yacht solar panel gantry

THE FUTURE OF SOLAR ARCHES FOR SAILBOATS

Strong and stylish, optimised for solar panels, custom fit for your boat, made from stainless steel, complete solar power solution for your boat.

We produce and deliver customised, affordable and stylish arches for mounting solar panels on sailboats.

Many sailors have a dream of a sustainable power production on their boat. It gives you the freedom for long passages and visiting remote destinations without having to worry about electrical power. Most sailors will choose a solution with solar panels which will raise the question; where to place them on the boat.? To get enough capacity, most often the panels will need to be placed on a solar arch on the stern of the boat.

Having a solar arch mounted, will also give you the option to carry and hoist a dinghy from the integrated davits.

As a sailor, you used to have two options, when looking to mount an arch on your sailboat to carry solar panels and  a dinghy on the stern:

Buy a 100% standard product, which you then cut and drill so it fits onto your boat. This can be relatively cheap, but is definitely not pretty, since often the material is aluminium, so "normal people" are able to cut and drill without problems. It does not look great when the other tubes on your boat are most likely polished stainless steel.  

Find a local blacksmith and ask them to make a one-off arch. That gives you maximum freedom to decide design (with the potential to mess it up, if you don't know what you are doing). This is always a VERY costly affair, as most one-off products are.

We have figured out a way to combine the best of both...

We have developed an advanced, yet simple process for our customers to perform the necessary measurements on their own sailboats, which we then use to finish a semi-standard product.

The result is a beautifully designed, structurally thought through stainless steel arch, optimized for carrying solar panels and a dinghy.

WE’RE HERE TO MAKE SAILING MORE COMFORTABLE & MORE FUN

Solar * hardtops * enclosures * lithium batteries, turnkey solutions for catamaran owners window.datalayer = window.datalayer || []; function gtag(){datalayer.push(arguments);} gtag('js', new date()); window.datalayer = window.datalayer || []; function gtag(){datalayer.push(arguments);} gtag('js', new date()); gtag('config', 'g-qlvmkgnq8n'); gtag('config', 'aw-757052530'); gtag('event', 'conversion', { 'send_to': 'aw-757052530/fxdpcpndoycyeplo_ugc', 'value': 1.0, 'currency': 'usd' });.

CHECK OUT THE NEW BALI CATSPACE SOLAR HARDTOP & GANTRY!

Joins our bali catamarans lineup.

FOLLOW ON FACEBOOK

Happy to announce the lagoon 46 & 50 hardtop - perfect for mega solar.  and our latest- lagoon 42 hardtop & gantry. adds to our lagoon hardtop lineup for the 450, 440, 410, 400, 380 & 500..

How about a quote?  Contact us at [email protected]  888-769-7677 Name * Model & Size Shipping Location Email * Solar Interests Me Solar Interests Me Yes Indeed Kind Of Not At All Question? Click to Submit .inbound-button-submit{ font-size:16px; }

Check out our latest fountaine-pajot hardtops for  the aura, tanna, astrea, helia, lucia, elba, saona & isla.

I have a Dedicated Marine hardtop on my Lagoon 450F based in the BVI – very well made and functional piece of kit that transforms the flybridge experience. Ours was fitted with lights and solar panels and the access to the boom is useful for easily tidying up the main in the stack pack. Overall – a great aftermarket add to the Lagoon 450, I am sure it will be the same for the Lagoon 46! Also, I worked with Chris Spencer again whilst he project managed some post IRMA repairs to my 450 in Florida. What a great guy to work with – one of the best!

– graeme mcavoy, owner of lagoon 450f ariadne, the lagoon 450f – access to the main.

Before I bought FreeWill (2018 Lagoon 450F) I’d never sailed a boat where you could not get to the main. Chris Spencer and Dedicated Marine solved that problem!!

How much power does the solar gantry put out.

Thought you might be interested to know that the panels on our solar gantry put out 375 watts each yesterday during the mid day sun while running my high load watermaker, fridge/freezer/etc, and recharging the AGM’s in bulk mode. This is according to the Victron Bluetooth app.

We highly recommend biminihardtop (chris spencer) for quality product and installation at a fair price and no bs like the other catamaran specialty companies in south florida, the sorensens, lagoon 450s.  1125 watt solar gantry, lagoon flybridge hardtop.

Yeah cheers for Chris and Dedicated Marine – we have the hardtop on our Lagoon 440 Baja Fog and wouldn’t have it any other way!

John & monique boucher, lagoon 440 baja fog.  sausalito & baja california..

What Experts Have to Say: Need A Rigid Hardtop Bimini For Your Catamaran?

From the  CATAMARAN GURU  team:

Dedicated marine, inc . in fort lauderdale can custom-make a rigid hardtop catamaran bimini for you, a life-long sailor with solid credentials in boat-building and repair, chris spencer recognized a gap in the marine industry for hardtop biminis for catamarans. most production catamarans do not come with a hardtop bimini or it is a very expensive factory option. so chris figured out how to fit top quality biminis aftermarket at a reasonable price. he developed a line of hardtop biminis for several popular cruising catamaran brands and models and is now the premier bimini go-to guy., benefits of catamaran bimini hardtops, adding a bimini hardtop to your sailing catamaran offers lots of benefits:, shelter from rain and sun, a safer solid boom access point, a way to install an enclosure, place to install solar panels., dedicated marine offers beautiful ergonomic bimini hardtops for leopard, lagoon, and fountaine pajot catamarans. and manufacturing is right here in the united states. the catamaran biminis superbly fit the lines of your boat and are easily installed.  the aftermarket products are in line with the high quality of the boats. the biminis are designed to enhance the already well-appointed catamarans., dedicated marine is popular globally with catamaran owners whether they are readying for for circumnavigation, charter, living aboard, or just some well-deserved limin’. check them out, ask about accessories such as aft phifertex screen and front windscreen. they offer solar solutions as well., contact  [email protected]  or call  888.769.7677  for details. connect with them on  facebook “biminihardtop”, from your guide to all things catamaran: the latest on catamaran news, sailing events, buying and selling tips, community happenings, webinars & seminars at www.catamaranguru.com, happy lagoon 46 clients in australia.

Hi Chris, we officially take possession of our Lagoon 46 tomorrow and saw your Hardtop today and it looks fantastic with the Solar on top. We are so glad we decided to go with yours instead of the factory option. The speakers are incredible. I think you may hear my music from down under. The lights are great also so thank you and the boys (@VesselTec) have done a great job fitting it. We are just incredibly proud of our boat and will happily promote your hardtop. Thanks again! Sonia P.

Best upgrade for lagoon 380, the best upgrade we could ever do for our lagoon 380. not only fits it straight onto the bimini frame but also gives much more area all around, making the covered area a lot bigger. sail handling is now safe in all conditions., tim hamel, lagoon 380, upgrade your catamaran.

THE DEDICATED MARINE BIMINI HARDTOP

Experience the enhanced comfort and space provided by a dedicated marine bimini hardtop, expertly designed to complement the contours and lines of leopard catamarans & the lagoon 380, 400, 410, 440, 450, 500, 46 & 50., latest projects: lagoon 46 & 50, fountaine-pajot astrea 42, saona 47, elba 45 plus bali and beyond just catamarans for solar & marine aftermarket requests..

 FUNCTIONAL AMENITIES

Wider coverage athwardship creates more space for weather protection for guests to comfortably sit with helmsman; sailors will enjoy useful sturdy access to boom; led lighting, helmsman’s window and handrails..

HIGHLY ADAPTIVE

Permits easy adaptation for shades, electronics, “green” technology: customers like the added space afforded for dodgers, speakers and electronics integration, as well as a perfect spot for solar panel mounting..

ATTRACTIVE TRANSFORMATION

Expertly constructed in appreciation of the original design of the boat. transforms the lagoon flybridge into a “comfortable” skipper zone with 6’4” height clearance..

INNOVATIVE TECHNOLOGY

Only the highest quality materials are used in our composite constructed hard tops and associated products..

CONVENIENT INSTALLATION

Our bimini hard tops are easily shipped and  have been delivered from our base in florida to locations all over the us, the caribbean, europe & asia. straightforward instructions can allow for an easy self-installation..

INCREASE THE VALUE

Not only to your time onboard but to the resale value of your boat. as seen with the increase in number of hard tops installed on the leopard line, a premium is placed across the board on these boats..

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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.

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• Construction
• Optimisations
• Performance
• Equipment care
• Provisioning
• Keeping afloat
• Precautions

A simple and effective solar panel implementation

What is the issue, why address this, how to address this.

• • Integrated series diode in the panel - Most of the solar panels have a diode to block the discharge of the battery.
• • A series diode in the charge controller - This function facilitates a unidirectional flow of current from the solar panel to the battery blocking the reverse flow.
• • Fit a specific diode during the installation of the panel.

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Image courtesy of Sun Powered Yachts

Navigating the Seas of DIY: A Sailor’s Guide to Solar Panel Installation

In the world of sailing, mastering the art of boat maintenance is as essential as hoisting the sails themselves. For seasoned sailors and newcomers alike, embarking on a DIY project to enhance their vessel can be both rewarding and practical. From routine checks to transformative upgrades, here’s a comprehensive look at a DIY project that sailors can undertake to ensure their boat is shipshape and seaworthy.

Project Title: Installing a Solar Panel System

With a growing emphasis on sustainability and energy efficiency, installing a solar panel system on a boat has become an increasingly popular DIY project among sailors. Not only does it offer the convenience of generating electricity on board, but it also reduces reliance on traditional power sources and minimizes environmental impact.

Marine solar panels are crafted to endure harsh marine conditions, using corrosion-resistant materials like aluminum frames and tempered glass. They’re compact and lightweight, fitting well on boats with limited space and can even flex to fit curved surfaces. Products such as the 140 Watt Flexible Marine Solar Panel from Sun Powered Yachts offer 140 Watt Semi-flexible Marine Solar Panels that are ideal for mounting on a bimini top or a curved deck surface. These panels offer diverse mounting options, with specialized hardware for secure attachment. Marine Solar panels feature enhanced waterproofing, often meeting IP67 or IP68 standards and include safety features like overcharge protection. Across the board, marine solar panels ensure reliable and efficient power generation for boats and yachts, contributing to sustainability and energy independence.

Materials Needed:

• Solar panels
• Charge controller
• Battery bank
• Mounting hardware
• Wiring and connectors
• Tools (drill, screwdriver, wire cutters, etc.)

Step-by-Step Guide:

• Assessment and planning:  Begin by assessing your boat’s layout and determining the optimal location for mounting the solar panels. Consider factors such as sun exposure, available space and accessibility. Plan the layout of the system, including the placement of panels, controller and battery bank.
• Selecting solar panels:  Choose high-quality marine-grade solar panels designed to withstand the rigors of marine environments. Consider factors such as wattage, size and efficiency to meet your energy needs.
• Mounting solar panels:  Install mounting brackets or racks on the boat’s deck or cabin roof using appropriate hardware. Ensure that the panels are securely attached and positioned at an angle to maximize sun exposure.
• Wiring and connection:  Connect the solar panels to the charge controller using suitable wiring and connectors. Follow manufacturer instructions and adhere to proper safety practices. Route wiring neatly and securely, avoiding potential hazards or obstructions.
• Installing charge controller:  Mount the charge controller in a well-ventilated and easily accessible location. Connect the controller to the battery bank, ensuring correct polarity and wiring configuration. Set up any additional features or settings according to manufacturer guidelines.
• Connecting battery bank:  Install the battery bank in a designated compartment or storage area, securely fastening it to prevent movement. Connect the battery bank to the charge controller, fuse box and onboard electrical system.
• Testing and commissioning:  Once the installation is complete, conduct thorough testing to ensure the system functions properly. Verify that solar panels are generating electricity and charging the battery bank efficiently. Test all electrical connections and components for any signs of malfunction or irregularity.
• Maintenance and monitoring:  Regularly inspect and maintain the solar panel system to ensure optimal performance and longevity. Clean panels periodically to remove dirt, debris, or salt buildup. Monitor battery voltage, charge levels and system operation to address any issues promptly.

Embarking on a DIY solar panel installation project can empower sailors to harness the power of the sun and reduce their environmental footprint while enhancing onboard comfort and convenience. With careful planning, proper installation and ongoing maintenance, sailors can navigate the seas with confidence and sustainability, one solar panel at a time.

Additional Resources:

• Online tutorials and guides
• Marine electronics retailers
• Boatbuilding and maintenance forums
• Professional marine electricians or technicians for consultation

Editor’s Note:

While the DIY tips and projects outlined in this article offer valuable insights and guidance for boat maintenance, it’s important to emphasize that they are intended as suggestions and recommendations. Every boat is unique, and the scope of maintenance and repair tasks may vary depending on factors such as vessel size, age and configuration.

Boaters should exercise caution and discretion when undertaking DIY projects, especially those involving electrical systems, structural modifications or other complex tasks. Prioritize safety at all times and consult professional marine technicians or experts when in doubt.

Additionally, The Log recommends that readers conduct thorough research, seek multiple sources of information and consider their own skill level and experience before attempting any DIY projects. While these projects can be rewarding and cost-effective, they should never compromise the safety or integrity of the vessel.

Ultimately, the goal of DIY boat maintenance is to empower boaters to take an active role in caring for their vessels and enjoying the maritime lifestyle to the fullest. Whether tackling minor repairs, upgrades or routine maintenance tasks, boaters should approach DIY projects with diligence, patience and a commitment to quality craftsmanship.

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Yacht Solar: Exploring the Advantages of Flexible Solar Panels for Boats

When it comes to sailing the open waters, boat owners are constantly seeking innovative ways to enhance their boating experience while being mindful of the environment. One such breakthrough in marine technology is the utilization of flexible solar panels for boats. In this article, we will delve into the world of marine solar panels, discussing their benefits, applications, and the various options available in the market.

Sailing enthusiasts are increasingly turning to flexible solar panels as a viable solution to power their boats sustainably. These innovative panels offer significant advantages over traditional rigid solar panels, making them a popular choice among boat owners worldwide.

1. Understanding Flexible Solar Panels for Boats

1.1 what are flexible solar panels.

Flexible solar panels, also known as thin-film solar panels, are made of lightweight and flexible materials such as amorphous silicon. This flexibility allows them to conform to various curved surfaces on boats, making them an excellent choice for marine applications.

1.2 How Do Flexible Solar Panels Differ from Conventional Panels?

Unlike conventional solar panels that use rigid crystalline silicon cells, flexible solar panels use thin-film technology, which makes them more versatile. Traditional panels are bulkier and heavier, while flexible panels are lightweight and easy to install.

1.3 The Advantages of Using Flexible Solar Panels on Boats

The benefits of flexible solar panels on boats are manifold. They are lightweight, durable, and resistant to impacts, making them ideal for marine environments. Additionally, their flexibility allows them to fit on curved surfaces, maximizing the use of available space on boats.

2. Addressing Rust Concerns in Marine Solar Panels

2.1 the impact of rust on traditional solar panels.

Traditional solar panels are often mounted using metal brackets or frames. In marine environments, these metal components are susceptible to rust due to exposure to saltwater and humidity. Rust can compromise the structural integrity and efficiency of the panels.

2.2 Why Flexible Solar Panels are Rust-Resistant

Flexible solar panels do not require metal brackets for installation. As a result, they are not as vulnerable to rust as their rigid counterparts. This advantage extends the lifespan of flexible panels and ensures optimal performance even in corrosive marine conditions.

3. Empowering Boats with Solar Panels and Batteries

3.1 combining solar panels with battery systems.

Integrating solar panels with boat batteries creates an independent and sustainable energy system. Solar panels generate electricity during the day, which can be stored in batteries to power various onboard appliances and equipment, even during cloudy or nighttime conditions.

3.2 Advantages of Using Solar Panels for Boat Batteries

Using solar panels for boat batteries reduces the reliance on traditional power sources, such as generators or shore power. This not only cuts down operational costs but also reduces noise pollution and emissions, promoting eco-friendly boating practices.

4. Exploring Flex Solar Panels for Marine Applications

4.1 the versatility of flex solar panels.

Flexible solar panels can be installed on various boat surfaces, including the deck, hull, and bimini tops. Their lightweight and pliable nature allow them to adapt to the unique contours of different boat designs.

4.2 Installing Flex Solar Panels on Different Boat Surfaces

Boat owners can install flexible solar panels using adhesives or by sewing them into canvas materials. This installation flexibility offers convenience and ensures a seamless integration with the boat's aesthetics.

5. The Rise of Flexible Solar Panels in the UK

5.1 marine flexible solar panels in the uk.

The UK, with its extensive coastline and thriving boating community, has seen a surge in the adoption of flexible solar panels. Boat owners are increasingly recognizing the long-term benefits of harnessing solar power for their marine activities.

5.2 Embracing Sustainable Boating Solutions

The popularity of flexible solar panels in the UK reflects the growing awareness and commitment to sustainable boating practices. As environmental concerns mount, the marine industry is actively seeking eco-friendly solutions to minimize its carbon footprint.

6. The Convenience of Boat Solar Panel Kits in the UK

6.1 all-in-one boat solar panel kits.

Boat solar panel kits offer a convenient solution for boat owners looking to embrace solar power. These kits come with all the necessary components, including panels, mounting hardware, charge controllers, and connectors, making installation hassle-free.

6.2 Harnessing Solar Energy Effortlessly

Boat solar panel kits provide boat owners with a simple and effective way to harness solar energy. By generating electricity from the sun, boaters can extend their time on the water without worrying about depleting conventional power sources.

Read our top notch articles on topics such as sailing, sailing tips and destinations in our Magazine .

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7. Understanding the Issue of Panel Rust

7.1 common causes of panel rust.

Panel rust in traditional solar panels is primarily caused by exposure to moisture and salty air. It can lead to corrosion and decrease the efficiency of the panels over time.

7.2 Preventive Measures and Solutions

Flexible solar panels, being less prone to rust, require less maintenance. However, boat owners can further protect their panels by choosing anti-corrosive mounting options and performing regular inspections.

a8. Harnessing the Power of 12V Solar Panels for Boats

8.1 the advantages of 12v solar panels.

12V solar panels are a popular choice for boats due to their compatibility with standard marine battery systems. They are easy to install and can efficiently charge 12V batteries.

8.2 Enhancing On-Board Energy Efficiency

By installing 12V solar panels, boat owners can optimize their onboard energy consumption and reduce the reliance on engine-driven charging methods, saving both fuel and money.

9. The Best Solar Panel Kits for Boats in the UK

9.1 top picks for boat solar panel kits.

Several reputable manufacturers offer high-quality solar panel kits designed specifically for marine applications. Researching and comparing different kits can help boaters find the best fit for their needs.

9.2 Factors to Consider When Choosing Solar Panel Kits

When selecting a solar panel kit, factors such as wattage, efficiency, and durability should be taken into account to ensure a reliable and long-lasting solution.

10. Enjoying the Sun with Boat Sun Power

10.1 embracing solar energy for recreational use.

Solar power enables boaters to enjoy recreational activities without the noise and fumes associated with traditional power sources. It opens up new possibilities for leisurely and environmentally-conscious boating.

10.2 The Pleasures of Environmentally-Friendly Boating

Boat sun power offers a cleaner and greener way to explore the waters, preserving the marine ecosystem and contributing to sustainable tourism.

11. Exploring Marine Solar Panel Kits

11.1 preparing your boat with solar panel kits.

Installing marine solar panel kits requires careful planning and consideration of the boat's layout and energy needs. Consulting with experts can ensure a well-designed and effective solar power system.

11.2 Advantages of Customizable Marine Solar Panel Kits

Customizable marine solar panel kits allow boat owners to tailor the system according to their energy requirements and space limitations. This customization maximizes energy output and overall efficiency.

12. Sailing the Future: Solar Sailboats

12.1 the concept of solar sailboats.

Solar sailboats take sustainability to new heights, utilizing large solar panels to power electric propulsion systems. These futuristic vessels offer emissions-free and silent sailing.

12.2 Eco-Friendly Sailing with Solar Power

Solar sailboats pave the way for eco-friendly yachting, promoting renewable energy use and reducing the environmental impact of maritime travel.

13. Optimizing Sailboat Solar Panel Mounts

13.1 choosing the right solar panel mounts for sailboats.

Selecting the appropriate solar panel mounts is crucial for maximizing energy production. Properly positioned panels receive the maximum sunlight exposure throughout the day.

13.2 Ensuring Optimal Sunlight Exposure

By strategically installing sailboat solar panels, boat owners can capture more sunlight, ensuring a steady flow of clean energy for their sailing adventures.

14. Sailing with Solar Power: Harnessing the Sun

14.1 how solar panels enhance boat efficiency.

Solar panels offer boat owners a reliable and renewable power source, reducing the reliance on traditional fossil fuels and enhancing overall energy efficiency.

14.2 The Future of Solar-Powered Sailing

As technology advances and renewable energy becomes more accessible, the future of solar-powered sailing looks promising, with boats becoming even more eco-friendly and sustainable.

15. Finding the Best PV Panels for Boats

15.1 understanding photovoltaic panels.

Photovoltaic (PV) panels are the heart of any solar power system. Understanding their efficiency and construction is essential for selecting the best PV panels for boats.

15.2 Selecting High-Quality PV Panels for Boats

High-quality PV panels offer better performance, durability, and longevity. Investing in top-tier panels ensures a higher return on investment and a more eco-friendly boating experience.

Embracing solar technology in the form of flexible solar panels offers boat owners a clean, sustainable, and cost-effective way to power their vessels. The advantages of flexible solar panels, such as their rust-resistance, installation flexibility, and efficiency, make them an ideal choice for marine applications. As the world seeks greener alternatives, the future of boating lies in harnessing the power of the sun, enabling sailors to embark on eco-friendly adventures on their solar-powered yachts.

So what are you waiting for? Take a look at our range of charter boats and head to some of our favourite  sailing destinations.

FAQs: Flexible Solar Panels for Boats

Yes, flexible solar panels are designed to withstand the harsh marine environment. Their durability, impact resistance, and rust-resistance make them ideal for boat applications.

While flexible solar panels can power several appliances, it's essential to assess your energy needs and consider battery storage capacity for consistent power supply.

No, solar sailboats rely solely on the power generated from their solar panels to operate their electric propulsion systems, making them completely emissions-free.

Yes, the flexibility of these panels allows them to conform to various boat surfaces, including curved ones, providing multiple installation options.

I am ready to help you with booking a boat for your dream vacation. Contact me.

Denisa Nguyenová

• Yachting World
• Digital Edition

Wind, water and solar power: how alternative energy has been transformed

• July 15, 2015

State-of-the-art solar power, wind and water generators have transformed the efficiency of alternative power sources. Can we say goodbye to diesel? Rupert Holmes investigates

Imagine a future in which there is never any need to fill up with diesel, buy gas, or top up water tanks and the only constraints are those of needing to stock up with food and maintenance of the boat itself.

It’s a scenario that’s much closer than many realise. The past decade has seen an accelerating pace of change, with technologies that appealed only to a minority, or were prohibitively expensive, now firmly entering the mainstream.

It’s already more than five years since the first of Gideon Goudsmit’s 44ft African Cat cruising catamarans sailed from South Africa to the Netherlands without using fossil fuel, even for cooking, watermaking and hot water.

Although many would baulk at the boat’s 80-mile range under power, this is not a quirky vessel in any other respect – it’s a spacious, fully fitted-out, comfortable cruising catamaran with a high level of equipment. In addition to solar and wind generators providing electrical power for the lightweight design, the boat’s electric propulsion motors were configured to be used as generators when under sail.

And it was by no means the first to do this. When Francis Joyon set the fastest time for a solo circumnavigation in 2007/8, his 80ft trimaran IDEC ll did not have a diesel generator. Similarly, Raphael Dinelli completed the 2008/9 Vendée Globe race without using any fossil fuel.

While few owners aspire to this level of self-sufficiency, incorporating some of these ideas can improve reliability and convenience for more conventional yachts, and may also reduce costs. Perhaps the most persuasive reason of all to fit additional means of generating power is that the presence of multiple charging systems improves a boat’s reliability by introducing a degree of redundancy – if one system fails much of the charging capacity remains intact.

Combining several different technologies can also balance the pros and cons of different power sources.

Thin film solar

A new development that could be the answer to the African Cat’s short range under its electric motors is extremely flexible giant solar panels that can be attached to sails, or even incorporated into the laminate. The durability of this technology was demonstrated at the end of last year by Daniel Ecalard, who used a pair of 3m 2 panels near the head of his mainsail to provide the electrical needs of his Open 50, Defi Martinique , during last year’s Route du Rhum race.

During the race the system stood up to a gale in the Bay of Biscay, in which ten per cent of the fleet retired, and survived the 25-day Atlantic crossing, during which Ecalard logged 4,677 miles, intact.

The system, named PowerSails, was developed by Alain Janet, owner of UK Sailmakers France. Each square metre of the panel is capable of generating 100 watts and, according to Janet, does not need direct sunlight to generate electricity: “In fact, the panels on the sail opposite the sun will generate 30-40 per cent of their maximum output with the indirect and reflected light,” he says.

These panels are made from film that’s 65 microns thick and weighs 100 grammes per square metre. This technology can also be used in other applications – a cockpit bimini shade, for instance, that could generate 1kW on a 50ft yacht.

Prices start at around £700 per square metre of panel, though this is expected to fall as production increases.

Mainstream markets

Janet has produced sails for a Dehler 39 in which a sizeable solar panel is laminated to the mainsail. The technology has also been harnessed by production boatbuilder Arcona, which has announced a version of its 38-footer equipped with an electric engine/regenerating system, sails with solar panels and a big bank of lithium ion batteries.

The boat debuted to great acclaim at this year’s Helsinki boat show, where it won the boat of the show award.

The solar panels in the mainsail are of sufficient size to generate an average of 1,000 watts of power, and the boat has a further 1,000 watts of solar panels. This is sufficient to drive it at four knots under power during daylight hours without taking any charge from the batteries.

Solar power

Almost every aspect of this sector has seen enormous development over the past decade, with worldwide installed capacity having grown by 3,000 per cent since 2005. The resulting economies of scale mean prices have tumbled, while funds are continuing to pour into research and development.

Panels are becoming progressively more efficient, with the best commercially available units now having an efficiency of around 25 per cent, although double that has been achieved in laboratory conditions.

At the moment the thin film panels mentioned above are around 12-14 per cent efficient, but in the future we can expect all types of solar panel to become smaller in area for a given output.

In addition, today’s panels are less susceptible to output drops when in partial shade and give good performance in cloudy conditions. This makes mounting panels on the coachroof, rather than a cumbersome gantry, an increasingly viable option.

Currently solar sells for a very wide range of prices, with most marine grade panels priced from around £200 to well over £500 per 100 watts.

Solar Pros:

√         Improving technology with reducing prices

√         Suitable for a wide variety of boats and conditions

√         Proven ‘fit and forget’ reliability

x         Many boats have insufficient space for a enough conventional solar panels

Hydro generators

The transom-mounted generators, such as those produced by Watt & Sea, originally came to prominence in the IMOCA 60 fleet, with the 2008 Vendée Globe race used as a gruelling testbed for the prototypes. They are capable of producing large amounts of power with minimal drag and can be lifted clear of the water when not in use.

The company’s cruising units are rated at either 300 or 600 watts, depending on the model chosen. The larger of these produces 120 watts of power amps at just five knots of boat speed, rising to more than 250 watts at 7.5 knots.

Over a 24-hour period that represents a significant amount of power that could alone run the majority of systems aboard many 50-60ft yachts, including watermakers, pilots, lights, electronics, refrigeration and water heating.

On the downside, hydro generators are relatively expensive compared with solar and wind generators, with Watt & Sea’s prices starting at a little over £3,000. Moreover, they are potentially vulnerable to damage when docking. The latter can be a particular problem in the Mediterranean, where most mooring is stern to the dock.

The Sail-Gen from Eclectic Energy (from £2,000) or the towed Aquair (a little over £1,000) from Ampair are more economic, though less convenient, alternatives.

Another option is a hybrid drive system with a regenerating function via the boat’s main propeller. Advantages include an absence of peripheral parts attached to the transom that may be susceptible to damage, or detract from a yacht’s aesthetics.

√         High power output

√         Impressively low drag

x         Transom-mounted types are expensive

x         Vulnerable to damage

x         Only works when the boat is underway

x         Impeller of transom-mounted models may leave the water if boat is pitching in a head sea

x         Towed type difficult to deploy and recover

Methanol fuel cells

These small, lightweight units have many attractions for use on board. Most are designed to monitor battery state constantly and automatically start charging once the voltage falls to 12.2V. They are almost silent in operation, with carbon dioxide and water the only exhaust products.

Output ranges from around 3 to 9 amps and more than one unit can be used to achieve higher charge rates. Given that a fuel cell can, in theory, run for 24 hours a day – unlike a marine diesel generator, which is more usually used for only two or three hours – a fuel cell can pump out a useful amount of power, despite the low amp hour rating.

On the other hand the long-term cost of ownership is a drawback. With retail prices of around £2,300-5,000 they are relatively expensive to buy, although installation costs are minimal. Additionally, the platinum catalyst has a finite life of around 5-8,000 hours. As this is by far the most expensive element, it’s clear that fuel cells aren’t yet up to providing power 365 days a year for long-term use.

A further problem is with the fuel, which to achieve the purity required is expensive and generally only available from specific outlets.

At the moment it looks as though fuel cells have more cons than pros for many yachts, although there are some circumstances in which they may make sense. For instance, they are popular on long-distance short-handed raceboats. A fuel cell may also be useful on a boat with a hydro generator that is self-sufficient on power while on passage, but may need an occasional boost when at anchor for long periods to supplement solar and wind charging.

√         Unobtrusive, clean and quiet

√         Easy installation

x         Long-term ownership and operating costs

x         Fuel not universally available

Wind generators

For several decades these were de rigueur for serious cruising yachts. On paper a decent-sized unit is capable of generating the entire needs of a 45-50ft yacht. However, they also have a number of drawbacks, the most commonly cited being noise and vibration in strong winds.

In addition, most cruising routes maximise time spent sailing downwind, which reduces apparent wind strength, which in turn dramatically reduces the output of a wind generator. Similarly, generating power in many anchorages can also be problematic, as the very shelter sought by the skipper also means that wind speed is generally significantly reduced.

Nevertheless, wind generators can be useful in some circumstances; the important thing is simply to recognise their strengths and weaknesses.

Prices range from small units producing just four amps or so for less than £400 to upwards of £2,000, although for most medium to large yachts £1,400-1,900 will buy a suitable system.

√         Capable of producing plenty of power in a strong breeze

x         Noisy and creates vibration

x         Output severely reduced in sheltered anchorages and when sailing downwind

x         Can be bulky and cumbersome

Typical daily power outputs

Typical power inputs for 12V systems (divide the ah figures by 2 for 24V systems)

Assuming the panels are mounted in an unshaded position, each 100W of rated capacity can be expected to produce, on average, around 33ah of charge per day during the UK summer.

For a yacht averaging 150 miles per day (6.25 knots), Watt & Sea’s 300W cruising model will produce around 175ah per day. This rises to around 275ah per day at an average speed of seven knots, but falls to 120ah per day at five knots average.

These have by far the biggest range of potential outputs, with many units averaging less than ten per cent of their rated output over a full year. That would equate to a mean of around 50ah per day for a model with blades of around 1.2m diameter.

However, there are few average days and a 24-hour period with steady 15-knot breeze would see the same unit produce more than 100ah per day. In a 25-knot wind it would be 500ah.

The daily output of fuel cells is very predictable. For example, a model rated at 5 amps would produce 120ah per day, if run constantly for 24 hours.

It’s worth noting that, as the catalyst nears the end of its life this figure will tend to reduce.

Battery monitors

The more complex a yacht’s systems, with multiple power inputs and outputs, the harder it is to keep track of the battery state. However, a properly calibrated battery state monitor will measure all the power flows in and out of each battery bank. This makes it easy to keep track of power consumed and keep charge levels above the 50 per cent of battery capacity needed to ensure good battery life.

Reducing power requirements

Despite the increasing complexities of many of today’s yachts, new technologies mean that power requirements are steadily reducing in many cases. Whereas only a few years ago the accommodation of a quality 60ft cruiser might have been lit by 400W of halogen bulbs, low-power LEDs can reduce that by 90 per cent.

Despite their growing size, TVs can now draw less power than a couple of 12V lights did a decade ago. Similarly, tablets and smartphones are increasingly used for activities that not so long ago could only be done with a power-hungry laptop.

Pragmatic solutions for cruisers

For most yachts it’s worth combining a number of different types of technology, depending on how you sail and where. Here are some options for a range of different scenarios:

1. Cruising in Northern Europe

Despite a reputation for inclement weather, solar power can be a very viable option here, thanks to long daylight hours and relatively cool temperatures. The latter may sound counter-intuitive, but the efficiency of solar panels reduces at higher temperatures.

Whether wind power is worthwhile may depend on where you’re planning to sail and the time of year. In mid-summer in the southern half of the UK, for instance, the wind is typically less than ten knots for 50 per cent of the time, so wind generators are of limited use. However, in western Scotland towards the end of the season you could generate plenty of power, which would compensate for the reduced solar output.

With the longest passages most yachts will make being 300-400 miles, a hydro generator is likely to be of less use than for boats making longer voyages. An exception might be for those planning to spend a lot of time at anchor and who therefore value the ability to arrive at an anchorage with batteries fully charged.

2. Mediterranean cruising

While many marina-based yachts, with ready access to shorepower, in the western Med appear to have been slow to adopt solar power, the opposite is true in the eastern Mediterranean where there are increasingly few privately owned yachts without an array of panels.

As an example, Alan and Deborah Mackenzie’s Lagoon 410 catamaran, based in the north-west Aegean, has three 100W semi-flexible panels. This has proved fractionally too small for their needs – to power a fridge, freezer, powerful fans and a 19in TV/DVD in addition to the boat’s systems. They plan to solve this with an additional panel.

Owners of monohulls tend to be more restricted by the space available to mount panels, although the new thin-film panels clearly offer a wider range of options. Given the relatively short distances most yachts travel on each passage, the same considerations regarding a hydro generator in northern Europe apply here.

Equally, in most parts of the Med, wind power is not viable for much of the time.

3. Caribbean

Here it would be easy to assume that solar is the best option. However, while it can certainly be useful, as the main sailing season is winter, when daylight hours are restricted, daily output is smaller than many owners expect. Given that the islands are in the tradewind belt, wind generators stand to produce a good output here.

4. Tradewind passagemaking

Here it’s clear that hydro generators (or power generation via a hybrid drive) have advantages and can deliver a good charge. Wind power, however, makes less sense for tradewind sailing, owing to the reduction in apparent wind speed when sailing downwind.

The output of solar will also suffer from the restricted number of daylight hours on a typical east to west Atlantic crossing. There are, however, more factors in favour of solar on a west to east crossing, as it is likely to be at a higher latitude – with more daylight.

5. World cruising

If you’re going further afield combining as many options as possible will yield the best rates of charging over a wide range of conditions. This is exactly the route taken by Jimmy Cornell, founder of the ARC, whose new Garcia 45 is fitted with solar, a Sail-Gen water turbine from Eclectic Energy and a wind turbine.

The water generator will create 50W of power at four knots of boat speed, rising rapidly to more than 250W at 7.5 knots. The wind turbine, from the same company, is also a high-power model, with a 1.1 metre rotor diameter, producing approximately 100W in 15 knots of wind, rising to 235W in 22 knots.

For more information:

www.africancats.com

www.sunware.de

www.solarclothsystem.com

www.wattandsea.com

www.efoy.co.uk

Eclectic Energy: www.duogen.co.uk

www.oceanvolt.com

www.ampair.com

www.hybrid-marine.co.uk

www.victronenergy.com

This is an extract from the June 2015 issue of Yachting World

Yacht Solar Panel Arch (Do This)

If you are wondering how to add solar power to your sailboat, look no further. Inside we walk you through Yacht solar panel arch options, and we give you a few more pieces of information that are essential to this project. 

A sailboat or yacht solar panel arch is an aftermarket add-on for your boat. In short, it is a metal arch frame that attaches to the stern of the boat, where you would then attach solar panels.

Solar accessories, such as batteries, solar regulators, and inverters become housed in a water-tight cabinet above or below deck. 

Note :   Because of the force of winds and the corrosive nature of saltwater, stainless steel is the best material to use to build an arch. 

In this blog, we discuss

• What a sailboat arch kit is
• Determining solar need
• What to look for in a DIY kit or Solar panel kit for your boat
• Shading and what that means for solar energy production
• We also share a few essential tips along the way

Sailboat Arch Kit 

You have two options when it comes to a yacht solar panel arch installation. You can go with a kit, or you can go the DIY route. 

What are you looking at in terms of components for a sailboat arch installation?

Some of the information below will change as the boat gets larger. Generally, you want:

• 3 X 185-250 watt — 24volt solar panels . You can go more extensive on the wattage if you need to power more gadgets. On larger boats, you might have the space to add a fourth panel. If this is a DIY project, be sure to note the physical size of the panels, as that will dictate how many you can install on the arch. 
• Charge Controller with enough input ports to handle the wires for each solar panel . If you use three panels, the controller will need three input ports. If you use four panels, the controller will need four input ports. An MPPT charge controller works well for this application. 
• An inverter that will handle charging smaller gadgets
• A Battery Storage System with enough amp-hours to cover your power needs
• An arch kit to attach the solar panels and other gear is good. Some arch kits include all the above components, and others are just the arch. 

To figure out the size of the sailboat solar panel kit you need, calculate the electrical usage for things like:

• Computer laptop, and cellular charging or usage
• Entertainment such as music and TV or DVD
• You may also need power for things like radar, communication, etc. 

Other considerations include seasonal fluctuations for incoming solar radiation and the location of the boat. It is better to have more energy than you need than not enough.

Storms, cloudy days, and other shading events can cause a drop in power production. Storms or clouds can last for several days.

Solar Arch Cost & Options

There is a range in pricing for solar panel kits for a sailboat. Many are in the $2,500 range. It is more important to shop based on what you need rather than solely on price. Larger kits can cost above $10,000. 

Sailboat and yacht builders may have options if you are going for a custom boat build. As you consider the cost of a solar arch, focus on:

• Aesthetically pleasing design – The arch should fit the general style of your boat, not be an obvious add-on to it. 
• Durable — Boats take a beating in storms, high winds, rough seas, and other natural elements. The arch must be able to hold the solar panels firmly without warping or breaking. 
• Functional — The function of the arch is to look nice and hold the solar panels in place. Stainless steel is a good option over other metals, including aluminum. 
• Sealed — Not always an option but having the arch sealed against weather and water is a good investment. 

See also:   Solar Panels on Boats (Are They Worth It?)

Options for Solar Arches 

Solar arches can hold a lot more than solar panels. You can look for options in kits or have them built into a custom or DIY project. Those include

• Radar Risers — These can be permanently attached to the arch or designed for easy removal as needed. 
• Radar Pole — a taller version of the radar risers
• Wind Generator Pole — when you want to harness the power of the wind and include solar energy too. These can be permanently installed or added as a removable option. 
• Antenna Riser or Pole — You can opt for an antenna pole or riser when you need more clearance for your antenna. These can also be removable. 
• Davit Extension Arms for hanging a dinghy

What Is the Best Solar Arch Kit?

Figuring out which is the best solar arch kit for your boat is difficult to say. The best solar arch kit will differ based on your solar energy needs and the type of boat you have.

Larger boats tend to need more energy than would a smaller boat. A sailboat might need more panels than a yacht because the sails and masts can cause a shading effect.

Shading means that less sunlight falls on the panels, which decreases energy production. 

Also, since we are discussing shading on a sailboat, you would likely want microinverters over string inverters.

The reason is that when you have a string inverter if one panel becomes shaded, it causes the total output of energy to drop for all panels.

With microinverters, a single shaded panel would cause the energy from that panel to drop, not from all panels. 

You could apply this also to a yacht. However, it would not be the sails or mast that causes shading; it would more likely be something blocking the sun while moored at a dock. 

In terms of what is best for your boat, look for:

• Aesthetics 
• Stainless Steel for strength
• Options for add-ons that fit your needs and lifestyle
• Functionality 
• Options — You may not need risers or poles, but you may need them in the future, and it is an excellent option to have that ability now rather than paying someone to install them later or replace the solar arch. 
• Warranties — be sure to compare warranties to see if there are differences. Some repairs may be covered by insurance, but they can be better and less expensive in the long run if a warranty covers them. 

These variables will change from one boat to the next, but they help make it a more informed decision when choosing a solar arch kit for a yacht or sailboat. 

• Other Applications – Department of Energy
• Sportsman Boats – South Carolina Energy Office – SC.GOV
• Design of Small Photovoltaic (PV) Solar-Powered Water Pump
• Planning a Home Solar Electric System | Department of Energy
• PVWatts Calculator
• Green Power Equivalency Calculator – US Environmental …

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Tales (not just) from the high seas

How to mount your solar panels on the pushpit

When we mounted our solar panels eight years ago we opted to hang them from the side, off the pushpit, at the back of the boat, as opposed to mounting them on a gantry or davits above head height at the back. the main reason for doing this at the time was to retain the lines of the boat, but there are more practical reasons for going down this route..

Since that time we too now have davits, albeit small, pivoting ones that swing in when not in use, but despite this, and despite an accident that I’ll go into later, we still prefer our set-up. We’ve been asked by two yachties in the last month to write this guide so, bearing in mind we have some time constraints due to prepping the boat and our video commitments , we’ve put together this simple picture-guide to our solar panel solution. We hope it helps others looking at doing something similar.

We have six 40w Kyocera panels, three on each side. On a good, clear, sunny day they can draw up to 15amps. We prefered the idea of breaking the panels up into smaller ones because of the shadow effect from rigging and other objects. If one is in shadow, it won’t affect the other two.

The panels themselves are mounted on aluminium frames. These are then bolted to a stainless frame that houses three panels each. There is a stainless strut between each panel on the underside.

The hinge is made up of two flat U-clamps. One side is welded to the frame, the other is free. It has two nylon ‘bearings’ that allow easy movement when swinging the panels up to their horizontal position. Although the two U-bolts are clamped together, they are only tight enough to keep the nylon bearings from falling out, not so tight that you can’t move them. There are two hinges either end of the panel that mount onto the top bar of our push-pit. For the record you should know that we extended our pushpit. I’ve seen panels hanging from guardwire, which works just as well but doesn’t have the structural integrity of a solid frame clamped to the pushpit.

The Support

Looking at the solar array when hanging in its vertical position, the bottom corner has a protruding bolt welded to it.

A stainless rod with an eye at one end hooks over the bolt and this is screwed with a nylock nut to prevent it falling off. Again, this is not screwed tight. The other end of the stainless rod then slips into a bracket that is loosely bolted onto the lower bar of the pushpit.

As the solar panel is lifted up the rod slides through this bracket and, when in the horizontal position, is tightened with a wing-nut.

Although we have the wing nut we find that the angle and the weight of the panel prevents the rod from slipping, so we don’t have to do the wing-nut up.

Also we had two rods either end of the array but this required two people to lift the panels up, with one at each end easing the rod through the bracket. Because the frame is strong enough we have done away with one of the rods and have found that using one rod only is enough to keep the panels in position. We have gone through some pretty shitty weather with the panels in their horizontal position without any adverse effect to the structure.

Advantages Of This Set-Up

• Easy to handle
• Can be moved into any position from 0 degrees to 110 degrees, depending upon the sun’s position
• Doesn’t spoil the boat’s lines
• Acts as a dodger in bad weather
• Unobtrusive when not in use
• Even weight distribution

Disadvantages

• Can hit or be hit by other boats

This last point is worth bearing in mind, and I speak from experience. On my first day of solo sailing around the Greeks Isles, I anchored in a bay with terrible holding and didn’t set the anchor properly. At two in the morning I was awoken by people shouting and found that I had dragged across the bay and hit the bow of another boat. Fortunately no one was hurt and the only damage was done to, you guessed it, one of the panels. It has since been ‘fixed’ and still works and it is the only time the panel has come close to being damaged.

Despite this unnerving event, I would still opt for this solution to hanging solar panels on a boat. We’ve since sailed 20,000 miles across oceans with this set-up, often with the panels in their horizontal position, with no problems. You can catch a glimpse of the panels in this position on our crossing of the Indian Ocean here:

If you have any questions please leave them in the comments below and we’ll be happy to answer them. If you’d like to support us and our future video updates, come and join the adventure here .

If you like our content and would like to support us, we will give you ad-free access to our videos before they go live to the public, discounts in our shop, access to Jamie’s iconic full-res photographs, and supporter-only blog posts. Click our ugly mugs for more info!

4 thoughts on “How to mount your solar panels on the pushpit”

Good article and information. Thanks

Thanks, Vin. Glad you found it useful.

Really interesting set up for your solar panels. It’s really cool to see how you guys incorporated them like this! Have they been useful to you guys over the years?

Thanks for taking the time to make your solar panel post. My problem was that I was  trying to get my 40 watt panels mounted on the guard rail just like you but was going to use sprayhood fittings ….the cost was exuberant. I eventually settled on some cheap little plastic brackets and a aluminium strip which works just fine and probably better that sprayhood fittings.

Thank you Graeme

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Solar Panels for Boats

• 30 Years Experience
• Applications
• Types of Solar Panel for Boats

Surface Mounted Solar Panels

Gantry mounted solar panels, 30 years of experience.

As a distributor of marine solar panels Marlec has advised and supported the British Marine Federation for many years in matters of solar power for boats. In collaboration with the World Cruising Club our knowledge and understanding of ARC participant s needs are well understood. You can purchase marine solar panels directly from us and build up your own solar power system, or speak to our team of wind and solar experts about planning your energy needs for your trip to ensure your power system reliability. For over 30 years Marlec has been providing wind and solar power for boats putting us in a unique position to advise and supply you with a suitable solution.

View our Introduction to Solar & Wind Energy for your boat:  https://youtu.be/IfWAiYWKU6k

View our Introduction to Solar Energy & Solar Panels for your boat:  https://youtu.be/xcf8J4LM_rk

Types of Solar Power for Boats

It is important to use marine solar panels to ensure that you have a system designed to withstand the harsh conditions at sea. Flexible solar panels can be used to create a flush finish and can even be walked on, or solid framed glass panels can be used for a higher power density and for extra mounting options.

• 10W – 200W Power Rating
• Semi-Flexible
• Surface Mounting
• Standard and Pro Modes Available
• A Mono Crystalline Solar Cells (Standard)
• SunPower Cells (Pro Models)
• Ultra-Lightweight
• 3m Twin Core Cable Included
• Blocking diode included

Spectra PERC-S

• 30W-400W Power Rating
• Glass Frames
• Identical Frame Lengths for Combing Different Ratings.
• Uses PERC Technology
• Shingled Cell Module Design
• By-pass Diode configuration to avoid ‘hot spots’.

• 24-69W Power Rating
•  Semi-Flexible
•  Surface Mounting
• Marine Grade Stainless Steel
• EVA Surface
• Teflon Coated Surface
• 3m Seawater Sealed Cable Included
•  Blocking diode Included

• 10-140W Power Rating
• Framed (Not Flexible)
• Gantry/Bracket for Mounting
• Silver Anodised Aluminium Frame
• Transmissive Toughened Glass

• 10-135W Power Rating
• Framed (Not Flexible)

To be laid or fixed to a surface/deck.

• Ideal for when deck space is at a premium
• When used on a temporary basis can be moved into the sun and away from shade
• Lightweight and flexible
• Can be walked on in boating shoes
• Simple to remove and store

Solid framed modules to be mounted using mounting kits or by other means.

• Solid mount above deck reduces shading from overhead objects
• Allows for larger arrays and therefore greater power consumption

• Search forums
• Liveaboard Link

Any Experience of Mounting Solar Panels on Guard Rails?

• Thread starter silver-fox
• Start date 17 Dec 2015
• 17 Dec 2015

Active member

I have 2 x 80W panels on a stern gantry that work quite successfully but I have decided to double my solar generation capability. That gives me two practical choices, either - modify the gantry and mount them up there, or - mount them on foldaway brackets on the guardrails alongside the cockpit I have decided against flexible panels because of shorter life and lower performance when compared with rigid. Does anybody have any practical experience of rigging solar on the guardrails? I am keen to learn how satisfied or otherwise you were with this solution  

Well-known member

I have 2 x 50w panels mounted on the wire guardrails of Caladh and they work well. The angle to the sun can be adjusted but I find that 45-60 degrees provides the best performance. If you're lucky at anchor at least one or both will be in sun depending of what shading you have. Likewise when sailing its a lottery but at least one will inevitably be seeing the sun. Look at other yachts regarding a "fitting" that would suit your boat/yacht. Cabling always takes longer than you imagine and try to do it in the spring when it's not too hot !  

I have two 75 Wp panels mounted outside the port and starboard push-pit rails. The hinges allow for different positions and I use a notched stick to hold their attitude. I do worry when manoeuvring at close quarters. They are vulnerable facing outwards and even more when deployed.  

I think success and longevity is very dependent upon the layout of the boat and just where the panels can be sited. I have lost three stanchions at about the mid-point of the boat over the years due to collisions, one my fault the other two due to others. Solar panels mounted there would have been destroyed in those accidents. The deck between my cockpit and guard wires is very narrow and solar panels there would pretty much prevent me from berthing stern-to. On other boats these would not be problems.  

Some useful info from here: http://followtheboat.com/how-to-mount-your-solar-panels-on-the-side-on-the-pushpit/  

I had two on the guardwire, one on each stern quarter, on my last boat, having previousy replaced the wire with stainless tube between the pushpit and the aft-most stanchion. They worked fine. As said, there are concerns about damage, and it would be advantageous to be able to tilt them inboard when berthing. I think Sea-Teach sell suitable rail brackets: http://www.seateach.com/chandlery-brackets-mountings.html  

Several boats hereabouts have had fitted them, but each fitted solid guard rails as part of the process to provide a more stable mounting, as far as they were concerned, and allow more flexibility in terms of the angle to the sun. Both seem happy with their respective solutions - neither solution would allow the panels to be turned in board - would very useful when reversing into the local travel lift.  

Ours used to be mounted on guard wires as a temporary fix before the gantry. I threaded guard wire through plastic pipe and then that through stainless tube which was bolted to panel frames with saddles. Worked OK except that adjusting angle with ropes to toe rail was a bit fiddly.  

As Javelin (above) knows, I am about to move my panel from a cockpit mounting to a gantry, but largely for tidiness. I had port and starboard 85W panels on Plastimo mounts on either side of the pushpit. They worked fine, but you had to remember to drop them before coming alongside. One got caught by a bit of a freak wave and got nicely bent, but that was in far from normal conditions.  

• 18 Dec 2015

RAI said: I have two 75 Wp panels mounted outside the port and starboard push-pit rails. The hinges allow for different positions and I use a notched stick to hold their attitude. I do worry when manoeuvring at close quarters. They are vulnerable facing outwards and even more when deployed. Click to expand...

• 20 Dec 2015

Thanks for the feedback, photos and ideas guys - much appreciated.  

• 21 Dec 2015

Chris_Robb said: We have a centre cockpit boat and mount our 2 x 85 panels each side. to date we have got away with no damage - and they are mounted to lift over the deck but even so we were rammed astern and one was bent - but still carried on working. This year we are going to put up a gantry for them as they do restrict deck space - but it has been successful and they are out of shade most of the time - a very important consideration. Click to expand...

FullCircle said: What a great tray for the Hors d'Oeuvres..... Why didn't you swing them outboard of the rail? Click to expand...

silver-fox said: I have 2 x 80W panels on a stern gantry that work quite successfully but I have decided to double my solar generation capability. That gives me two practical choices, either - modify the gantry and mount them up there, or - mount them on foldaway brackets on the guardrails alongside the cockpit I have decided against flexible panels because of shorter life and lower performance when compared with rigid. Does anybody have any practical experience of rigging solar on the guardrails? I am keen to learn how satisfied or otherwise you were with this solution Click to expand...

• 23 Dec 2015

bob234 said: I think guard rail hanging might be less successful in the latest delta shaped hulls with very wide aft sections. Some return in the deck shape towards the stern ensures the panels are not at the widest point of the boat. Very pleased with the ability to rotate the panels throughout the day as the sun moves. Click to expand...

FullCircle said: That's a good thought, so why dont we mount them in the forward quarter of the boat? Click to expand...

• 24 Dec 2015

We have a pair of 75w panels on each side of our boat fixed to the guard wires. We have done three Atlantic crossings like this with no problems. They are adjusted with a notched pole and held down with a line to the toerail. We fold them down when coming into a marina. Very happy with the arrangement and I don't need to have a gantry. I really don't like gantries as they spoil the look of a yacht and add a huge amount of windage.  

Am I correct in thinking that guardwire-mounted panels are a bit vulnerable on a modern wide-stern boat, but less so on a more old-fashined shape? I'm hoping to eventually add a couple of 100w panels but our boat is relatively narrow at the stern. I don't like the look of a gantry and it would be a shame to spoil her lines.  

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Yachting Monthly

• Digital edition

Best Solar panels for off-grid power and keeping batteries charged

• Phil Sampson
• November 28, 2022

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, 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 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 batteries will be pleased, because keeping them from going flat can extend their 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.

Reasons to buy: Incredible amount of power, panels are abrasion resistant as well as anti rust + dust proof

Reasons to avoid: Premium price

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.

Ecoflow 160w portable solar panel.

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.

Reasons to buy: Foldable, lightweight and long warranty

Reasons to avoid: Not resistant to the elements, doesn’t feature mounting holes

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.

Reasons to buy: Competitively priced, Features LCD panel, brackets

Reasons to avoid: Only a year warranty, not resistant to elements

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.

Reasons to buy: Lightweight, waterproof, dual controller

Reasons to avoid: Lacks mounting options

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.

Reasons to buy: Great budget option, plug and play

Reasons to avoid: Not waterproof, won’t go far on 10V

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!

Reasons to buy: Incredible price, can be charged via car lighter plug

Reasons to avoid: Small, not very efficient

Price: £9.99

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Compass Articles

• May 13, 2024

Solar Sailing: Implementing Solar Power on Your Yacht

Today, the ocean calls for adventurers and dreamers alike, but it also calls for conservationists. As yacht owners, we’re uniquely positioned to lead the charge in sustainable boating practices. Implementing solar power on your yacht isn’t just about embracing technology; it’s about sailing towards a future where our oceans remain as pristine and welcoming as they’ve always been meant to be.

Why Solar Power Makes Sense for Your Yacht

The beauty of solar power lies in its simplicity and efficiency. Solar panels capture sunlight and turn it into electricity without moving parts, noise, or emissions. This clean energy can power everything on your yacht, from navigation systems and lighting to your refrigerator and entertainment systems. The sun is a reliable, abundant source of energy, especially out on the open water where it’s unobstructed and plentiful.

The Technicalities of Solar Power on Yachts

Modern solar panels are more efficient, durable, and versatile than ever before. They can be installed on nearly any surface of your yacht, including the roof, deck, or railings, and are designed to withstand the harsh marine environment. The electricity generated is stored in batteries, ensuring you have power whenever you need it, day or night.

Installation Insights

Going solar is easier than you might think. The key is planning and professional installation. You’ll need to consider your yacht’s energy usage and size to determine how many panels you need. A professional installer can help you find the perfect balance, ensuring your system is efficient, effective, and aesthetically pleasing. Plus, they’ll handle all the technical aspects, from wiring to mounting, so you can focus on enjoying the benefits.

Beyond the Green Benefits

Yes, solar power reduces your carbon footprint, but the benefits don’t stop there. Firstly, it can significantly cut down on fuel costs since you’ll be relying less on your yacht’s generator. Secondly, solar power systems are low maintenance, requiring little more than occasional cleaning and inspections. This means you can enjoy more time exploring and less time and money on upkeep. Furthermore, solar power enhances your autonomy at sea. With a reliable power source, you can stay off the grid longer, exploring those untouched corners of the ocean.

Making the Switch

If you’re considering making the switch to solar, there are a few things to consider. What are your energy needs? How much space do you have for panels? How often do you sail, and in what conditions? Answering these questions can help you and a professional determine the best system for your yacht.

The Future is Bright with Fly Yachts

At Fly Yachts, we’re more than just a yacht brokerage. We’re your partners in navigating the future of eco-friendly yachting. Our team is here to help you find, customize, or retrofit the perfect yacht with the latest in solar technology. Let’s set sail on a cleaner, greener journey together, with the sun guiding us every step of the way.

Fly Yachts offers a diverse range of  yachts for sale , ideal for anyone looking to invest in a luxury yacht. If you’re interested in a tailor-made yacht, their  Build a Yacht  service allows you to customize a vessel to your precise requirements. For those desiring to explore exotic locations,  Charter Destinations  features a variety of destinations, all bookable through  Yachts Charter  services. If you’re planning to sell your yacht,  Sell Your Yacht  provides professional guidance to aid the selling process. Stay informed with the latest yachting trends and updates by reading  Compass Articles  and keeping track of  Gulfstream News . Learn more about Fly Yachts by visiting the  About Us  page or start exploring from the  Homepage . For any inquiries or assistance, the  Contact  page is available to help. Additionally, if aviation is part of your interest, be sure to check out the  Aircraft for Sale  for more luxury transportation options.

About FLY Yachts

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Motorhome solar panels, boat solar panels and caravan solar panels. Dual battery charge controllers. Solar panel kits. Semi flexible solar panels for motorhomes, boats and caravans.

² navigation, solar panels for boats and sailing yachts.

Marine grade solar panel fitted to the hatch of a classic yacht

Solar panels for boats,  the perfect way to keep your batteries charged.

Using a solar panel on your boat will free you from flat battery problems. The solar panel will convert the Sun’s energy into usable electricity, and store it away in your batteries, ready for when you need it.

So how do you fit a solar panel to your boat and what do you need?

Installing a solar panel on a boat: DIY or professional?

Will you fit the system yourself? If you have reasonable DIY skills and some spare time, you can install a solar panel system yourself. We will take you through this simple process, step by step.

If you need to use a professional installer, we suggest you ask your local boatyard for assistance. We can provide everything you will need including detailed instructions.

What sort of solar panel is suitable for my boat?

There are three types of solar panel for use on a boat:

• Rigid-framed solar panels . The standard type of solar panel, with an aluminium frame.
• Semi-flexible solar panels . These panels can be flexed by up to 10%.
• Marine grade solar panels . These panels can flex by up to 10%.  The most rugged solar panels available.

Rigid framed solar panels

Space for solar panels is often limited on a boat, but room for a solar panel can usually be found on an unused part of the deck, on a pushpit or perhaps on top of a wheelhouse, doghouse or bimini-top.

With the exception of marine grade panels, most solar panels cannot be walked on. So you will first have to decide if you can fit a solar panel away from areas where the crew are likely to tread. If so, either a rigid solar panel or a semi-flexible solar panel can be used.

If the only available space for the panel is in an area on the deck where the crew are likely to walk then a marine grade solar panel is the best option.

Permanent or portable?

Any type of solar panel can be portable.

If you are not sure about fitting a solar panel permanently to your boat, simply use a portable solar panel. Any type of solar panel can be made portable.

A portable panel can be laid out on the deck, fastened to a bimini-top or wheelhouse, or simply attached to the guardrails of your boat. You can use rope or Velcro to hold it in place. When not in use the portable panel can simply be taken inside the boat and stored away ready to be used another time.

The cable from such a portable panel can be taken inside the boat, through the hatch or weatherboards and connected to your battery. Of course, this kind of solar panel arrangement will only charge your batteries when you are able to leave it outside without fear of loss or damage.

Semi-flexible solar panel Velcro-ed to a spray-hood

Fitting a solar panel permanently, for example to the deck of your boat, involves a little extra work. But once done means that the solar panel will continue to work without any further attention from you. And your batteries will be charging up while you are away from the boat as well as when the boat is in use.

Fitting solar panels permanently to your boat or yacht.

So how do you fit a solar panel permanently to your boat? What items will you need for the installation? Fitting a solar panel system is very straightforward and we will now guide you through the process.

How you attach the solar panel depends on the type of panel and where to want to install it.  Fit a rigid framed solar panel to the deck using aluminium brackets. This type of panel can also be screwed to a pushpit or other frame using suitable brackets.

Semi-flexible and marine grade solar panels can be glued to a curved surface

Use a suitable adhesive to attach semi-flexible and marine grade solar panels to the deck. If you want to attach a solar panel to the guardrails or pushpit of your boat it is best to use brackets and screws. You can also tie it to the rails or fittings, but this method is less secure.

The frames of rigid solar panels can be drilled to take bolts or screws. NEVER attempt to drill a hole through the fragile active surface of the solar panel.  This will damage the panel permanently.

For curved decks or wheelhouse tops it is best to use a semi-flexible or marine grade solar panel. These panels can be bent to follow the contours of a curved surface and so are convenient in areas where a rigid panel would not sit flat on the deck.

Solar panels for boats and yachts. Technology.

Solara marine solar panels

The most rugged solar panels for marine use are those produced by German manufacturer Solara. These panels are built to withstand the harshest weather conditions. They have an embedded aluminium backing plate and a coating of Nowoflon on the front and back making them suitable for extreme conditions.

Solara marine panels can be bent by up to 3%, and can be walked on.

Other semi-flexible panels can be bent up to 10%. Some can be walked on, with care. Mount them away from areas where ‘foot-traffic’ is heavy.

You may have read about polycrystalline and monocrystalline solar panels. Monocrystalline solar panels offer the most up to date technology and efficiency.  All SunWorks solar panels are of this type.

Also available are amorphous or thin-film solar panels. Avoid these types. They are very inefficient.

100 watt semi-flexible solar panel

SunWorks semi-flexible panels use an encapsulated aluminium back-plate for thermal stability. There is also an abrasion resistant front lamination.

What size of solar panel do I need?

Generally, a 30 watt solar panel will keep an engine battery or a small leisure battery topped up when the boat is not in use.

For the average family cruising boat a 50 watt panel will provide a lot more additional power during the summer months and will help power your television, computer, lights etc.. If you need total independence throughout the year you will need to consider a solar panel system of at least 100 watts.

Connect more than one solar panel together to increase the power. Make sure all of your panels are of the same technology.

Whichever solar panel you choose, connect it to your battery via an electronic charge controller. A good charge controller will protect the battery from overcharging, whilst maximising the charge into your battery. It will also increase the life of your battery.

Which charge controller do I need?

SunWorks dual battery charge controller

Charge controllers are available as ‘single battery’ types that will charge either your engine or leisure battery, or as ‘dual battery’ types which will charge both your engine and leisure batteries.

Charging both batteries from the same solar panel is a great way to make full use of your solar panel investment.

SunWorks can provide the correct charge controller and all the other accessories you may need to install a solar panel system on your boat or yacht.

Solar panels for boats and yachts. Should I use a kit?

SunWorks 50 watt rigid panel kit

The simplest way to ensure that you buy the correct products for your installation is to purchase a SunWorks solar panel kit.

These kits are available in several sizes. The smaller sizes will keep your battery topped up ready for your next trip. During the summer months the larger sizes will provide plenty of power to run a small television, laptop computer, lights, pumps etc..

SunWorks 100 watt, dual battery, semi-flexible solar panel kit

SunWorks can supply kits with rigid or semi-flexible solar panels. For example the SunWorks 50-UNO kit contains a 50 watt rigid solar panel, the SunWorks Sb1C charge controller with LCD display, and all the cable and connectors you will need for your installation.

SunWorks FLEX kits contain semi-flexible solar panels. For example, the SunWorks 100-DUO-FLEX contains a 100 watt semi-flexible solar panel and the SunWorks DB1C dual battery charge controller, with LCD display. Also included are the appropriate cables and connectors.

Please contact us if you need help choosing a kit or if you need a special kit for your boat.

All SunWorks kits contain high performance, monocrystalline solar panels and the correct charge controller and cables. Comprehensive, illustrated instructions complete each kit. The instructions will guide you through every step towards making a professional job your solar panel installation.

Please take a look at our Product page for more details, and buying information.

Download the “SunWorks Guide to installing solar panels on your Yacht”. See the left hand column on this page.

Solar panels for boats and yachts: portable solar panels..

The simplest and quickest way to use a solar panel on your boat is to use a ready made portable solar panel. These panels have a fold-out stand that allows you to set the panel up outside the boat, pointing it directly at the Sun.

Thanks to the cleverly designed stand, the panel can be tilted up or down to suit the height of the Sun. Pointing the panel directly at the Sun makes it much more effective, increasing the charge stored in your battery.

The SunWorks 50 watt panel is capable of powering a small television or laptop computer on a bright sunny day.

To use the portable solar panel, simply take it out of its bag, set it up on the deck or pontoon, and clip the lead to your battery. That’s it!

SunWorks portable solar panels

The solar panel will convert the Suns energy into electricity and charge up your battery.

When the Sun goes down,  unclip the lead from the battery and fold away the stand. Store the panel away in its polyester bag ready for the next sunny day.

Stout aluminium sections ensure that the panel is strong and stable.

Designed specifically with boats in mind, the SunWorks charge controller will protect your battery from overcharge. Your battery will receive the maximum charge possible.

The panel come complete with a strong and attractive carrying bag.

For more information, please take a look at our Product page which has more details and buying information.

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• Solar panels for caravans and mobile homes.
• Choosing a solar panel system. A little more technical info’.
• Solar panel charge controllers.
• Solar power for expats in France and Spain.
• 20+ facts about solar panels on motorhomes, boats and caravans.
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