charge other devices. 

Check whether the solar panel can produce that level of energy. Once the capacity is determined, you can decide the exterior of your panels. In most cases, you choose between glass-fronted, polycarbonate, and fully flexible panels. 

What Are Care Requirements to Enhance the Life of Solar Panels for Boats? 

Caring for solar panels is essential as they are a long-term investment and should last accordingly.

Most solar panels are designed to last two to three decades. Caring for them is fairly simple but requires regular attention. All you have to do is keep them clean from dirt, leaves, and other obstructions. Solar panels from reputable brands always come with a warranty for a couple of years. 

Always get a professional repair from the brand in case of any damage. Even if your warranty has expired, we recommend taking your boat’s solar panels to a professional. They might cost a bit more than a local mechanic, but your panels get the treatment they require. 

Another factor to consider here is the useful life of your solar panel. This indicates that they will not be as effective as they age. The depreciation in their quality is slow and gradual. 

If your product has met the end of its useful life, it won’t stop working but will get more prone to damage. So instead of getting frustrated with why your solar panel for boats isn’t working properly, consider getting a replacement from the same brand or changing your product. 

To clean a solar panel, use lukewarm water with a mild, non-acidic detergent and apply water pressure to remove any visible dirt and debris. Panels for boats are relatively smaller, so you won’t need a lot of supply. Clean any unwanted spots with a damp cloth and leave it to dry. Avoid applying water pressure on smaller models as they might not sustain the burden.

What Are the Properties of Charge Controllers for Solar Panels for Boats? 

Charge controllers are an essential component. They help protect your panels’ battery from damage. There are three main types of charge controllers available. 

Basic charge controllers 

They use pulse width modulation to encode transmission information allowing control of the power supplied to boats or other devices. These are simple chargers that come in at an affordable price range. A primary charge controller is designed to control batteries of smaller solar panels. They might not deliver desirable results if connected with a high-capacity panel. 

Mid-range charge controllers

These controllers also use pulse width modulation but feature an LCD display to indicate current charging levels. This helps the user keep track of the system and unplug the device when it’s ready to use. 

Max power charge controllers 

Designed for high-end and powerful solar panels, they are one of the most expensive charge controllers. You should only attach them to devices recommended by the brand itself. They also maximize the performance of panels. 

Conclusion 

Solar panels are a great way to maximize energy efficiency in your boat and create a durable backup. They are available in different sizes and capacities, so you can find a suitable fit for your boat. This article carefully reviewed the most in-demand solar panels for boats in 2024 that can make a difference in your overall experience. Besides the panel, you should also grab a top-notch charge controller that protects the device from damage and enhances its life.

People Also Asked

Yes, you can run a trolling motor with solar panels, but it is essential to opt for a device that has suitable capacity.

If the panel is according to the desired capacity of the boat, it might take 4 to 6 hours for a full charge.

Solar panels reduce carbon emissions and save money by reducing fuel costs. They also reduce the noise levels caused by a fuel-ignited engine.

Article Contributors

Sail magazine review team.

SAIL Magazine Review Team reports on best-selling products in sailing and boating. SAIL Magazine is reader-supported: When you buy through links on our site, we may earn an affiliate commission. Artificial Intelligence (large language models) may have been used in the research and creation of the content.

To ensure questions about product testing or a specific article are addressed, please contact [email protected]

• Green Propulsion
• Renewable Energy
• Energy efficiency
• Sustainable materials
• Eco Insights
• News & Events
• Sunreef News Magazine
• Press About Sunreef

• 60 Sunreef Power
• 70 Sunreef Power
• 80 Sunreef Power
• 100 Sunreef Power
• Sunreef Ultima Range
• Sunreef 44 Ultima
• Sunreef 55 Ultima
• Sunreef 66 Ultima
• Sunreef 77 Ultima
• Sunreef 88 Ultima
• Sunreef fleet

• Sunreef Zero Cat
• Sunreef 100
• Sunreef Fleet

• Sunreef 35M
• Sunreef 43M
• 49M Sunreef Power
• 210 Sunreef Power Trimaran
• Sunreef Explorer
• 40M Sunreef Explorer
• 40M Sunreef Explorer Eco
• 50M Sunreef Explorer
• Superyachts Fleet

Recharge at Sea: Solar Catamarans Harness Sun-Powered Serenity

Just as a residential solar system makes a house independent of an electricity grid, a marine solar panel makes a yacht independent of a fossil fuel powered generator. Catamarans boosted by solar power systems are increasingly in demand in today’s day and age for their increased energy efficiency and reduced environmental impact.

Here is everything you should know about solar catamarans from Sunreef Yachts Eco :

An Introduction to Solar Catamarans

Derived from natural sources, renewable energy is replenished at a far higher rate than consumed. Of these, solar energy is the most abundant renewable energy resource on Earth that may even be harnessed during cloudy weathers. Additionally, because sunlight remains omnipresent, powering a watercraft with solar energy is a fitting concept.

Before we continue exploring the subject of solar catamarans, let us focus on the architecture. The twin hull structure of catamarans translates into a large beam, which provides ample space for solar panels installation. To top it off, catamarans have a fairly shallow draft that produces little to no drag, making them exceptionally energy efficient .

Marine solar panels are currently gaining substantial popularity amongst catamaran designers and manufacturers as a medium of supplying clean energy via a reliable source. Sunreef Yachts Eco is a pioneer in solar catamarans as we believe that the incorporation of a solar power system into yachts births an environmentally friendly yachting solution with a significantly reduced carbon footprint.

The Benefits of Solar Catamarans

The ocean is home to the largest continuous ecosystems; unfortunately, it also remains the most sensitive. Millions of people across the globe indulge in recreational marina and boating activities leaving behind pollution in their wake.

Here are three ways in which solar catamarans rectify commonly occurring hazards for the greater good of the environment:

1. Fuel (oil or gasoline) spills and the discharge of combusted fuels from engines readily contaminates water surrounding the marinas. This aggravates toxicity levels in water, resulting in increased pollutant concentrations in aquatic organisms and sediments.

For illustration, coral reefs, which are a vital source of nitrogen and nutrients for marine food chains and provide shelter for over one million aquatic species, are nearing extinction due to water pollution. Installing solar panels would, without a doubt, decrease the dependency of all types of watercrafts on non-renewable energy sources, i.e., fossil fuels, for operations and increase energy efficiency.

2. Noise from moving gas-powered ships cuts straight to the sea floor and back. These acoustic vibrations transmitting end-to-end affect marine animals to a great extent. Research suggests that human-caused noises result in disrupted behaviours, increased stress, and impaired feeding in marine life, leading to injury and death. Solar catamarans are far quieter than their combustion-driven counterparts; thus, they maintain the oceanic silence vital for the marine life as it enables communication and continuous growth.

3. The elimination of fuels also makes solar yachts more affordable to run and maintain in the long haul. In comparison to fuel powered generators, solar catamarans produce electricity at a lower cost since solar panels obtain power via the sunlight, a renewable source of energy that is present in abundance. But even if your catamaran utilizes both fuel and solar power, you are still to enjoy significant savings on fuel.   

Why Power A Boat with Solar Panels   

Apart from the obvious environmental factors, solar panels fulfil an important criterion for the oceangoing voyagers who do not wish to be left stranded far from land with a dead battery: unlimited backup power.   

On a typical sailing day, there is ample sunlight to ensure the backup battery restores enough power to generate electricity that keeps motors, electrical systems, and onboard appliances running. An added benefit of solar panels is that they continue to generate power even when the catamaran is at a standstill. This energy is stored in batteries for later use.   

Furthermore, unlike gas powered generators, solar catamarans do not produce excessive heat, are quieter, and experience little to no vibrations. This allows boat trips to remain pleasant for sailors and vacationers.   

Sunreef Yachts combines luxury with sustainability to offer noiseless, vibration-free, and fume-free cruising experiences. Launched under the Sunreef Yachts Eco flag, our sailing and motor yachts are powered using inhouse engineered solar panels that are fully integrated within their composite structure for optimal results. However, an additional asset for sailing solar catamarans remains the ability to combine eco motoring with wind propulsion with the use of high-performance kites.   

The Mechanism of the Solar Power System   

Classification of solar panels   .

There are various kinds of solar panels available for marine boats: adjustable panels, standard panels, and high-energy thin-film panels. While some may argue that having a portable solar panel makes it easier to relocate to where the sun shines the brightest, permanently mounted panels remain ready to go throughout the day.

Despite their long life, standard panels often fail to find a place in the marine industry as they compromise the space availability onboard. Hence, high-energy thin-film panels emerge as winners due to their ability of being permanently embedded on the solar catamaran’s bodywork without restricting living space.

The research and development team at Sunreef Yachts Eco developed the industry’s first composite integrated photovoltaic technology to produce highly efficient, shock resistant, flexible, and ultra-thin solar panels. This in-house engineered solar power system was recognized as a winner of the German Design Award 2022 in the category of Excellent Product Design: Eco Design .

Each solar panel consists of photovoltaic cells, compromising of a positive and negative layer for creating an electrical field. These are made of singly-crystal silicon, a semiconductor that absorbs the radiations of the sun to produce electrical power via the photovoltaic effect. For better understanding: the photovoltaic effect is the process of converting photons (a particle of light) to voltage.

Technical Specifications of Solar Panels

While the average solar panels’ weight lies between 8 to 15 kilograms per square meter, Sunreef Yachts Eco’s solar cells have a thickness below one millimetre and weigh only 1.8 kilograms per square meter. This makes Sunreef Yachts Eco the lightest marine solar power system producer in the solar catamaran market.

Each of the solar cells administered into the Sunreef solar catamarans are ISO 9001:2015 certified and offer a peak performance of ±24 percent, this is 25 to 30 percent more power compared to conventional cells. Despite this, these solar cells do not heat up excessively when receiving sunlight.

Integration Into the Solar Catamarans Structure

The orientation of the sun should be as such as that it hits the solar panels at a 90° angle for best performance. However, with the Earth rotating around its axis to produce a 24-hour day, it is non-viable to ensure the perfect angle throughout the day.

What is more is that the amount of energy produced may also differ depending on external factors, such as a building preventing direct sunlight from hitting the solar panels or light experiencing diffraction from the waterbody before contact. For this reason, it is best to invest in high-efficiency solar cells that generate maximum energy even from limited number of active panels.

Sunreef Yachts Eco makes the most of its solar catamarans’ space availability by spreading its “solar skin” across the hulls, mast, superstructure, bow terrace and bimini roof. Due to this arrangement, the solar panels receive ample sunlight at desired angles from early morning to late afternoon.

At the same time, light rays bouncing off the surface of water to the solar panels, in a process called reflection, also helps generate electricity. These superior performance solar panels possess great strength and durability to survive adverse conditions, year after year.

Generation of Electricity on Solar Catamarans

The crystals in marine solar cells are treated to enable the movement of electrons to generate an electric current. These silicon electrons activate only when in direct contact with sunrays. Instantaneously they start producing direct current (or DC) charges, which is captured by wires and stored in the batteries as energy.

At this point, a charge controller is employed as a regulator for the energy to transfer from the solar panels to the battery. It not only manages the energy load received by the battery, but also prolongs the battery life and performance by ensuring the battery is not overcharged or overloaded. Solar catamarans deploy multiple charge controllers depending on the energy produced.

While the current may be supplied directly to support the electrical demands of the catamaran, if the appliances demand alternating current (or AC), an inverter is added to the cycle to convert the DC to AC first.

Solar Catamarans in Action

But how much energy is enough energy? Working out a catamarans’ energy requirements requires summing up the energy consumed by each device onboard in watt-hours. For better understanding: energy is power accumulated over time, so if power is calculated in watts, energy is watt-hours.

Hence, the first step of installing solar panels dictates an extensive energy assessment of the watercraft. This requires checking the labels of every individual appliance onboard for its typical amp hours and volts used, be it the fridge, fan, or lightbulb. A battery monitor can also help measure energy consumed more accurately.

Depending on the size of the catamaran and the energy consumed, the solar panels size and wattage of power can be precisely determined. Multiple solar panels may be wired together to form a solar array for maximum energy generation. Aiming to fulfil the power needs of your catamaran with solar panels allows you to enjoy a quiet, peaceful anchorage.

Overcoming The Challenges of Solar Catamarans

While yacht solar panels resolve the problem for keeping the batteries topped up without running the generator, solar power systems are faced with challenges of their own. For starters, the harsh weather incurred at sea and saltwater splashing on or immersing the panels accounts for much damage.

However, technological advancements have enabled solar panels to withstand most of these environmental adversities. To illustrate, the installation and electronics linked with solar power systems have now become more resistant to short circuits and corrosion.

Sunreef Yachts Eco employs a unique photovoltaic integration technique in solar catamarans to give the panels extreme resistance to shock and abrasion. Even if the cell eventually cracks, the solid metal foundation remains intact to maintain a high-power output. Furthermore, these solar panels experience no light-induced degradation, no temperature coefficient, and favourable low-light and broad spectral response.

Likewise, the constrains of surface area for marine solar PVs have been addressed with the ability to manufacture customized solar panels. For instance, Sunreef Yachts Eco uses the lightest solar cells in the industry which offer unparalleled flexibility for placement on rounded surfaces of the solar catamaran while others break under pressure. Here solar panels are integrated vertically (on hull sides, flybridge sides, and mast) and horizontally (on front flybridge and bimini) to maximize energy generation.

While the Sunreef Yachts Eco’s solar panel system has a protracted life expectancy, any panels sustaining damage, due to adverse conditions at sea or other geographical circumstances, can easily be replaced. However, it is proven repeatedly that their performance remains unaltered over extended periods of time.

Efficiency of Solar Catamarans Vs. Diesel Yachts

Solar panels make for an ideal energy provider as they ensure the batteries always have power. This makes solar catamarans more self-sustainable and cost efficient to run in comparison to gas-powered ones. Additionally, fewer moving parts in solar catamarans call for significantly lesser maintenance in comparison to diesel yachts.

Boats of all shapes, sizes, and types (sail or motor) can be powered via solar energy to run all onboard appliances on battery. Apart from fulfilling the watercrafts’ day to day electrical usage, utilizing a renewable source of energy extends the durability and reliability of the catamaran.

But most importantly, a solar powered yacht compared to a standard diesel yacht has a significantly reduced carbon footprint. Ideally, with the use of solar power generation on catamarans, you would save 108.5kg of CO2 emissions per day or 39.6 metric tonnes annually.

Why Invest in A Solar Catamaran?

The wind in your hair, the sun on your face, and the sweet smell of the sea are one of the many joys of sailing. However, as an ocean enthusiast, it is crucial to calculate your impact on the environment. On average, the Sunreef Yachts Eco’s solar catamarans account for substantial electricity generation of up to 30 kWh, promoting a positive green footprint.

Today, solar catamarans are trending among yacht owners and shipbuilders as a clean medium to increase energy efficiency and reduce carbon emissions. Additionally, staying true to its legacy of yacht innovation and evolution, Sunreef Yachts Eco continues to work on advancements to its solar panels for improved performance, efficiency, and durability.

Evaluating the Sunreef Yachts Eco Solar Catamarans

Using advanced technology, Sunreef Yachts Eco has engineered ultra-thin, flexible solar panels with the best performance on the market. They are seven times lighter than the average solar power system, enabling them to be fully integrated into the composite structures, including curved surfaces.

The more surface area covered, the more electricity generated. The 80 Sunreef Power incorporates 200 square meters of solar panels (weighing about 360 kilograms) that deliver an astounding 40 kilowatts peak per hour. This setup alone produces solar energy equalling to two generators weighing 800 kilograms altogether.

Hence proven that Sunreef Yachts Eco optimized marine solar panel system outperforms a diesel generator both by weight and performance. Additionally, at reduced speeds, the Sunreef 80 Eco remains fully autonomous, running solely on solar power.

In light of sustainable yachting, Sunreef Yachts Eco has committed to launch over 40 models of its solar catamarans by the end of 2024; this includes a wide selection of sailing yachts, power yachts, and superyachts. Furthermore, Sunreef Yachts has begun commissioning a new range of technologically advanced hybrid ecospeeders, called the Sunreef ULTIMA , that would further extend their solar catamarans line up.

Future Innovations in Solar Catamarans

Despite the distinctive competency of Sunreef Yachts Eco in solar catamarans, the journey of innovation does not come to a halt. To further reduce our carbon footprint, we are undergoing ground-breaking research to redirect excess heat secured from direct sunlight on solar panels to the boilers of our solar catamarans.

Furthermore, Sunreef Yachts Eco is currently developing a concept of an all-new 90 feet sustainable sailing superyacht , called ‘The Zero Cat’ . Apart from sporting a solar power system, this catamaran will use a zero-emission generator to convert methanol to clean hydrogen for unlimited autonomy and greater self-sufficiency.

Frequently Asked Questions

• Why are solar catamarans favorable?  Because sunlight remains omnipresent, solar catamarans discern as a greener, cost efficient, and self-sustaining yachting solution . The environmentally friendly passenger conveyance from Sunreef Yachts Eco is consciously built to counter air, water, and sound pollution.
• What is a solar catamaran? A solar catamaran is a twin-hulled vessel powered by solar panels, harnessing sunlight to drive its propulsion and onboard systems, offering an eco-friendly alternative to traditional fossil fuel-powered boats. Powered using inhouse engineered solar panels, solar catamarans designed and manufactured by Sunreef Yachts Eco encourage a positive green footprint at sea. 
• Do solar catamarans exist? Launched under the Sunreef Yachts Eco flag, our sailing and motor yachts are powered using inhouse engineered solar panels that are fully integrated within their composite structure for optimal results. The Polish designer and manufacturer has also committed to launch 40 additional models of its solar catamarans in 2024.
• Are there any solar powered yachts? With an increasing demand for solar catamarans with increased energy efficiency and reduced environmental impact, Sunreef Yachts Eco has put to sea several variants of its sailing and power catamarans such as the Sunreef 60 Eco , Sunreef 70 Eco , Sunreef 80 Eco , and 80 Sunreef Power Eco
• What are the advantages of solar catamarans? The installation of solar panels reduces a watercrafts sole dependency on non-renewable energy sources for operations. In comparison to their combustion-driven counterparts, solar catamarans offer noiseless, vibration-free, and fume-free cruising experiences.
• How much is a solar-powered catamaran? With Sunreef Yachts Eco’s philosophy of promoting clean green yachting, the company has released a new range of solar catamarans , the Sunreef ULTIMA , with prices starting as low as €2M* for the 44 ULTIMA ECO . *Please note that all prices listed are subject to change at any time without prior notice.

ULTIMA RANGE

Previous post the revolutionary electric catamarans introduce zero emission cruising, next post dubai international boat show.

Comments are closed.

SUBSCRIBE TO OUR NEWSLETTER

• Sailing Yachts
• Power Yachts
• Superyachts
• Making a Change
• Green Concept
• Energy Efficiency
• Sustainable Materials

Copyright © 2024 Sunreef Yachts . All rights reserved.

• Whistleblowing
• Privacy Policy

Sunreef Venture S.A.

Sunreef Yachts Shipyard

ul. Tarcice 6

80-718 Gdańsk, Poland

+48 58 769 77 77

Electric boats

Electric yachts, this new solar electric yacht with its own spa pool and theater awaits you.

Renowned luxury yacht maker, Sunreef, released plans for a new 108-ft (33-m) solar-powered electric superyacht complete with its own pool spa and indoor theater. Did I mention it’s also fully autonomous?

Best known for its comfort, stunning beauty, ultra-luxurious accommodations, and high performance, Sunreef continues to push the boundaries with its luxury catamarans.

Sunreef is well known around the world for its luxury sailboats, power catamarans, and superyachts, with customers including Tennis superstar Rafael Nadal.

On Friday, the company revealed its latest superyacht, the 33M Sunreef Explorer Eco. Sunreef says the new model “rewrites the rules with bold architecture and a fresh approach to travel.” Perhaps most importantly, the 100-ft-long yacht travels silently without harmful fumes or vibrations.

Powered by two 400-kW electric motors, a 990-kWh battery pack system, and two 300-kW range extenders, the 33M Sunreef Explorer Eco “was designed to take you to the most remote cruise grounds in silence.” However, no specifics were mentioned on the range yet.

Made from aluminum and advanced composite materials, the electric yacht’s design maximizes the space for harnessing solar energy.

With included solar panels built into the hulls, superstructure, bimini roof, and entire full-beam bow terrace, the electric superyacht’s photovoltaic system can generate up to 50 kWp of clean solar energy.

The 33M Sunreef Explorer Eco enhances efficiency with energy-saving air conditioning and a smart energy recovery system. It also features a rainwater collection system, water-saving traps, watermakers, and an ultra-efficient boiler using heat recovery.

On the inside, you will be blown away by the vastness of the 535 m² of living space that can be customized to include a spa, a library, or a gym.

It also has space for ten guest rooms and seven crew members. The large main suite has an outdoor deck area, while the level below it features an outdoor pool, bar, and dining area.

This is luxury living at its finest with no emissions. What do you guys think? Are you ready for Sunreef’s new solar electric superyacht? Although the price is not yet listed, you can imagine how much it will cost for all of this.

FTC: We use income earning auto affiliate links. More.

Peter Johnson is covering the auto industry’s step-by-step transformation to electric vehicles. He is an experienced investor, financial writer, and EV enthusiast. His enthusiasm for electric vehicles, primarily Tesla, is a significant reason he pursued a career in investments. If he isn’t telling you about his latest 10K findings, you can find him enjoying the outdoors or exercising

Manage push notifications

Avasolar is reader-supported. When you buy via our links, we may earn a commission at no cost to you. Learn more

Choosing the Best Marine Solar Panels for Your Boat

There’s nothing like kicking back and relaxing in a boat all to yourself. But while sailing the waves and soaking in the sun is an awesome getaway, you’ll still need to think about how to generate electricity while on board, especially for running your boat battery.

Get free power through solar energy with the best marine solar panels. Not only are they easy to set up and use, but you also save money by relying on renewable energy instead of paying expensive electricity bills like usual.

But how do you look for the most suitable solar panels for boats if there are dozens of solar panel types out there? Well, you’ve come to the right marine solar panels review. There are three key things you need to keep your eyes out for when choosing marine solar panel kits for your beloved boat.

• Waterproof: Since you’ll be traveling across bodies of water, you have to anticipate that your solar panels could get wet. Make sure your solar panels are resilient against water damage through waterproof designs.
• Flexible: Boats have curved surfaces, unlike roofs that are flat and can do with rigid panels. Marine solar panels can be straight and conventional, but it would be a big help if they were flexible so that you can mount them on tricky surfaces on your boat. Flexible solar panels hug irregular surfaces, ensuring they don’t topple over as your boat moves.
• Thin: Boats are small spaces as it is. You don’t need bulky, rigid panels occupying more space than necessary. Go for ones that are about an inch or so thick. Thinner solar panels are sleek and don’t take up too much space, so they’re a must for marine solar solutions.

There are many other factors you need to consider when looking through boat solar panels for sale. Check out the rest of the important factors in our buying guide below.

Need more help picking out a good boat solar panel kit? Look through this rundown of solar panels for boats reviews to see some of the most popular options.

Best Overall

Renogy Monocrystalline Solar Panel

Premium Choice

Topsolar Solar Panel

Editor’s Pick

ECO-WORTHY Solar Panel

Table of Contents

1. Renogy 100W 12V Monocrystalline Solar Panel

2. topsolar 20-watt monocrystalline solar panel, 3. eco-worthy 25w off-grid solar panel, 4. renogy extremely flexible solar panel, 5. suner power 30w polycrystalline solar panel, 6. newpowa monocrystalline 100-watt solar panel, 7. rich solar polycrystalline solar panel, 8. topsolar 100-watt 12-volt solar panel kit, 9. newpowa monocrystalline 30-watt solar panel, what to look for when looking through marine solar panel options, how many solar panels do i need to run a boat, how many amps does a marine refrigerator use, how do you install solar panels on a boat, top-rated marine solar panel reviews.

• Material: Monocrystalline
• Wattage: 100W
• Voltage: 12V

This solar panel kit by Renogy is awesome because it’s an all-in-one solar system. It includes all the necessary cables and accessories to get the show on the road.

The convenient kit includes a 100-watt solar panel, the Wanderer 30A PWM controller, and connectors and adapters. It even has Z brackets for mounting your solar panel. I like that I didn’t have to purchase all these separately.

I like that the Wanderer charge controller is negative ground, which means it prevents any overcharging and short-circuiting issues with our batteries.

Now, for the solar panel itself, I appreciated how the frame was made of sturdy, high-quality, corrosion-resistant aluminum, making the panel extra durable.

Its monocrystalline solar cells can convert 21% of the solar power to free energy you can use on your boat. That’s pretty high compared to other solar panels.

Plus, the production power of this solar panel kit is quiet, so it won’t bother you when you need silence.

• Includes the necessary connectors, controller, and mounting brackets
• The negative ground controller stops overcharging and short circuits
• The solar panel has a durable, corrosion-resistant aluminum frame
• Monocrystalline cells convert 21% of solar power into free energy for you
• Power production is quiet, so it will never disturb users
• The charge controller has no LCD screen
• Wattage: 20W

This Topsolar solar panel kit is another one that offers a lot of accessories. It comes with a charge controller, some alligator clips to hold your cables and connectors properly, and even an O-ring terminal.

The solar panel itself is made of thick, high-class tempered glass to protect the cells inside. It’s framed with aluminum for extra sturdiness as well. I love that it’s made of such premium materials, so I never have to worry about it being too flimsy or break apart easily.

All in all, the solar panel weighs a mere 4.8 lbs, making it easy to carry around. It’s lightweight enough for effortless lifting and transporting when I’m about to install it or move it to another area.

This marine solar panel is resistant to harsh weather, thanks to its maximum static load of 2,400 Pa. Because of this, you can use it worry-free, even in inclement climates.

There are pre-drilled holes at the back of the panel to make it easier to set up with screws and grommets.

• Comes with a charge controller, alligator clips, and O-ring terminal
• The panel is made of tempered glass and an aluminum framing
• Weighs only 4.8 lbs, so it’s easy to lift and carry around
• Resistant to harsh weather like wind or snow
• Has pre-drilled holes at the back to make set-up easier
• Doesn’t include mounting brackets
• Material: Polycrystalline
• Wattage: 25W

A long lifespan is one of the top factors I consider when looking for a marine solar panel. This one by ECO-WORTHY ticks off that box because it is built to last.

It’s made with highly efficient cells to give me adequate power output. The framing is designed with aluminum to make it sturdy, increasing its longevity.

This off-grid solar panel kit comes with a convenient charge controller. Its interface may not have a modern display screen, but it does have light indicators that update in real-time so you can tell how far your charge is coming along. It also has a USB port to let you charge your phones and other small devices.

The solar panel set comes with SAE connector cables to help users set up. They’re quite long and stretch to 9.84 feet, giving us maximum flexibility for moving our panel and charge controller around.

ECO-WORTHY offers a one-year warranty for this kit. You’ll also have access to the brand’s 24/7 hotline in case you have questions or concerns with your solar panel.

• Made with high-efficiency solar cells and aluminum for longevity
• Charge controller has power indicators that update in real-time
• There’s a USB port on the charge controller for small devices
• The SAE connector cables are quite long at 9.84 feet
• A one-year warranty with 24/7 technical support from ECO-WORTHY
• One 25W solar panel might not be enough to power multiple appliances

Setting up solar panels on curved surfaces is tough, but with these Renogy flexible solar panels for boats, it’s never a challenge.

These flexible solar panels bend to a 248-degree arc, which is a lot more flexible than other bendable panels. This is excellent for boat and yacht decks that are curved.

The panels are made of monocrystalline cells that emit 100 watts, ensuring a strong and reliable power supply for our consumption.

Transporting and setting up these flexible solar panels is a walk in the park, thanks to its lightweight and super thin design. They’re never bulky and retain the smooth silhouette of your boat.

They’re thin and light because they’re designed with advanced polymer, which is 70% lighter than other materials traditionally used to build solar panels.

These flexible panels are made to withstand bad weather. They resist impact and don’t get damaged in heavy loads of rain. You’ll find that they even tolerate up to 5,400Pa of snow.

• Bends to a 248-degree arc to fit irregular and curved surfaces and decks
• Monocrystalline panels emit a consistent 100 watts
• Super lightweight and ultra-thin, making it a breeze to transport
• Made with advanced polymer that is 70% lighter than traditional materials
• Resists impact and damage from heavy loads of rain and snow
• The cables in the solar panel kit aren’t the same length

These solar panels by SUNER POWER are built with high-efficiency polycrystalline cells, giving me great performance even with the small energy output. They emit up to 30 watts of power to use as free energy on the boat.

This kit charges our batteries safely. It goes through a strict three-step intelligent algorithm to make sure our battery doesn’t go through overheating and short-circuiting, so I know I’m extra safe.

You’ll also find bright LED lights on the charge controller that indicate how the charge is coming for easy monitoring. It’s a convenient way to make sure our charging is right on track even when we’re doing other errands on the boat.

Tough weather conditions are nothing when it comes to this marine solar panel. It’s built with IP65 waterproof technology, so I don’t have to worry about the climate damaging my solar panel kit. It can even resist erosion, rusting, and damage from the sun’s UV rays.

• Polycrystalline cells emit 30 watts of power to use as free energy
• Charges our battery safely with an intelligent three-step algorithm
• Has bright LED light indicators so you can see how your charging is going
• Withstands tough weather because of IP65 waterproof technology
• Resists erosion, rusting, and UV damage in finicky weather
• The wires could be longer

This Newpowa monocrystalline panel is smaller in size compared to most other panels. It comes up to about 45 x 20 inches, making it more manageable than bigger ones.

It’s made of monocrystalline cells that are highly efficient in turning power from the sun into free energy for our consumption and charging.

The panel’s aluminum framing prevents any corrosion, which extends the lifespan of the solar panel kit. That means I won’t have to constantly replace it.

The marine solar panel and some of its accessories are made to be waterproof. That way, they’ll survive even the most horrible weather conditions as you sail.

Venturing to areas and cities without much bright sunlight is no problem for this marine solar panel kit. The junction box is equipped with bypass diodes that ensure users don’t get any power outages even in cloudy, shaded areas.

• Smaller in size and more manageable than other solar panels
• The monocrystalline panels are efficient in converting power into energy
• Aluminum framing prevents corrosion, extending the solar panel’s life
• These monocrystalline solar panels can survive horrible weather
• Junction box has diodes to let your power work even in low-light areas
• You don’t get the rated 100-watt output every single day

This RICH SOLAR panel is one of my favorites for travelling. I love it because it allows for more sunlight absorption. The panels’ anti-reflective, high-transmission film also helps make energy conversion more efficient.

Because of these factors, this panel works extremely well even in areas that are low in sunlight . So when I know I’m going to be sailing to cloudy shores, I make sure to bring this panel along.

This set uses quick-connect cables that don’t take more than a few seconds to fix up. It makes installation fast and easy even for beginners.

There are also about 14 holes on the panel so that you can simply screw it onto your mount. That means you can set it up without the complication of drilling the holes yourself. The design is also compatible with a variety of mounts, further adding to user’s convenience.

• Its anti-reflective panels are high-transmission for even more efficiency
• High conversion efficiency even in areas without bright sunlight
• Uses quick-connect cables, so setting up is fast and easy even for beginners
• There are 14 pre-drilled holes on the panel for quick installation
• Works with many types of mounts
• Doesn’t include mounting brackets, so you have to purchase some

This solar panel by Topsolar emits 100 watts of power to charge any 12-volt battery while you’re on the go. It’s perfect for cars, RVs, and a huge range of off-grid uses, but it works excellently for boats too.

The panel is made with monocrystalline cells, protected by a coating of high-quality tempered glass. This protective layer also prevents wear-and-tear in the long term. Meanwhile, anodized aluminum frames the panel, protecting the edges from corrosion.

You get a V-shaped bracket along with your panel in this kit. This bracket allows users to tilt the panel in whatever direction they desire. It’s very helpful when we’re trying to position the panel to face the sunlight directly.

The charge controller this solar panel comes with is made with IP67-rated waterproof technology. This means it prevents any water damage from ruining our solar system.

• Charges any standard 12-volt battery while you’re on the go
• A wide range of uses
• The mono cells are protected with wear-resistant tempered glass
• The framing is made of anodized aluminum to protect the panel’s edges
• Comes with a V-shaped bracket to tilt the panel in the direction of the sun
• The charge controller is made with IP67 technology to avoid water damage
• The panel is quite heavy at almost 16 lbs, making it heavy to carry

This Newpowa panel emits 30 watts of power. That may sound small to some people, but it’s perfect for charging small devices and running just a few appliances on a short boat ride.

It’s made with high-efficiency monocrystalline cells. These cells allow for a more compact panel design that is smaller and more manageable than the brand’s polycrystalline panels.

Multiple layers of the panel protect its cells. This includes an ethylene-vinyl-acetate encapsulation, iron tempered glass, and even a TPT back sheet that can help with heat dissipation.

There are wires already pre-attached to the panel, one at 3 ft and another at 1 ft. Both of these have Anderson connectors as well, so users don’t have to fuss about setting them up themselves.

The panel also has holes pre-drilled in them, so it’s ready to be screwed into your mount or bracket of choice.

• Provides 30 watts of power, perfect for small devices and short trips
• Made with high-efficiency mono cells that allow for a compact design
• Cells are protected by multiple layers, like tempered glass and TPT backing
• The wires and connectors are pre-attached, which is great for beginners
• Comes with mounting holes already drilled on the back of the panel
• The solar panel isn’t weatherproof, so you can only use it on sunny days

HQST 100W 12V Solar Panel (Outdated)

This 100-watt solar panel by HQST is designed for efficiency and durability. The panel itself is anti-reflective, thanks to thick and durable tempered glass. It’s also lined with aluminum in its framing, which resists corrosion and damage to the panel’s edges.

Polycrystalline solar panels like this one are made with high-efficiency cells that convert more power into energy than the usual panel. They also contain diodes to bypass any power outages or drops when your boat travels into a shaded area.

This kit’s junction box is rated IP65, which means it’s waterproof. That way, it can resist damage from water jets and uncontrollable weather.

Installation is a breeze with the pre-drilled holes at the back of this panel. It’s perfect for newbies that don’t want to call in a professional to set it up.

• The anti-reflective panel is made with sturdy tempered glass
• An aluminum frame
• Polycrystalline panels efficiently convert the sun’s energy into power
• Contains diodes to bypass power outages when you go into low-light areas
• The junction box is rated IP65 to resist damage from undesirable weather
• Comes with holes drilled at the back of the solar panel for easy mounting
• The wires on the panel are quite short

WindyNation 100W Off-Grid Solar Panel (Outdated)

I love that this solar panel by WindyNation gives off a consistent 100 watts of power, provided that the panels are positioned directly under the sun. That makes it an ultra-reliable panel that isn’t flip-floppy when powering our devices.

The solar system comes with many accessories you’ll need to set up and use your panel. There’s a quality charge controller, some mounting brackets, and all the necessary cables needed.

My favorite part about this system is the charge controller. It has a high-quality LCD screen that displays all the information I need to see about my battery as it charges. It even has a sensor to help me monitor the battery’s temperature.

I can also choose and adjust what information settings are shown on the screen, depending on my preference. Buyers can get whatever information they’d like to know—amperage, amp-hours, temperatures, voltage, and more!

• Consistently provides 100 watts of power when positioned under the sun
• Comes with a charge controller, mounting brackets, and cables
• The charge controller has an LCD screen
• Sensor for battery temperature
• You can choose and adjust what settings to see on your LCD screen
• You must purchase fuses and fuse holders to complete this solar system

SUNER POWER 12-Volt Waterproof Solar Panel (Outdated)

This solar panel by SUNER POWER doubles as a battery charger. It’s powered by highly efficient polycrystalline cells on a sturdy solar panel. These solar cells generate battery power in any condition, even when the sun isn’t so bright.

The charging system follows a stringent and smart three-step algorithm, keeping your battery safe as it charges. It does so with a unique “Maximum Power Point Tracking” (MPPT) chip, which prevents battery issues like overcharging and short-circuiting. MPPT also allows the charge controller to generate up to 30% more power than others do.

The controller has a LED light where you can see all the pertinent information on your battery, like whether it’s charging and if the battery’s full.

This entire solar system is made with IP65 waterproof technology. It won’t be susceptible to water damage, so users don’t have to worry about backflow from the water around the boat causing damage to it.

• High-efficiency polycrystalline solar cells generate power in any condition
• Has a smart three-step charging algorithm for a safer charge
• Its unique MPPT chip protects your battery
• MPPT controller generates up to 30% more solar power than others
• Has a LED light to indicate battery status
• The system is IP65 waterproof, so it won’t be susceptible to water damage
• Designed to work only on 12V batteries

Easy to install through grommets or adhesives

Setting up traditional solar panels on regular surfaces like walls and roofs can be difficult as it is. It might be trickier on a moving, swaying boat.

Make sure your marine solar panels are a breeze to set up. Look for ones that are okay to simply stick onto surfaces with adhesives, or have pre-drilled holes so you can screw them onto a mount quickly.

Provides an adequate amount of energy to power up your batteries and appliances

Select marine solar panels that will give you the right amount of solar power to meet your energy requirements.

For example, if you only need solar power on the boat to charge devices in the short term, 50W or 100W might be enough for your trip.

However, if you intend to use your solar panel to charge marine battery, you’ll definitely need one that converts a higher amount of solar energy—perhaps some 200 watt marine solar panels.

Comes with all the necessary accessories, like connectors and junction boxes

Don’t put yourself through the hassle of buying each part of your marine solar system separately. Look for solar panels that provide all the necessary cables, boxes, and accessories to get you set up immediately. Ensure that your panel comes with connectors, junction boxes, charge controllers, and more.

Manufactured by a legitimate and respectable solar power brand

You must always purchase solar panels from legitimate brands that will give you top-notch and high-quality panels. There are many bogus panels in the market today, so double-check to make sure the solar panels you’re buying come from good, renowned manufacturers

If you’re not sure which solar panels to buy, it’s wise to go for classic, tried-and-tested brands. These include Renogy, TP-Solar, and SunPower marine solar panels.

Plus, buying from bigger brands will increase your chances of getting a product warranty that lasts years.

It depends on how much power you need to keep your appliances and gadgets up and running.

For shorter, one-day excursions, you can live with just one or two high-quality solar panels to provide some electricity to charge your phones and maybe a mini-fridge for the day.

But if you’re planning to sail for longer and live on the boat 24/7, you’ll probably need a bigger boat solar system with as many solar panels as you need. This is because you’ll likely have to run bigger appliances and lights, which demands more solar energy.

If you have a 12V marine refrigerator, it will likely only use up anywhere between 2-6 amps per hour. One solar panel emitting a usual 100 watts is more than enough power for such a fridge.

There are many different ways to set up solar panels on boats. If your solar panel is flexible, thin, and ultra-light, you can simply secure it in place with adhesives.

Thicker panels may need to be screwed in with grommets. If this is the route you’re going for, make sure you have sturdy mounting hardware to place your solar panels in.

Traveling through water may be relaxing and stylish, but the excursion is never complete without the best marine solar panels to provide solar energy and battery power during your trip. Hopefully, this round-up of traditional and flexible marine solar panels reviews help you out on your hunt to find the best panels.

Just make sure your panels are efficient in providing high power, waterproof to avoid damage from the sea, and thin and lightweight for easy mounting and storing. If you tick all those boxes, your sailboat solar panels should be all good.

I am Kathleen Miller, staff writer and reviewer of the Avasolar team. Working with the team has been a pleasure for me so far, I hope to bring readers useful information by creating detailed and easy-to-follow contents.

Coppercoat: The environmentally sensitive antifoul choice *sponsored post*

Yachting Monthly sponsors the Chichester Marina Boat Show and Watersports Festival

Round the Island Race 2019: Entries open

Düsseldorf Boat Show 2019: Fairline announces yacht line-up

Düsseldorf Boat Show 2019: Bavaria to showcase its complete range of motoryachts

• Subscribe Now
• Digital Editions

Best boat solar panels: 6 options for boosting your yacht’s power

• Phil Sampson

We take a look at 6 of the best solar panels for boats, from folding units to cutting-edge flexible panels

Free power forever? If only it was that simple! Photo: Graham Snook

For many in the boating community, boat solar panels represent something of a holy grail. They are, after all, the gift that keeps on giving, aren’t they? Free power forever, (or many years anyway), coupled with zero running costs – what could possibly be better than that?

All you have to do to make this dream come true is banish the memory of the purchase price from your mind – something boaters are notoriously adept at doing – and wait for the sun to shine. If only it were that simple…

The fact of the matter is that there are costs associated with boat solar panels beyond the price of the panels themselves. While some types of panels can be simply laid on the deck, in many cases some form of mount will be required.

Then there’s the wiring to hook them up to your battery, plus any fitment and/or cosmetic work needed to hide the cabling from view. If your panels are to be left connected permanently, you’ll require a regulator too.

This will prevent both overcharging and a reverse flow of power out of the battery after dark. If you do not fit a regulator, a blocking diode can be used to halt the reverse flow instead.

But once all of the above have been overcome – and providing you’ve done your homework to ensure your panels will generate sufficient power to cover your needs – then, yes, it’s a power free for all!

There are many other benefits to boat solar panels too: First and foremost, they work all on their own – solar panels are automatic, so you can just let them get on with the job.

Apart from the occasional wipe over and a wiring check, they’re largely maintenance-free too. Unlike wind generators, (especially like the one with wonky bearings on that boat moored next to you), they don’t make any noise.

And finally, your battery will be pleased, because keeping it from going flat can extend its life.

Here’s our choice of the best boat solar panels.

6 of the best boat solar panels available right now

Giosolar 1,000W flexible solar panel

Best flexible boat solar panel

Delivering a mighty kilowatt of power, (not far off the amount used by a one bedroom house), this Giostar package comprises ten separate 100W panels, each of which is 1,050 x 540 x 2.5mm in size.

Capable of charging either 12 or 24V batteries, a kit of this magnitude is one for the most serious of solar enthusiasts – Eco Experts reckons 660-990W is sufficient for a liveaboard.

Giostar panels are abrasion resistant, anti-rust and dust proof and their junction boxes are sealed and waterproof. The panels are also light, thin and flexible, and can withstand being bent up to 30 degrees.

Price: £1,464.45

Buy it now on Amazon (UK)

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Mobisolar 100W foldable solar panel

Best foldable boat solar panel

Mobisolar’s foldable panels are light (4.5kg) and measure 121 x 56.5 x 3 cm when unfolded, with the longest dimension reducing to 60 cm when folded, making them easy to transport.

The panels use advanced technology to provide superior performance, with each panel subjected to a thorough testing routine before and after assembly.

So confident is Mobisolar in its products that the company stands behind its panels with a two-year defect warranty and a five years’ electrical performance warranty.

For maximum flexibility in operation, three USB power outputs are fitted per panel, one delivering 100W, the second 60W and the third 10W.

Price: £145.00

Buy it now on eBay

Eco-worthy 100W solar panel kit

With 100W panels being ideal for keeping batteries topped up, our second offering in this power class is from Eco-worthy, a major player in the solar panel field.

Competitively priced, our link below is for a kit which includes an LCD control unit and four ‘Z’ brackets in addition to the panel itself.

The Eco-worthy 100W panel is of the monocrystalline type, which means their cells are made from an ingot grown from a single silicon crystal of high purity. It’s also a rigid panel, so this particular product would need to be mounted on a frame or flat surface.

Price: £113.99

PV Logic 20W Flexi solar panel

Offered by Force 4 Chandlery, this lightweight semi-flexible solar panel comes complete with a dual battery solar charge controller.

The panel is completely waterproof thanks to its six-layer, heavy-duty laminate finish, and should a wayward crew member plod over it in their size 9s the panel’s dimpled top surface is ‘self healing’.

The controller can handle both 12 and 24V systems and the panel’s PWM (Pulse Width Modulation) charging system is efficient and battery-lifetime friendly.

Supplied with LED battery-status indicators and 4 metres of cable, PV Logic Flexi panels can be bonded to flat or curved surfaces.

Price: £149.95

Buy it now on Force 4 Chandlery

Powoxi 10W solar panel

At the budget end of the market comes this Powoxi 10W solar panel charger kit. While you won’t go far on just 10W of power, this kit claims to be capable of charging and maintaining various 12V batteries.

The kit features a fully automatic charging and maintenance controller, which provides intelligent three-level charging and protection against short- and open-circuits, under voltage and overloading.

A reverse flow system is included and the interface is described as ‘plug and play’. While the panel is rainproof, it will not withstand immersion in water, so this is a product to perhaps leave behind on the dock when you take to the water.

Price: £27.59

Eco-worthy 10W/5W solar panel

The least pricey option we could find anywhere, this baby 5W solar panel is simply a trickle charger. But if that’s all you need then look no further, for this is another Eco-worthy product.

The technology in the panel is polycrystalline, so it’s not the most efficient on the market, but for this power that’s hardly a great concern.

The panel is supplied with two charging options; a pair of crocodile clips which attach directly to the battery, and a cigarette lighter plug.

According to the product’s eBay listing, this seller alone has sold approaching 3,000 of these units – and at this price, we can understand why!

Price: £9.99

• Green Propulsion
• Renewable Energy
• Energy efficiency
• Sustainable materials
• Eco Insights
• News & Events
• Sunreef News Magazine
• Press About Sunreef

• 60 Sunreef Power
• 70 Sunreef Power
• 80 Sunreef Power
• 100 SUNREEF POWER
• Sunreef Ultima Range
• Sunreef 44 Ultima
• Sunreef 55 Ultima
• Sunreef 66 Ultima
• Sunreef 77 Ultima
• Sunreef 88 Ultima
• Sunreef fleet

• SUNREEF ZERO CAT
• SUNREEF 100
• Sunreef Fleet

• SUNREEF 35M
• SUNREEF 43M
• 49M SUNREEF POWER
• 210 Sunreef Power Trimaran
• Sunreef Explorer
• 40M SUNREEF EXPLORER
• 40M SUNREEF EXPLORER ECO
• 50M SUNREEF EXPLORER
• Superyacht Fleet

RENEWABLE ENERGY ON YACHTS

Solar panels.

Solar catamarans harvest power from the renewable elements for a more eco-conscious and efficient cruising experience. In-house designed and manufactured by the shipyard, Sunreef Yachts’ solar panels are state-of-the-art. They can be easily mounted anywhere on the sustainable yacht’s surfaces, including the hulls and masts, maximizing solar power. The panels are fully customizable in terms of size and shape to easily adapt to any structure on board. Dismounting for maintenance and repair is effortless. Flexible and ultra-solid, they are the industry’s lightest panels. Sunreef Yachts is also the first company to integrate solar panels in the curved carbon bimini roofs of its eco yachts. The Sunreef shipyard ’s R&D department is also developing an advanced system to recover heat from the panels to heat up the eco-friendly yacht’s boiler.

Hydro Generation

Hydro generation is about creating power whilst sailing in a sustainable catamaran. Sunreef Yachts Eco yachts can be equipped with advanced electric propulsion allowing power to be generated from the propeller rotation while the yacht is navigating under sail. This energy can be used to power the propulsion battery bank as well as the electronics on board. Hydro generation is highly efficient on eco yachts as they can recover electric power from two engines. It is a reliable and endless source of power for eco-friendly yachts .

Wind Turbines

Wind turbines produce power from the wind to keep the yachts battery bank charged. They play a very important role in the energy mix of every eco yacht. They are a stable source of power throughout the day, but also at night and in cloudy weather, when the yacht cannot rely on solar power. Energy is produced not only under navigation but also while docked. Using a sustainable power source, wind generators can operate in various wind conditions, starting from very light winds to stormy weather. The turbines are usually placed atop of the eco-friendly yacht to maximize the conversion of wind power to electricity.

Green Concept

Green propulsion for eco catamarans, energy efficiency on yachts, sustainable finishing materials, see our range.

• Privacy Policy

Sunreef Venture S.A.

Sunreef Yachts Shipyard

ul. Tarcice 6

80-718 Gdańsk, Poland

+48 58 769 77 77

Yachting Monthly

• Digital edition

Sailing with solar power: A practical guide

• Duncan Kent
• November 13, 2020

The latest solar technology makes self-sufficient cruising much more achievable. Duncan Kent gives the lowdown on everything you need to get your boat sorted

SOLAR POWER ON BOARD

Solar power is fast becoming the most popular and economic method of keeping the batteries charged on a boat.

Particularly now that the efficiency of photovoltaic (PV) panels, charge controllers and batteries is improving every day.

Furthermore, the latest technology in regulators and charge controllers has brought about a noticeable increase in useable power output, so the problems of shading and non-alignment can be compensated for more easily.

Not only has PV equipment become more efficient and cost-effective, but many of the modern devices we want to use on a boat have become less power hungry.

This means it is now far easier to provide your entire yacht’s electrical needs, both 220Vac and 12/24Vdc, from natural energy resources – particularly solar power, even if you are planning on a fully electric boat .

Thinking carefully about how much power you need and how much your boat can accommodate is key to planning a solar array. Credit: Graham Snook

WHAT DO YOU NEED?

For instance, a boat with two new, good quality, deep-cycle house batteries of 100Ah each would supply 100Ah of energy to consume between charges, if you only use the recommended 50% of available charge between each charge cycle to protect the batteries.

From this you could run:

• a modern 12Vdc fridge (approx. 1.5Ah, or 36Ah over 24hrs),
• all LED lighting (say 20Ah per day),
• various small device chargers (20Ah)
• and a number of other items such as water pumps, TVs and stereos (25Ah/day)
• Totalling around 100Ah.
• For this you’d need 400W of solar capacity.

Of course, if you like to run a lot of AC devices off-grid such as hair dryers, microwaves, toasters and the like, then you’re going to need a DC/ AC inverter, which will take you to another level in power consumption terms.

But even then, with careful planning, solar could provide a large portion of the power you need before resorting to engine charging or a generator.

THE AVAILABLE SPACE

In practical terms, a modern 40ft monohull would have the space for around 1,200W of PV panels (cockpit arch, sprayhood top, deck), maybe 1,500W with the addition of a few portable panels for use at anchor.

The 1,200W of fixed position solar array could produce around 360Ah on a sunny summer’s day (zero shading) or more likely 250Ah on the average UK summer’s day.

So that’s enough for your 100Ah general DC consumption plus another 150Ah of AC consumption via the inverter.

Of course, to do this you’ll most likely need to increase your battery capacity to around 400-500Ah for maximum flexibility (you’ll need to store as much as possible during daylight hours), a typical figure for a 40-50ft offshore cruising yacht these days.

Get your solar charging right and you may never need to hook up to shore power

Typical daily inverter loads for a cruising yacht off grid might be:

• induction cooking plate (20min) 60Ah
• microwave (15min) 30Ah
• coffee maker (20mins) 25Ah
• hair dryer (5min) 15Ah
• laptop charger (2h) 10Ah
• or around 140Ah in total.

The trick is to monitor the batteries’ state of charge (SOC) at all times and vary your use of the inverter to suit.

For example, you might want to cook supper mid-afternoon, when solar is in abundance, and then reheat it in the evening when you want to eat it.

In some cases, when you’re cruising in warm climates such as the Med, you might end up with excess charge from your solar panels .

In this situation, many long-term cruisers devise a method of ‘dumping’ the extra energy by heating water for showers.

Do bear in mind if you’re planning to live aboard full time , then it’ll be a whole different story on cloudy days and during the winter, when inverter use might need to be knocked on the head entirely.

Continues below…

Eco friendly sailing: Best practice for green yachting

How easy is it to go eco friendly sailing? We look at the steps cruisers can take to minimise their…

How and where to go wild cruising in the UK

Planning to spend the night away from crowded waters can 
be truly rewarding but preparation is essential before you go…

Solar-powered boat crosses Atlantic

Then heads to UN climate conference

POWER DISCREPANCIES

There’s often confusion as to how much power you can harvest from a solar installation.

A PV panel is nearly always advertised stating its theoretical peak output power (Pw).

But in reality, on a yacht where there are limited areas in which to mount them, they will more likely produce a maximum of 60% of their peak output if mounted horizontally, increasing to 80% if tilted towards the sun and regularly adjusted.

The latter is rarely achievable on a boat, however, as even at anchor it can swing through an arc of 180° in wind or tidal shifts .

Flexible panels can be mounted on sprayhoods or awnings to add power when it’s needed at anchor or in harbour

INSTALLATION

Having trawled through hundreds of ‘deals’ to get the best price on the most efficient panels you can afford you now need to know how to install them to best fulfill your energy generation needs.

The output, even from the highest quality photo-voltaic array, will only be as good as the installation itself.

So following our guidelines should ensure you extract every last drop of energy from your investment.

PANEL MOUNTING

Sailing boats are not the ideal structure on which to mount wide, flat PV panels.

So before you go ahead and purchase what looks like the biggest and best, take a few minutes to decide on exactly where you can mount them, as this will affect what size and type of panels you should buy.

In many cases the first choice would be on an arch, davits or gantry aft, especially if you already have, or plan to fit one.

Dinghy davits, particularly on multihulls, can support a huge solar capacity

These allow a solid metal framework to be constructed that will be strong enough to take the heavier, more productive rigid PV panels.

You can also build in some form of adjuster to the framework that will allow the panels to be orientated towards the sun for the best performance.

With luck (or careful planning) a gantry will also keep them aft of the boom, thereby eliminating loss of output caused by boom shading.

The next most popular position for mounting the panels is on a cockpit sprayhood or bimini, although this will often mean using the flexible or semi-flexible panels, which are generally less efficient than the rigid ones for the same area.

ELEVATED MOUNTING

Alternatively, there are kits available for mounting panels onto lifelines, which can allow their elevation to be manually adjusted to a certain degree.

Pole-mounted panels can be used for maximum adjustability

Finally, panels can be fitted directly onto the deck by either gluing them down using mastic or attaching them onto a rigid support frame.

Once again you will probably need to use semi-flexible panels – especially if the deck surface is curved.

Rigid, glass-coated panels will obviously not be suitable for deck mounting in an area that is frequently walked over.

Don’t be tempted to drill through the panels, even along the edges, as this will invalidate the warranty and possibly damage the panel.

With solid panels, the ability to adjust the angle can add significantly to output

It might seem obvious, but the key to an efficient system is to avoid shading wherever possible.

It’s no good fitting expensive, high-efficiency PVs right under the boom as they’ll perform little better than the cheaper types.

Saying that, in good quality panels each cell will be isolated from the next by a series of diodes (one-way electrical valves), so that if one cell is shaded at least it won’t drag down the other cells within the same panel.

Older panels often didn’t have these, so the slightest partial shading caused the output of the entire panel to cease.

OVERHEATING

Another important factor that is often ignored when installing the panels is that of overheating.

If a PV panel gets too hot, which is quite likely if mounted directly onto a flat surface without an air gap behind, its output will drop quite noticeably.

To allow for some air circulation behind the panels it’s best to apply mastic adhesive in numerous large dabs.

This is best achieved by placing wooden spacer strips between the dabs until the mastic has completely cured, after which the spacers can be removed.

You might need some form of trim around one or more of the outside edges, though, if they are positioned where sheets and other lines might get caught under them.

Raising the panels up will also help water to drain off and thereby helping to avoid possible delamination from sitting in water for too long.

CHARGE CONTROL

A PV module cannot supply an electrical device directly due to the changeability of the sunlight, which in turns varies the current it can produce.

Therefore, it has to be connected to a battery, which stores and smooths its output.

Whatever the size of your solar array you will need to fit a regulator, or charge controller as they are now more commonly known, to the system in order to control the output and to help extract as much power from the panels as possible.

There are two types of PV charge controller.

The older designs, called Pulse Width Modulation (PWM) types, were fairly basic voltage regulators and simply output volts at just above battery level.

The latest controllers use Multi Power Point Tracking (MPPT) technology and can accept much higher input voltages (up to 240Vdc).

MPPT controllers can be up to 30% more efficient as they use the peak output of the panels to charge the batteries, even compensating for partial shading.

BEWARE FAKE GEAR

If you buy online do be careful to ensure you’re getting what you pay for.

There are a huge number of fake MPPTs out there, which are simply the much cheaper PWM dressed up with fake labels.

It’s hard to tell which is which, but the old adage of ‘if it looks too good to be true, it usually is’ makes good sense.

MPPT controllers are usually bigger and heavier than PWMs, but if in doubt call or email the supplier to discuss the pros and cons of their kit before buying.

If they’re not happy to chat and advise you then I would steer clear of their gear.

Some good MPPTs are made in China, but unless they have a UK supplier, I wouldn’t bother with them as you’ll have no follow-up advice.

To calculate what size controller you need simply divide the panel’s peak power in Watts (Wp) by the battery voltage, which will give you the maximum current (Amps) they could theoretically supply.

For example 240W/12V = 20A. Although it’s unlikely you’ll ever get near the peak output from any PV panel, it’s best to go for the maximum possible.

Induction cooking is now a reality on board, even without shore power

PV panels come with a short length of cable, usually around 1m long.

Some are supplied with MC4 connectors already attached but most only provide bare wires.

The latter can be easily extended using proper waterproof connections but thought must be given as to the current rating and voltage drop (usually max 3%) for the size of cable you intend to use.

If in doubt, bigger is better!

Panels can sometimes be ordered with the wiring on the back so that the cable can go straight below deck through a hole under the panel.

You may need to fit extra battery capacity if you want to run an inverter from solar charging

SERIES OR PARALLEL?

A commonly asked question is ‘should I wire my PV panels in series or in parallel?’

The simple answer is, if there’s any danger of frequent shading to one or more of the panels then install them in parallel.

If wired in series the shading of a single panel will drag down the output from all of the others in the same series.

PARALLEL IS PREFERRED

Most commonly, multiple panels are wired together in parallel to a single charge controller, with diodes protecting each panel from discharging the others should one become partially shaded.

With the advent of MPPT controllers, however, there can sometimes be a benefit to wiring two or more identical panels into a series bank, thereby presenting a higher voltage to the controller.

It’s worth noting that, like batteries, wiring PV panels in series increases the voltage only – the current capacity of the array remains the same as for a single panel.

‘Where’s the benefit of wiring them in series then?’ you might ask.

Well, the higher the voltage fed into the MPPT, the more consistent it will be with its output, which could, in some cases, prove more efficient than a parallel installation with PWM controllers.

It’s also likely to be necessary if you have a 24V domestic system.

SERIES WIRING

Series wiring is usually only done when the cable runs are long, as it helps negate the voltage drop caused by the resistance of the cable.

While a decent controller will have no problem handling the output from four or even five panels wired in series, it is often inappropriate for sailing yachts as shading just one of the panels will reduce the output of the entire series array.

If you need to do so in order to reduce cable runs then it’s best to split the panels between each side of the boat – a series bank on each side.

If you do this, then you would ideally fit a separate controller to each series PV bank and then connect their outputs together in parallel to the battery bank.

Note, however, that panels wired in series must all be the same types with an equal number of cells per panel.

Furthermore, the charge controller needs to be sized for the total of all panel voltages added together and the current rating of one individual panel.

Differently rated panels can be connected together in parallel but only if each panel has its own controller.

The outputs of the individual controllers can then be joined together to go to the battery bank.

BATTERY BANK QUESTION

Another frequently asked question is ‘Can I connect another charging source to the battery bank while the solar array is charging?’

The answer is yes.

Any decent PV controller will be protected against feedback from other charging sources.

Think carefully about where shade from mast, boom and rigging will fall. Credit: Graham Snook Photography

CABLE SIZE AND CONNECTORS

A frequent cause of reduced output from PV arrays is wiring that is too small.

The resistance of a wire conductor increases in direct proportion to its cross-sectional area, so go as big as is practicable for the least cable loss.

Each panel should be supplied with the correctly sized cables for its own maximum output.

But if you’re combining panels, either in parallel or in series, you will clearly need to rate the single feed cable to suit the maximum current available at theoretical peak solar output and to minimise voltage drop.

Likewise, the cable from the controller to the batteries should be sized to suit the controller’s maximum output current and protected with a fuse.

For outside it’s important to use exterior grade cable, which is double- insulated and UV-proof.

WEATHERPROOF CONNECTORS

And wherever possible use compatible weatherproof connectors (usually MC4) to those found on the panels rather than cutting off the plugs and hard-wiring them.

Field- assembly MC4 plugs are available, so you don’t have to drill large holes in the decks or bulkheads when feeding the cables through.

When joining more than one panel together try to use the approved multiway connectors; not only do they keep the wiring neat and tidy, but they also offer a greater contact area than budget terminal blocks.

If you have to use screw-type connectors make sure to fit proper ferrules to the wire first to avoid any stray wires in the multistrand shorting across the terminals.

When feeding a cable from above to below deck, try to go through an upright bulkhead where possible to minimise ‘pooling’ of water around the access hole.

Also, use a proper watertight deck seal that matches the cable you’re using.

If drilling through a cored deck you need to drill a larger hole first, fill it with epoxy resin and then drill the required size hole through the epoxy to ensure no water gets into the deck core.

Ideally, the charge controller should be mounted no further than 2m from the battery bank.

If you need to go further, you’ll require larger cabling to reduce the voltage drop.

A generous solar array will keep you self- sufficient indefinitely. Credit: Graham Snook Photography

CONTROLLER LOAD TERMINALS

There is often confusion over the ‘load’ output of a charge controller (often depicted by a light bulb) and what can safely be connected to these terminals.

Rarely explained in the manual, the load terminals should be pretty much ignored in a marine installation as the output on these terminals is usually very limited (10A max).

Some attach an LED light to them to indicate the controller is operating, but all your usual electrical loads should remain connected to the batteries with the battery terminals on the controller connected directly to that battery bank via a fuse.

It is possible, though, to control a high-current switching relay in certain conditions.

Parallel installation is more resilient to shading, but a series installation will increase peak charging outputs. A combination of the two offers some of the benefit of both

CIRCUIT MONITORING

Unlike most cheap PWMs, the majority of good quality MPPT charge controllers come with an alphanumeric LCD screen to let you know what is going on.

This can either be a remote display or simply one on the front of the box.

It’s obviously a lot better to have a proper numerical display than to rely on a few flashing LEDs to tell you when something’s not right.

So if your chosen controller doesn’t have one be sure to fit a battery monitor (the shunt type) into your solar circuit between the controller and the batteries.

It doesn’t have to be a very ‘smart’ monitor, just one that can display the voltage and current being supplied by the panels.

For smartphone addicts there are several wifi apps that will do the job remotely on your phone or tablet.

DEVICE PROTECTION

All good quality PV panels feature built-in diode protection between each cell to prevent a shaded cell from dragging down the productive ones.

In addition, there will be internal blocking diodes on the final output to protect the panel from polarity reversal and to ensure that the batteries can’t discharge back into the panel during the night.

The latter can be added externally, the former can’t, so check before you buy.

A fuse, rated just above the maximum current available, should be fitted between each panel and the charge controller.

Another fuse should then be installed between the charge controller’s output and the batteries.

In the case of multiple arrays, this second fuse will be rated higher than the individual panel fuses and should match the maximum current rating of the cable.

With this protection installed other charging devices can be connected in parallel at the battery, meaning the solar can be left connected even when you are hooked up to shore power and the battery charger is operating.

In some circumstances, however, this arrangement can affect the sensing of the battery by the charger, causing it to fall back into float mode.

If this becomes apparent it can be overcome by installing a manual/auto switch to disconnect the solar array when on shore power.

Check the flex of the solar panel is sufficient for your deck

EXCESS POWER DUMPING

A solar charge controller works by disconnecting the supply from the PV panels when the batteries are fully charged.

But for some full-time liveaboards in sunny climates that can be considered a waste, when the excess power could be put to good use – heating water, say.

This is commonly done using an inverter to supply AC power to the heating element.

Alternatively, you can now buy a 12Vdc element for your calorifier (hot water tank) and supply this directly from your battery bank.

Both of these methods would require a voltage sensitive relay (VSR) to disconnect the element should the battery voltage drop below a pre-set level.

Don’t expect boiling hot water, as there will probably only be enough spare power to take the chill off it before your battery bank reaches its lower threshold voltage.

A 600W/12V element will draw some 50A, from the batteries, whereas a 1kW AC element run through an inverter will need close to 100A.

A small, semi-flexible panel will be sufficient for keeping batteries trickle charged, but not for heavy use

RIGID, FLEXIBLE, OR SEMI FLEXIBLE?

Despite massive recent improvements in semi-flexible panels in recent years, the solid glass panels still offer a higher power density.

That said, they are heavier, more awkward to mount and can’t be walked on, so unless you have a dedicated gantry aft, you’re better off choosing the more rugged semi-flexibles.

Modules incorporating monocrystalline cells also have a better output than those with polycrystalline cells (that’s cells made from a single slice of silicon as opposed to layers of smaller pieces).

Output voltage also depends on the number of cells on the panel.

In the past this has commonly been 32, but now some 36 and even 40 cell panels are available.

That said, they’re larger, of course, so an array of interconnected smaller panels might be a better solution.

Module efficiency is now more often around the 20% mark, as opposed to 12-15% for older models and semi- flexible (up to 20° bend) are usually better than flexible (up to 180° bend).

A rigid panel is more efficient, but less robust

There are a huge number of panels on the market, but many use the same cells.

Sunpower Maxeon cells are exceptionally good, as are the Panasonic HIT range and LG, but they are pricey.

If the maker is offering a 25-year guarantee instead of a 3-5 year one, you can be pretty confident they’re good.

When it comes to charge controllers it’s definitely worth paying a little more for a decent MPPT.

A cheap PWM might be okay just to keep a small starter battery charged with a 30W panel, but the MPPT will give you much more when it comes to heavy service.

Victron are probably top of the range, while cheaper brands like MakeSkyBlue and EPever are also good value – but treat imports of unclear origin with care.

ABOUT THE AUTHOR

Duncan Kent has been evaluating and reviewing yachts and marine equipment for the past 30 years

Enjoyed reading this?

A subscription to Yachting Monthly magazine costs around 40% less than the cover price .

Print and digital editions are available through Magazines Direct – where you can also find the latest deals .

YM is packed with information to help you get the most from your time on the water.

• Take your seamanship to the next level with tips, advice and skills from our experts
• Impartial in-depth reviews of the latest yachts and equipment
• Cruising guides to help you reach those dream destinations

Follow us on Facebook , Twitter and Instagram.

photo© www.svdelos.com

Let us help you go solar aboard, start enjoying c lean, quiet & renewable po wer.

At Sun Powered Yachts we hope to inspire and inform yacht owners on the benefits of going solar with SunPower & Maxeon. We're here to answer any questions you may have. 

With a background in sailing & solar, and also from living off-grid for 11 years in Hawaii, we have the knowledge to help you with your solar install.  Find out more about us  

In 2021-2022 we spent 15 months as a family living aboard our sailboat, a Dufour 382 sailing from Corsica to Cancun and more recently to Florida & Bahamas.   An intrepid adventure of over 7,000NM visiting 12 countries along the way.  We're available for solar consultations with SunPower & Maxeon panels in stock in the USA ready to fulfill orders. 

Aloha, Katie & Lyall

+1 808 825 2670

info@sunpower edyachts.com

Join over 5,700 people receiving our quarterly email updates

Thanks! You will receive our next email update .  Follow us on Facebook  & Instagram for latest news

SunPower ® 100 Watt

Maxeon ®   a ir 3 30 watt.

SunPower ®  50 Watt

Maxeon ® 415 Watt -R (all black)

Maxeon ® 475 Watt

Maxeon ® 470 Watt

Choose your maxeon ® solar panel bundle, fixed frame panel bundles.

1x 415 Watt bundle

1x 470 Watt bundle

1x 475 Watt bundle

2x 415 Watt bundle

2x 470 Watt bundle

2x 475 Watt bundle

Visit our shop for flexible & fixed frame bundles*, *at sun powered yachts we only sell premium cosmetic quality sunpower® e-flex panels.  our inventory is warehoused in arizona, please visit our shipping policy  for full details  , 1% for the ocean, we are committed that 1% of your order with us goes directly to support the papahānaumokuākea marine debris proj ect ( pmdp ) in hawaii.  the 2024 clean up season began in april with a 19-day mission to midway atoll removin g  an incredible 70,080 lbs of marin e debris  .

Federal Tax Credits

Have you heard about the Federal Tax Credits that you could take advantage of for going solar on your boat?  Yes, your boat! 

Do you have a head, galley & bunk aboard? Then you may qualify and t he Federal Tax Credit has now gone back up to 30% of the total cost to put your solar system in place.

This can include solar panels, controllers, wiring, labor etc. and can now more easily include batteries - maybe time for that lithium upgrade to Battle Born

SunPower Advantage s

Silent power

Solar panel systems burn zero fuel and have no moving parts. They are clean and silent, producing no atmospheric emissions or greenhouse gases that are harmful to the earth.  Enjoy those quiet anchorages with no more noisy engine/generator running just to charge your batteries.

Easy install

The simple and easy installation of SunPower® E-Flex panels on your bimini, dodger, or deck, will reduce costs of adding an expensive davit or custom racking and mounting solution for traditional large & heavy fixed  frame solar panels.

Highest quality

Incredibly reliable and easy to maintain. With no moving parts, visual checks and servicing easily keep systems operating. Solar panels are robust & durable with a junction box designed with a high level of protection from dust & water ingress.

SunPower Solar Panel Installs

Follow us on Instagram @sunpoweredyachts

News & reviews.

Maxeon to open new factory in USA

Great news! Maxeon announced  in August 2023 that they will be opening a 3 Gigawatt factory in New Mexico. Construction is now set to begin Fall 2024 and so by 2026 that's high efficiency Maxeon solar panels being made right here in the USA! 

Read our news post for full details.

For sale - 'Blake' our Dufour 382

Are you looking for a boat already set up to go cruising?  We have our 2016 Dufour 382 GL 'Blake' listed for sale on Yacht World .  She is the adventure version with taller mast/deeper keel, 950W of SunPower flexible solar panels, a DC watermaker, new dinghy and plenty of safety gear.  Currently in Freeport, Bahamas.  For more details contact us directly

T: 808 825 2670

Check out our Install List  

We have added an Install List page to our website which currently has over 130 installs from our customers.  Get inspired by what other boat owners have added for SunPower & Maxeon solar panels. 

Maybe you own a Lagoon 400 or a Morgan 41 and wonder what panels might fit aboard, check out the list to see how other owners have gone solar aboard.

Calico Skies 3x 410W

Bill & Grace sail Calico Skies , a Sabre 36, and whilst in Mexico they installed 3x410W SunPower fixed frame solar panels as part of a major upgrade to their arch/davit system.  

Check out their YouTube episodes including  #177 to see how they get on adding 1,230W (or 1.23kW) of SunPower solar panels.

Calico skies install details

"We made 7.2kWh yesterday out of our panels, what an upgrade!" 

Bill & Grace

SV Delos 3x 410W + flex

Brian & Karin of SV Delos   installed 3x410W SunPower fixed frame panels when on the hard in Mexico ( YouTube Ep.407 ) 

Combined with their SunPower E-flex panels, which have been aboard for ~3 years ( YouTube Ep.262 ) they now have just under 2,00W of solar keeping them powered up in the Pacific - awesome! 

SV Delos install details

"Love our new 410W panels and they're the same size as the old 300W ones - woohoo!"

Brian & Karin

Sailing La Vagabonde 2x 470W + flex

Riley & Elayna of Sailing La Vagabonde have been working on their new Rapido 60' trimaran and added 2x470W Maxeon fixed frame panels. 

They also have 6x170W SunPower flex panels they can deploy when needed.  With a 48V battery bank these panels are wired in series  YouTube episode

SLV install details

"Thank you, the solar panels have been absolutely incredible."  

Riley & Elayna

Testimonials

"So now I generally

Don't bother hooking, up to shore power".

     Thanks for all the help in planning my solar project for my boat. The two 170W flexible panels fit well on my Bimini and now I generally don't bother hooking up to shore power.  Although I haven’t had any long trips since my installation I have done a few day trips. And even with fridge, radio, plotters, autopilot and occasional radar it seems that these panels are keeping up with my usage. The advice and service has been great.   Thanks again.

Jeanneau Sun Odyssey 469

"It is by far the best decision I made "

         I bought a solar system from Sun Powered Yachts in 2020. It is by far the best decision I have made for the electrical system on my boat. I would (and do) recommend Sun Powered Yachts to anyone looking to add solar to their boat.

Endeavour 33

"Terrific customer service, always responsive"

         The process of researching a solar solution for my Beneteau 41 was simplified & clearly understood once I discovered Sun Powered Yachts.  Terrific customer service, patient, always responsive with guidance and products that just work. Being a novice at setting up a solar system, I had many questions along the way, and the team at Sun Powered Yachts were always there to answers my questions and provide support.

Beneteau 41

Become a more sustainable sailor with SunPower® &  Maxeon® solar panels

Sunpower® solar videos, jodi endicott environmental art june 2024.

Our Beautiful Boat Home (FULL BOAT TOUR)

Mastering OFF-GRID Living: 4 Key Things Every Sailor Should Know ⛵️ Sailing Vessel Delos Ep. 441

New Feature: Prioritising solar or wind when on shore power Victron Energy

GOING SOLAR - Video by Profiles in Dust (2023)

Custom Double Flexible Solar Panel Mounting System (No Drilling, Welding, or Permanent Adhesive)

Practical Boat Owner

• Digital edition

Boat solar panels: Everything you need to know to get started

• David Berry
• October 13, 2021

Want to add some boat solar panels, or wonder how to make the most of those you already have? David Berry has some advice...

While it seems like a good idea to mount a panel on the coachroof the chances of it becoming shaded are increased. Here the mast or rigging can easily throw a shadow over at least part of the panel, seriously reducing its output. Photo: Catchlight Visual Services/Alamy

Keeping batteries topped up without resorting to running the engine is an ongoing problem for yachtsmen. Boat solar panels are an obvious option, not just in the Med but also around the coasts of the UK as the price of panels has fallen over the years.

But choosing them can seem a bit of a black art: after all, how can you possibly predict how much sun you’re going to get during the season, or how much power your panel will produce if it’s not exactly aligned with the sun? But provided you accept a statistical approach using established databases, then prediction is easier than you think.

Ultimately the only thing we need to know is the conversion efficiency, or, how much sun turns into electrical power. NASA do a trick: they use multi-layer panels where each layer responds to a different wavelength so the usual 20% or so is doubled.

Article continues below…

Battery maintenance for boat owners: How to look after your boat batteries

For all but the smallest and simplest of craft a reliable supply of battery power is essential to keep both…

What is insolation? How much power is reaching my boat’s solar panels?

The sun is 93 million miles away, give or take. Packets of energy called photons leave it and travel at…

And there is a new material called Perovskite which is also used to provide an overlay on the standard silicone panel and the tandem panel is claimed to convert up to 28% of the sun’s energy into electricity.

Don’t rush though, when I looked on Amazon for one I discovered even the books describing it cost around £100! The panels themselves seem to be still in development.

How much energy does my boat need?

The first step is to work out your boat’s energy requirements. All you have to do is add up all the energy in watt-hours used by each device on your boat, such as the fridge, lights, computers and so on.

Energy is power accrued over time, so if power is measured in watts, energy is watt-hours. This can be tricky, for example how long is your fridge running for? And how about overnight? How much energy do the instruments take? Or your computer?

You can measure the power by measuring the Amps and Volts and multiplying them together to get Watts, but somehow you need to come up with a table similar to the one below. Once you have your energy requirements worked out, I suggest you add a goodly margin for expansion and errors – at least 10%.

Energy requirement for Aderyn Glas over the course of a day. ‘Current’ is Amps. ‘Duty’ is the portion of the day the (12V) appliance is powered up. eg Fridge 4A x 12V x 12hr = 576Wh

Next, you need to decide how much of this requirement should be met by the boat solar panels. We sail our Moody 33 Aderyn Glas throughout the summer season from our base in Preveza, Greece, so our requirements are essentially those of liveaboard sailors.

We want the panels to be able to supply most of our power needs and allow us not to have to ruin the peace of a quiet anchorage by running the engine simply for charging.

Weekend sailors might be content with a small panel to recharge – over the course of a week – the energy used during a weekend’s sailing. Getting the balance right is important, especially if you want to install enough boat solar panels to more or less cover your power requirements.

David Berry’s Moody Eclipse Aderyn Glas has boat solar panels mounted on a stern gantry where shadows are greatly reduced

But will you get the quoted wattage from your panel? If the panel is a 100W panel, will you get 100W? Panels are rated as the electrical power produced under certain strict test conditions, and these are solar irradiation (called insolation) of 1,000W/m2 at 25°C and an atmosphere of a particular clarity. Do we ever get these conditions in practice? Well, yes, we do, but life is never that simple – in this article I explain about how to assess the real insolation over the course of a day in your chosen location.

Types of boat solar panel

Leaving aside the exotic new Perovskite panels, there are three types that you might consider – a choice that hasn’t changed in years.

There are amorphous panels (good in shady conditions but large for any given wattage), printed panels (manufactured with an inkjet printer but really low conversion efficiency) and crystalline panels either poly- or mono-crystalline.

The smaller amorphous panel is 15W and the larger crystalline panel is 100W. So the larger panel is approximately twice the area, but seven times the power

What type of boat solar panels should I fit?

This question is a bit of a red herring – in reality, the question should be ‘How much space do I have?’

The academic drive is to make panels that are more environmentally friendly, both to make and dispose of, and to reduce the cost per watt.

But ironically this has resulted in a much poorer conversion efficiency generation by generation, which is not helpful to sailors with a small area available to mount the panels.

These panels are printed on a continuous inkjet printer with the idea that they can effectively be an endless strip. The problem with that, though, is the current can build up and eventually burn out the connecting cables. Furthermore, they are no good for yachts because the conversion efficiency is so low so you’d need a battleship in order to have enough space!

So, back to the first generation: crystalline panels come in mono- or polycrystalline species, but they only differ slightly in cost per watt and efficiency.

Added to the mix is the flexibility aspect: flexible panels require a bit of clever manufacture, and this is passed on in higher prices.

Many sailors think flexible panels are a solution because they can be mounted on the deck or coachroof or even the bimini but I’ve not considered them because all those places seem to suffer from shading, more of which later.

A hypothetical energy balance. The red line is the clear-sky power that the panel could provide during daylight. The blue line is the power your boat requires. Light blue is surplus energy, where the panel is outputting more than the load, and dark blue is where the load is greater than the panel can deliver. When night falls, the boat’s energy needs have to be met by the battery. In daylight, the battery becomes a load for the panels as it is charged. The green line is a notional illustration of the state of the battery; it winds downwards when there’s a shortfall and upwards when there’s a surplus available for charging. In winter, the load profile will be different and the captured power will be lower.

So does this mean the default starting point for any installation is a rigid, crystalline panel? In short: yes!

Where should I install my boat solar panels?

If you’re just fitting a small panel to top-up batteries on a mooring, buy a cheap rigid panel and find places on your boat where you can tilt it to catch the sun’s rays for the majority of the day.

We do this during the winter in Greece, where we strap on 20W or so of car battery top-up panels, and it works well for us. Choose a spot that isn’t shaded for the majority of the day and this technique should serve you well.

Do the sums. I have heard of people whose batteries have been damaged by a constant high power being applied to an already charged battery, even through a regulator. My rule of thumb for trickle-charging is a panel wattage about 10% of the battery’s stated amp-hours, but that’s a guess.

Aderyn Glas is fitted with two monocrystalline panels which are rated at 100W apiece – they take the same space previously occupied by amorphous panels which could only muster 75W between them

If you spend more time on board and need to get the best from your panels, mono- or polycrystalline panels will give more power from the same space. We replaced our 75W bank of amorphous panels with 200W of monocrystalline panels in the same area.

But with the higher efficiency comes higher sensitivity to poor mounting conditions, so if you want the best from your panels you need to do your utmost to ensure they’re not shaded, and also that they are tilted as close to a right-angle to the sun as possible. This is why liveaboards often mount theirs on adjustable gantries at the stern or on the pushpit.

Intrinsic losses

Let me just revisit this: the relationship between the nominal power of a boat solar panel and what you really get. When the manufacturer quotes, for example, 100W for a panel, that is the expected output under test conditions.

Choose your site carefully – this coachroof panel will be shaded by the boom, reducing its output by a considerable margin

The test conditions are an insolation of 1,000W/m2 at 25°C. So a typical panel of half a square metre will receive 500W of insolation, then we multiply by the efficiency of 22% or 0.22 and you get roughly 100W. So if you get a sunny day that insolates your 100W panel at 1kW/m2 then you have the potential to get 100W output for a short time around solar noon.

But the energy over 24 hours will be below this owing to the declination of the sun over the course of the day. This can be partly remedied with a tracking panel, but as the sun declines the light has to pass at a more oblique angle through the atmosphere, hence losing power.

The insolation will also be affected by your latitude, and by any form of shading or scattering from atmospheric dust, haze or cloud. Another important intrinsic loss is that heat reduces a panel’s output by about 5% for every 10°C rise in temperature greater than 25°C. For this reason, it’s quite possible to get a higher output from a boat solar panel in cooler northern latitudes than on the Equator!

This is the comparison between an MPPT controller and a PWM type over a 30 minute periodSo you see what I mean when I say the question is all about how much space you have: the default option should be a crystalline panel because it has the best watt per unit area coupled with price per watt, and we only need to deviate from this simple first-generation solution if other factors are important.

Cost and efficiency

Since we’re only talking about crystalline panels the efficiency is always going to be around 20% and the cost less than £1/Watt.

There are a large number of suppliers out there now but I should stick to the well known names such as Kodak, Polaroid, LG, Panasonic and Victron.

For suppliers I would look at Amazon (of course) or, in the UK, Midsummer Energy which stocks not just panels but all the cables and bits you will need to fit them.

Victron MPPT controller

Other boat solar panel system losses

Losses in cables are proportional to the square of the current. The equation is P=(i x 2) x R where ‘i’ is the current in amps, R is the resistance in ohms and P is the power lost in watts. The voltage gradient from the high voltage at the panels to the lower one at the regulator is fixed by the cable resistance and current (Ohm’s law), which is in turn set by how sunny it is and the power required.

But the resistance is a matter of design. To minimise cable losses and prevent potential cable overheating, large-core cables are needed. Resistance is also proportional to the length of the cable, so long cables need to be even fatter than short ones. I tend to use car speaker cable which is fat and can insulate the 12V we need.

Of all the possible ways to lose power from a panel, this is the most significant. On a crystalline panel, even the stripe of a rope’s shadow can wipe out a huge amount of the potential output power. Why is this? The individual cells in a crystalline panel are wired in such a way that a cell which is in shadow and not producing will act as a sink for the power produced by the other cells it’s wired to, with the result that virtually no power escapes from the panels as a whole.

You must have a regulator. The job of the regulator is to throw power away. It does this to ensure the power passing on to the batteries or services is not too great for them to handle. Normally it does this by controlling the amount of power passing through it and hold the output voltage at some predetermined value such as the float charge voltage of 13.4V.

The value of the power it passes depends on the current required by the load: the sum of batteries, lights, fridge and so on that are sucking the current from the panels. If the fridge is on, for example, more power will flow through the regulator and it will throw less power away as heat.

Most common, older regulators use a pulse width modulation (PWM) system which is more efficient than simply controlling the output voltage. Maximum power point tracking (MPPT) devices provide more usable power by seeking the panel’s optimum power voltage although they are expensive.

Chief among the suppliers is Victron (avoid the so-called MPPT types from ebay, they are almost certainly not MPPT controllers). And if you have the room it might be better to spend the money on a larger boat solar panel than on an MPPT controller. This is what we’ve done on our canal boat, settling for a PWM type.

To the boat solar panel, the regulator is part of the load – a consumer of power – which is why the entry to the regulator is an appropriate place to measure the voltage and current if you want to see exactly how much is being generated by the panels.

What power do I really get from boat solar panels?

If you do the sums, the unavoidable losses on a new panel operating at 65°C (measured in full summer sunlight in Greece) are going to be in excess of 20% from the temperature increase alone. Our example 100W panel is therefore only putting out 80W, and that’s only for a few hours.

If you really need every scrap of power then you need to find a way to keep the panel cool, and you need to invest in an MPPT regulator. As the panel gets older its performance will drop off even more. All a bit depressing, isn’t it?

I have to say, though, that in our particular installation on Aderyn Glas we regularly get more than 10A from our 200W panels, and our highest recorded value was 170W, which suggests that these loss figures are conservative.

In reality, with a well set-up installation you can expect to get a maximum of 75% of the power you would expect from a continuously insolated panel operating at its rated power.

Why not subscribe today?

This feature appeared in the May 2021 edition of Practical Boat Owner . For more articles like this, including DIY, money-saving advice, great boat projects, expert tips and ways to improve your boat’s performance, take out a magazine subscription to Britain’s best-selling boating magazine.

Subscribe, or make a gift for someone else, and you’ll always save at least 30% compared to newsstand prices.

See the latest PBO subscription deals on magazinesdirect.com

SOU receives third $1 million state grant for solar arrays

(Ashland, Ore.) — The solar energy aspirations at Southern Oregon University have received another jolt, with news that the Oregon Department of Energy has approved a third round of state funding for SOU’s push to become the nation’s first public university to generate all of the daytime electricity that it uses. The latest $1 million grant will be used to install a battery storage bank at SOU’s Computer Science Building and a solar array in a nearby parking lot.

The university has now received a $1 million grant in each of the most recent three years from the state Department of Energy’s Community Renewable Energy Grant Program , along with a $2 million appropriation from Congress in December 2022. Part of the federal appropriation will likely be used to complete funding for the Computer Science Building projects, which will cost a total of $1.3 million.

“We are excited about these opportunities to further diversify SOU’s revenue, and to increase our on campus renewable energy and reduce our greenhouse gas emissions,” said Becs Walker, the university’s director of sustainability. “We also recognize the importance of energy efficiency, and are monitoring all buildings to identify potential improvements. A recent renovation project on Britt Hall improved our energy efficiency across campus.”

This year’s funding process for the Community Renewable Energy Grant Program was especially competitive, with the state selecting 34 of 75 applicants to receive a total of almost $18 million in grants. The program is intended to support planning and construction of renewable energy or energy resiliency projects for Tribes, public bodies and consumer-owned utilities.

SOU is currently working on solar projects – funded by the earlier grant, appropriations and $51,000 from the Associated Students of SOU’s Green Fund – at Lithia Motors Pavilion and The Hawk Dining Commons that will increase the university’s photovoltaic output from the current 455 kilowatts (kW) to a total of 848 kilowatts. The first project has added a 241 kW solar array to the 63 kW solar array already on the athletic pavilion’s roof, making it the largest rooftop solar array in Ashland. The second project, at The Hawk Dining Commons, is a solar array and battery storage bank that will enable SOU to support community resilience by providing power at The Hawk, if needed, in the event of an emergency.

SOU’s first solar canopy in a parking lot will be funded with money from the state Department of Energy’s second round of grants and the congressional appropriation. The first parking lot array will add 340 kilowatts of generating capacity, and SOU will be able to produce about 17% of the daytime electricity it uses when all three current projects are completed. That amount will increase when the Computer Science Building projects are also built out.

SOU has nine existing solar arrays , plus one at the Higher Education Center in Medford and a pole-mounted array installed in 2022 by a nonprofit on land leased from the university. SOU has added five arrays over the past four years, with funding from private investors, grants, the student government and university administration.

The university anticipates generating 100% of its own electricity by 2033, and is already planning for its next rounds of solar expansion. SOU is focused on being entrepreneurial in its approaches to revenue generation, and on energy independence and reducing greenhouse gas emissions. Its eventual energy independence will save the university at least $750,000 per year in utility costs, and each solar array that comes on-line results in an incremental reduction of the overall energy bill for campus.

• SOU News Home
• Campus News
• Academic Stories
• Alumni Spotlight
• Student Life
• Recognitions
• Prospective Students
• Current Students
• Graduate Students
• Financial Aid
• Academic Programs
• Virtual Campus Tour
• Campus Events
• SOU Athletics
• Oregon Center for the Arts
• Jefferson Public Radio
• Sustainability
• Press Releases

Joe Mosley – Director of Community and Media Relations Phone: 541.552.6719

• SOU News Archive