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The Complete Guide to Solar Panel Mounts for Boats (and Where to Position Them)

How many boaters invest hours researching solar panels? They go all wide-eyed at the shiny panels, marveling at their ingenuity, but how many consider the humble mounts those bright panels sit on?

Let's face facts: Solar panels get all the glory, but spare a thought for the mounts? A good mount can help you get the most out of your solar, increasing your capacity by up to 40 percent.

So maybe it's time for mounts to step out of the shadows of solar panels and into the sunlight (bad pun, I know). Seriously, let's give them some glory.

The type of mounts you have depends on what you want the solar to do and the space available. Is it to charge a cell phone or mobile GPS unit? Or is it to power your entire onboard needs when stationary?

The engine does the hard work when you're moving, so you only really need solar when you're moored up, right? To find out what solar mounts are right for you, we first need to discover what type of boater you are.

Are You a Liveaboard Boater?

Being a liveaboard boater  is a different experience to being a leisure boater. You can't just plug-in to a marina or get into an SUV and tow the boat home at the first sign of a rain cloud. The boat is your home.

So power is something you need to manage carefully. And the right solar panel mounts for your boat are essential to optimize the performance of your solar panels.

Are You a Leisure Boater?

As a leisure boater, you'll have different priorities than a liveaboard, and your need to manage power is not so crucial. You'll watch for sunny weather and head out in the boat for a day or weekend excursion . So why do you need solar?

Coolers need power to chill their contents and cell phones need charging. But in the main, the boat engine will power the electrical equipment onboard, because there won't be long periods when you're not moving, unlike a liveaboard boater.

Liveaboard or not, if the sun's power reduces your costs, minimizes the engine's wear and tear and you can afford it, why not?

What Are the Best Boats for Solar Panel Mounts?

Pontoon Boats

It depends on the size and shape of your pontoon boat . Smaller vessels are designed to make the most of the available space, which means seating and guests take priority on the deck .

Newer models, like the Cypress Cay Sea breeze SL 250, have virtually no surface to put solar mounts. Some pontoons have living space.

The Canadian manufacturer  South lands  builds hybrid pontoon boats, but the average pontoon vessels are for day trips and fishing. Some pontoons have fixed canopies so solar mounts can fit the available flat surfaces .

If you're in the market for a pontoon boat, solar panels and how to mount them are way down on your list of priorities.

Yachts offer a multitude of opportunities to fit solar mounts. Pole mounts are popular with yacht owners, as are fixed and angled mounts . And because most yachts are seafaring, there's little to obstruct the sun's rays way out in the ocean.

In addition, yachts are designed to travel farther, making extended periods onboard inevitable. This means that choosing the right mount is crucial to achieving maximum input.

Canal Boats

A  canal boat's  design makes them ideal vessels to fit solar mounts. Their robust, steel roofs can withstand the most durable solar panel mounts. This means larger panels can be attached to increase onboard power input.

Because of their long shape, canal boats also allow various panel mount options too. In fact, the only solar panel mount that's unsuitable for a canal boat is the pole mount because of low canal bridge clearances.

Motor Cruisers

Motor cruisers, because of their shape, often have plenty of space for panel mounts to be fitted. With long flat roofs, most motor cruisers (even the mid-range ones) are excellent boats for fixed, angled and even pole mounts .

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The Best Ways to Fix Solar Panel Mounts to Your Boat

Glue adhesives.

There are numerous products available to bond panel mounts to any surface. If you choose this option, it's worth remembering there's some prep work before applying the glue.

Most manufacturers recommend cleaning the surface area before bonding, and some recommend lightly sanding the surface before applying adhesive.

I recommend this  Sikaflex-252 White Polyurethane Adhesive The most significant advantage of this glue is that once dried, it can be sanded and painted. Oh, and when choosing adhesives, there's the small matter of  no holes .

The fixing solution you choose depends on the boat you have and where it's used. Gluing solar mounts on a seafaring yacht may not be the best idea, especially if you're mid-Atlantic in force nine gales.

You want to know that the mounts are going to do their job and hold your solar panels in place. This Temco Z Bracket Stainless Steel Mount Kit (Available on Amazon) can be easily installed on solar panels. The stainless steel material means it'll never leave rust on your boat.

You're gonna need to bolt the mounts to the roof. Just make sure that when you've drilled the holes, you have enough marine-grade  sealant to plug the gaps.

Panel Sizes Versus Types of Mounts for Your Boat

Some solar panel mounts aren't suitable for different-sized panels. The most robust by far is the fixed mount system. If you cruise a lot and don't mind the panels being permanently flat, then these mounts can handle whatever weight you throw at them.

If you want tilt and angled mounts, then you'll need to check with the manufacturer what the maximum load is. The general rule of thumb is: the larger the mount, the bigger the panel it will hold.

Panel weights 100 w or less will fit cheaper mounts. If you want panels over 100 w, check with the bracket manufacturer to see the maximum load weight.

The Best Way to Position Solar Panel Mounts on the Boat

Your first consideration is the obstructions that might hamper the performance of the panels. Get it wrong and all that hard-earned cash you shelled will be for nothing.

Putting a fixed mount for solar on a deck of a motor cruiser isn't any good if you then use a retractable canopy to shield you from the sun and it blocks the panel producing energy. You've just wasted hundreds of dollars.

Another consideration is the mount type, especially if you're stationary for long periods. Tracking the sun by tilting the panels when not moving will increase power input massively.

If you're mostly moving and rarely still, then flat is best. This position optimizes the sun's rays, drawing power in whichever position the boat sits.

Look at your own boat. Does it have large flat areas, preferably high up and unaffected by shadows or obstructions? If the answer is yes, then the next consideration is what type of solar panel mount is best for you.

The Different Types of Solar Panel Mounts for Boats

Fixed Mount

The  HQST Z-Bracket is an excellent example of a fixed mount. It's lightweight and inexpensive. And I mean cheap!

It isn't complicated to fit, although it does require you to drill holes in whatever surface you attach it to. This bracket also enables you to mount the panel to many styles of vessels. The manufacturer even recommends them for RVs.

The other advantage of a fixed mount system is its ability to handle panel sizes from the smallest all the way up to 300w. While these look like a good option, it's worth remembering that if you need the flexibility of moving the panels to chase the sun, fixed mounts won't be for you. 

On an ocean-going yacht or a pontoon boat (space permitting) on a lake, the fixed mount system would be worth considering. There'll be minimum obstructions, and while you're always moving, the flat fixed mounts will optimize the charge into the batteries.

There are other types of fixed-mount systems that don't require any drilling.

The  Renogy Solar Panel Drill-Free Corner Bracket is a good choice if you don't want to drill holes in your boat roof. They aren't as cheap as the Z-Brackets, but primarily they do the same job.

If you own a boat with a fiberglass body, drilling into the roof simply isn't an option. So how are they fixed? Good old bonding adhesive like Sikaflex 252 (Available on Amazon) .

Adjustable Mounts

The Renogy Adjustable Tilt Mount Bracket  mount enables the solar panel to be adjusted to directly face the sun, a feature commonly used when the boat is still.

For the liveaboard boater, the adjustable mount is crucial. By adjusting the angle of the panels, you can increase the input of energy by up to 40 percent.

This particular model can only support a maximum panel of 150w, and the adjustment angle does decrease depending on the size of the panels. So it's worth considering that the max 150w panel, while the most powerful, could give less performance with this bracket, because of the angle that it can be mounted.

What makes this mount different is that the brackets that attach to the roof of your boat are independent of each other, rather than on a long aluminum bracket joining them together.

It means the roof doesn't have to be completely flat. Canal boats would benefit from this type of bracket because they have slightly curved roofs.

The Link Solar Adjustable Rack Solar Panel Mount  is another adjustable bracket, enabling the maximum performance of the panels.

It's a rack system, so it has a long strip bracket that attaches to the roof. The beauty of this system is the capacity it can handle.

If you invest in the 41-inch bracket, it'll take the weight of a 300w solar panel. It may cost more, but given that you'll probably only need two brackets if you're mounting 300w solar panels, it could still be a cost-effective choice.

Just remember where you're going to mount it. Because it's a rack system panel mount, it only fits on perfectly flat surfaces.

AM Solar 35mm Tilting Mount Okay, I'm a bit sneaky here. Technically, these mounts are for RVs. But if it attaches to RVs, it'll attach to your boat. They're light, compact and give vital adjustability to maximize the sun's power.

This mounting system's advantage is you'll avoid drilling holes in your roof. Each bracket has a VHB tape strip, which bonds to most surfaces. Fiberglass gives the best bond, but if it works for RVs, then metal surfaces will work too.

A word of caution:  These brackets attach by drilling into the solar panel's side. This is the crucial bit: If you're piercing the side of your panel, there's a strong chance you'll invalidate the warranty.

It's worth checking before you do. AM Solar sells compatible panels with pre-drilled holes, which massively cuts down on your choices and ability to shop around for the best price.

Pole Mounts 

Missouri Pole Mount

Let's start with a positive: This pole mount is 100% American. That's got to be a good thing, right? 

Pole mounts are excellent for panels that can be raised up to avoid obstructions. They're also good for boats with limited solar panel mounting space.

Pole mounts are popular with yacht owners due to their maneuverability and height adjustment properties. This particular pole system can handle two 100w panels, so there's no need to compromise on the energy you create.

What We've Learned

All the solar panel mounts featured are value for money. What to consider is the panel size. Is it better to have two 300w panels, reducing the number of solar mounts? Or do you go for six 100w panels, increasing the mount's overall cost? That'll depend on your boat's available space.

By far, the easiest to use is the fixed flat system . Glue or bolt the brackets on and away you go. No fuss. But again, mounting space may be an issue, so this type of mount won't be for everyone.

The most efficient is the angled, adjustable mount . Liveaboards should consider this when buying solar. Increasing your panel's performance with the ability to angle towards the sun is vital if you're stationary for extended periods.

In winter, when the sun sits lower in the sky, you'll reap the benefits of angled mounting systems for sure.

To clean your solar panels, simply rinse with a boat hose  and nozzle and swipe with a silicone squeegee . This is a quick task to do when you've got out the boat soap  or hull cleaner for the rest of the vessel.

One Final Point

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Adding Solar Power to a Sailboat

• By Emily Fagan
• Updated: October 18, 2019

During our nearly four-year cruise of Mexico, my husband, Mark, and I lived almost exclusively on 555 watts of solar power charging a 640-amp-hour house battery bank. We anchored out virtually every night aboard our 2008 Hunter 44DS, Groovy , and relied on the sun for power. During one 10-week stretch, while we waited for a replacement engine alternator to arrive, our boat’s solar panels were our sole source of power. We had no backup charging system to turn to, and yet we lived and sailed comfortably the entire time. Mounting solar panels on a sailboat was not difficult, but a few key decisions made a huge difference in how effective our panels were.

A solar-power installation on a sailboat is made up of two independent systems: one system to charge the batteries, and another system to provide 120-volt AC power for household appliances. In the charging system, the solar panels convert sunlight into electrical current and deliver it to the batteries via a solar charge controller. Similar to a voltage regulator, the charge controller acts as a gatekeeper to protect the batteries from receiving more current than they need as they are being charged. In the AC power system, an inverter or inverter/charger converts the 12-volt DC power in the battery into 120 volts AC whenever it is turned on.

Panel Positioning and Wiring Considerations

One of the biggest challenges for sailors installing solar power on a sailboat is finding a place on the boat where the panels will be shaded as little as possible. Just a few square inches of shade on one panel can render that panel all but inoperable. Unfortunately, between the mast, radome, spreaders and boom, shadows cross the deck all day long, especially as the boat swings back and forth at anchor.

What’s worse, if the panels are wired in series rather than in parallel, this little bit of shade can shut down the entire solar-panel array. When we installed solar power on Groovy , we had already lived exclusively on solar power in an RV for over two years. Our RV solar panels had been wired in series, and we had witnessed the array shutting down current production when just half of one panel was shaded.

Choosing whether to wire the panels in series or parallel on a boat affects the wire gauge required, which is why many solar-power installers lean toward wiring the panels in series. Panels wired in series can be wired all the way to the solar charge controller with a thinner-gauge wire than those wired in parallel. This is because the voltage of panels wired in series is additive, while the current remains constant, so the current flowing is just that of a single panel. In contrast, the current flowing from panels that are wired in parallel is additive, while the voltage across them is not. This means that in a parallel installation, the current going to the charge controller is several times higher and requires much thicker cable to avoid any voltage loss over the length of the wire.

Not only is thinner-gauge wire less expensive, but it is also more supple and easier to work with, making the job of snaking it in and around various crevices in the boat and connecting it to the solar charge controller much less of a struggle. Thus the choice between series and parallel wiring boils down to a trade-off between system performance, expense and ease of solar system installation.

Luckily, the size of the wire can be reduced if higher-­voltage solar panels are chosen. Since watts are determined by multiplying volts by amps, a higher-voltage panel that generates the same watts as a lower-voltage panel will produce less current. Therefore, selecting nominal 24-volt panels instead of 12-volt panels allows for the use of thinner wire sizes no matter how they are wired.

Our Marine Solar Panel Design Choices

In our installation, we decided to mount three 185-watt, 24-volt (nominal) Kyocera solar panels high above the cockpit, well aft of the boom, as far away as possible from potential shade. Our Hunter came with a big, solid stainless-steel arch, and we turned to Alejandro Ulloa, a brilliant metal fabricator at Baja Naval Boatyard in Ensenada, Mexico, to build a polished stainless-steel solar-panel arch extension onto the existing structure. He designed the arch extension with integrated telescoping davits to hoist our dinghy as well as support the solar panels. These davits were strong enough — and the lines and blocks had enough purchase — that either of us could lift our light Porta-Bote dinghy with its 6-horsepower outboard without a winch.

We spaced the panels about a half-inch apart and wired them in parallel. Using two twin-lead wires, we snaked the three positive leads and one common ground down through the inside of the arch tubes so they wouldn’t be visible, and placed wire loom over the exposed wires under the panels.

The junction points for the three parallel panels were on positive and negative bus bars inside a combiner box, all mounted in a cockpit lazarette. Inside the combiner box, we installed three breakers, one for each panel. This gave us the ability to shut off any or all of the panels if we needed to (we never did).

We mounted a Xantrex solar charge controller (model XW MPPT 60-150) in a hanging locker, as close to the batteries as possible, in a spot where it was easy to monitor and program. We ran twin-lead wire from the combiner box to the charge controller and from there to the batteries.

Our boat came with three new 12-volt Mastervolt 4D AGM house batteries, all wired in parallel, for a total of 480 amp-hours of capacity. We wanted a bigger house battery bank, and because it is best for the age, type and size of the batteries to be matched, we added a fourth new Mastervolt 4D AGM house battery, which brought our total to 640 amp-hours. Our batteries were installed at the lowest point in the hull, below the floorboards, and they ran the length of the saloon, from just forward of the companionway stairs to just aft of the V-berth stateroom door.

The best way to charge a bank of batteries that are wired in parallel is to span the entire battery bank with the leads coming from the charge controller. We did this by connecting the positive lead from the charge controller to the positive terminal of the first battery in the bank, and the negative lead from the charge controller to the negative terminal of the last battery. By spanning the entire bank, the batteries were charged equally rather than having the charging current focused on just the first battery in the bank.

We feel that AGM batteries are superior to wet cell (flooded) batteries because they can be installed in any orientation, don’t require maintenance, can’t spill (even in a capsize), and charge more quickly. Our Mastervolt batteries, like almost all AGM batteries on the market, are dual-purpose, combining the very different characteristics of both deep-cycle and start batteries. Our batteries work well, but if we were doing an installation from scratch today, we would consider the new Trojan Reliant AGM batteries. These batteries are engineered strictly for deep-cycle use and have been optimized to provide consistent current and maximize battery life.

Our boat came with a Xantrex Freedom 2,500-watt inverter/charger wired into the boat’s AC wiring system with a transfer switch. The inverter/charger performed two functions. While the boat was disconnected from shore power, it converted the batteries’ 12-volt DC power into 120-volt AC power, allowing us to operate 120-volt appliances, like our microwave. When the boat was connected to shore power, it charged the batteries.

Because this inverter/charger was a modified-sine-wave inverter, mimicking AC ­current with a stair-stepped square wave, we also had a 600-watt pure-sine-wave inverter to power our potentially more sensitive electronic devices. We chose Exeltech because its inverters produce an electrical signal that is clean enough to power medical equipment, and they are NASA’s choice for both the Russian and American sides of the International Space Station. For simplicity, rather than wiring the inverter into the cabin’s AC wiring, we plugged ordinary household power strips into the AC outlets on the inverter and plugged our appliances into the power strips. Like the charge controller, the inverter must be located as close to the batteries as possible. Ours was under a settee.

Shade’s Impact on Sailboat Solar Panels

Once our solar installation was completed on our sailboat, we closely observed the effects of shade on our solar-panel array. We were often anchored in an orientation that put the panels in full sun. Just as often, however, we were angled in such a way that shade from the mast and boom covered portions of our panels. It was fascinating to monitor the solar charge controller’s LCD display whenever the sun was forward of the beam — the current from the panels to the batteries fluctuated up and down as we swung at anchor.

Taking notes one morning, we noticed that the charging current was repeatedly creeping up and down between 9.5 and 24.5 amps as the boat moved to and fro. When the entire solar-panel array was in full sun, it generated 24.5 amps of current. When we moved so the mast shaded a portion of one panel, the array generated 15 amps. When it shaded portions of two panels and only one was in full sun, the array produced just 9.5 amps. Of course, it would have been preferable to see a steady 24.5 amps all morning, but this sure beat watching the current drop to zero whenever a shadow crossed a panel.

We discovered that shade makes a huge impact while sailing, too. Surprisingly, it is far worse to have the panels shaded by the sails than to have the panels in full sun but tilted away from its direct rays. One afternoon, we noticed that while we were on a tack that tilted the panels away from the sun, they generated 24.5 amps of current, whereas on a tack where the panels were tilted toward the sun but two of the three were partially shaded by the sails, the current dropped to a mere 10 amps.

Reflections On Our Solar Panel Installation

A wonderful and surprising side benefit of our large solar panels and arch system was that the setup created fabulous shade over the jumpseats at the stern end of the cockpit. Our metal fabricator, Alejandro, placed a support strut at hand-holding height, and sitting in those seats feels secure and comfortable while sailing, no matter the conditions.

After living on solar power for eight years of cruising and land-yacht travel, we’ve learned that you can never have too much solar power. Groovy’s 555 watts was enough to run all our household appliances as needed, including our nearly 4-cubic-foot DC refrigerator, two laptops, a TV/DVD player, and lights at night. However, it was not quite enough power to run all that plus our stand-alone 2.5-cubic-foot DC freezer during the short days and low sun angles of the winter months without supplemental charging from the engine alternator every few days. For the 10 weeks that we did not have a functioning alternator, our solution was to turn off the freezer, which enabled our batteries to reach full charge every afternoon.

Solar power made a world of difference in our cruise. Not only did it allow us to live comfortably and with ample electricity for weeks on end when our engine alternator went on the blink, but as a “set-it-and-forget-it” system, it also gave us the freedom to anchor out for as long as we wished without worrying about the batteries. In our eyes, the solar-panel arch enhanced the beauty and lines of our boat, giving her a sleek and clean appearance. It was true icing on the cake to discover that the panels and arch system also provided much-needed shade over the cockpit and helm from the hot tropical sunshine. If you are preparing for a cruise, consider turning to the sun for electricity and outfitting your sailboat with solar power.

The Installation:

Emily and Mark Fagan offer cruising tips and share their stories and photos on their website, roadslesstraveled.us . They are currently enjoying a land cruise across America aboard an RV.

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

• Phil Sampson

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

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

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

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

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

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

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

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

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

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

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

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

6 of the best boat solar panels available right now

Giosolar 1,000W flexible solar panel

Best flexible boat solar panel

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

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

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

Price: £1,464.45

Buy it now on Amazon (UK)

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

Mobisolar 100W foldable solar panel

Best foldable boat solar panel

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

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

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

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

Price: £145.00

Buy it now on eBay

Eco-worthy 100W solar panel kit

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

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

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

Price: £113.99

PV Logic 20W Flexi solar panel

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

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

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

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

Price: £149.95

Buy it now on Force 4 Chandlery

Powoxi 10W solar panel

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

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

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

Price: £27.59

Eco-worthy 10W/5W solar panel

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

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

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

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

Price: £9.99

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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.

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The Different Types of Solar Panels for Boats

• 1 Monocrystalline Solar Panels
• 2 Polycrystalline Solar Panels
• 3 Thin-Film Solar Panels
• 4 Amorphous Solar Panels
• 5 Semi-Flexible Solar Panels
• 6 Rigid Solar Panels
• 7 Conclusion

Related Posts

As the world’s focus on sustainability intensifies, the allure of harnessing solar power for various applications, including marine settings, has grown significantly. For boat owners and enthusiasts, embracing solar panels offers a gateway to a greener and more self-sufficient way of navigating the open waters. The sun’s natural energy can power boats, reducing reliance on conventional energy sources and minimizing environmental impact.

In this blog, we delve into the diverse world of solar panels for boats , exploring the advantages and characteristics of each type. Whether you sail the vast ocean or cruise along tranquil rivers, understanding the array of solar panel options available will empower you to make informed decisions in embracing renewable energy and charting a course toward a more sustainable future on the waves.

Monocrystalline Solar Panels

Monocrystalline solar panels are known for their efficiency and sleek design, making them popular for boat owners seeking maximum power output in limited spaces. These panels are made from a single crystal structure, allowing them to convert sunlight into electricity efficiently. Monocrystalline panels boast an excellent power-to-size ratio, making them perfect for boats with limited roof or deck space. While they tend to be more expensive than other types, their durability and efficiency make them a wise long-term investment.

Polycrystalline Solar Panels

Polycrystalline solar panels are another prevalent option for marine applications. Unlike monocrystalline panels, polycrystalline panels have multiple crystal structures, slightly reducing their efficiency. However, they are more cost-effective to manufacture, making them a budget-friendly choice for boat owners. Polycrystalline panels are bulkier than monocrystalline panels, so they may require more space for installation. If you have ample deck or roof area on your boat and are looking for an economical solar solution, polycrystalline panels can be an excellent choice.

Thin-Film Solar Panels

Thin-film solar panels are highly versatile and lightweight, making them an attractive option for boats. They are created by depositing thin layers of photovoltaic material on various substrates, such as glass, metal, or plastic. Thin-film panels have lower efficiency than crystalline panels but perform better in low-light conditions, making them suitable for overcast or shaded areas on the boat. The flexibility of thin-film panels allows for easy installation on curved or irregular surfaces, making them an ideal choice for boat owners who value adaptability and space efficiency.

Amorphous Solar Panels

Amorphous solar panels, a subset of thin-film technology, are created by depositing non-crystalline silicon on a substrate. They are highly durable, lightweight, and flexible, making them a perfect fit for marine applications. Amorphous panels perform well in low-light conditions and have a better temperature coefficient than crystalline panels, meaning their efficiency drops less in hot environments. While they may have a lower efficiency overall, their ability to generate power in diverse conditions can be advantageous for long journeys or unpredictable weather conditions.

Semi-Flexible Solar Panels

Semi-flexible solar panels offer a middle ground between traditional rigid and thin-film options. These panels feature a thin layer of solar cells embedded in a flexible plastic or polymer material. Semi-flexible panels can conform to curved surfaces, making them suitable for mounting on boat decks, cabins, or sails. They are lightweight and easy to install, often requiring adhesive rather than bolts. While their efficiency might not match rigid crystalline panels, their versatility and ease of integration make them popular among boat owners.

Rigid Solar Panels

Rigid solar panels, typically monocrystalline or polycrystalline materials, are the most common type in various applications. While they are less flexible than other options, they remain a reliable and efficient choice for boats with ample deck or rooftop space. Rigid panels are durable, weather-resistant, and can deliver higher power outputs. They are ideal for boats with higher energy demands, such as those with multiple electronic devices or appliances.

Solar power is revolutionizing how we generate energy, and boats are no exception to this transformation. As boat owners seek eco-friendly and cost-effective solutions to power their vessels, solar panels offer a reliable and sustainable answer. Understanding the different types of solar panels available for boats is crucial in selecting the right solution for your needs, considering factors like space availability, budget, and desired efficiency. Whether you opt for monocrystalline, polycrystalline, thin-film, amorphous, semi-flexible, or rigid solar panels, embracing solar energy will propel your boat toward a greener and more independent future on the water.

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

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

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

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Solar Panels For Boats and Yachts

By Michael Olenick | Jul 26, 2022

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

Sizing a Solar System for Your Boat or Yacht

• Refrigerator(s)
• Radar & sonar units

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

The Benefits of Adding Solar Panels To a Boat or Yacht

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

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

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

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

Solar Panel Placement

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

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

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

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

Solar Panel Installation Process

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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.

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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.

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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.

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Securing Your Solar Panels

The simplest mounting method for rigid panels is directly to the deck using z-brackets, studs, or glue-on brackets. If mounting to frame above davits or a Bimini top run -inch x 2-inch aluminum bar crosswise under the panel, attach it to the factory-supplied mounting holes, and then attach with rail clamps or brackets (photos 1 & 2) .

Flat panels. Use adjustable studs or spacers to avoid any torque on the panel (photo 3).

Correct mounting points. Frames are factory drilled for proper mounting points that will distribute the load when the boat moves vigorously. If holes are placed incorrectly excessive bending force can result. Alternatively, a supportive aluminum sub-frame can be added to provide additional support. This is particularly advisable for lower cost panels with light-weight frames (photo 4).

Torsional rigidity. Consider a picture frame; with the glass in place it seems reasonably firm, but remove the glass and most are as floppy as spaghetti. Because the panels are sealed to the glass, you don’t want to twist this. You must provide a frame that does not twist as the boat sails.

Frame must be stand-alone. Panel frames are not intended to hold the sides together. We cringe when we see panels with legs attached that apply spreading forces. Of course they delaminate. Bracket-only mounting is only acceptable to a rigid surface, such as a deck or hard top.

Guards. The glass must be protected from impact. However, the guards must not block any sunlight; even a few thin bars can reduce output by 20 percent or more.

Air gap. Panel output is reduced by high temperatures, so an air gap of a least 1-inch should be maintained. A junction box on the underside may also require clearance.

Removable. Though we have never had a failure, Murphy is watching. When we went to add a third panel, easy access to the mounting nuts was a plus.

Railing mounts. While not a favorite, as they must be retracted while docking and in heavy weather, they offer a shade-free setting and minimal weight.

Semi-Flexible panels

The instructions clearly state that regular flexing, even very minor, will result in reduced life of these panels. If mounted on a bimini or dodger the fabric must be firmly tensioned so that there is no pumping in the wind. Even top brands have been ruined by cloth flexing. The dodger must not twist. The panel may not be bent under a snow load.

No ridges. They may not cross ridges on the deck or be placed across a Bimini support bow. They are not suitable for mounting on arches unless continuous support is provided.

Foot traffic. Although some panels can be walked on, this does not mean they should be located where more than rare traffic is possible. Additionally, the instructions specifically state that panels subject to foot traffic be walked on must be firmly bonded to a rigid surface. The panel may not flex under foot in the most minute degree.

Velcro. Semi-rigid panels can mount directly to the Bimini using pockets closed using Velcro flaps, but this can shorten life with flexing. Flexible panels are even more vulnerable here (photo 5).

Screws. Seal all holes against water intrusion by over drilling and epoxy-sealing the core.

Bonding. Use a medium to high strength sealant on the perimeter, such as 3M 4200UV, Sika 295, or Locktite PL S40. Use a weaker bedding compound, such as Sudbury Elastomeric Sealant or Boatlife Caulk for the interior. Continuous bonding is only required if foot traffic is anticipated.

Size. While rigid panels maintain output, semi-flexible panel output will drop noticeably within five years. Plan for it.

3M Dual Lock. Though grommets are supplied, you may find a no-fastener mounting more convenient. These fasteners provides more than five years durability and 15 pounds per square inch pull-out strength.

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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.

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

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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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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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SOL VOLTAICS

SolVoltaics 1043 Garland Ave Unit C #737 San Jose, CA 95126

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

What Types Of Solar Panels Are Best When Creating A Charging System For Your Boat?

S olar systems can be a great way to harness the sun's energy to create electricity that you're able to use when sailing on your boat, whether that's to power all the appliances onboard or to keep the boat's battery charged so you're able to get to the shore safely. In the absence of a solar system, you'd have to rely on shore power or a noisy generator that increases your carbon footprint. But the good news is that thanks to how solar energy has evolved over the years , there are now multiple types of marine-grade solar panels that are available for boats of all sizes.

These solar panels work similarly to those used in residential settings; however, they're marine-grade, which means they're built to withstand the harsher climate of the open waters. If you're considering installing solar panels on your boat, here's a look at the types of solar systems available on the market. This article also covers the pros and cons of installing these solar panels .

Read more: 12 Smart Gadgets You Didn't Know Existed

Rigid Solar Panels

Rigid solar panels, as the name suggests, act as a permanent energy source for a boat. They're usually more durable and efficient than other types of solar panels; however, the installation is more complex and is best left to professionals. They're also fairly heavy — a standard 100W panel can weigh about 20 pounds, making it harder to uninstall and transport as you see fit.

Rigid panels are usually made of two materials — monocrystalline and polycrystalline silicon. Monocrystalline panels are made from the highest grade of silicon, which results in higher efficiency, more durability, and a sleek design that requires less space. Although these panels have a favorable size-to-power ratio, keep in mind that they're often more expensive than other types of solar panels. That said, though, given the quality and how long these panels tend to last, they're a solid choice if you intend to own your boat for an extended period of time. 

Polycrystalline solar panels, on the other hand, are made from fragments of silicon. Because they have multiple crystal structures, as opposed to monocrystalline panels that have a single crystal structure, they're more bulky and less efficient. The benefit, however, is that they're more economical. If space is not a constraint and you're on a budget, polycrystalline panels might be the way to go.

Flexible Solar Panels

Flexible solar panels — usually made with thin-film photovoltaic cells — are an alternative to traditional rigid panels. They're lightweight and flexible, which allows them to bend for installation on curved surfaces, and inexpensive when compared to rigid solar systems. Another big positive is that although they're pretty flexible, they're usually durable and can hold up well against adverse weather conditions. The downside, however, is that they're less efficient than rigid solar panels, which means you'll need to install more of these panels to meet your energy needs on the boat. Another thing you'll want to consider is that flexible solar panels usually have a more limited warranty than rigid panels.

While it's not uncommon for these panels to last a number of years, the warranty itself might last only up to five years. Any repairs after the warranty period has come to a close will, thus, have to be covered by you out of pocket. Despite these drawbacks, they're popular for boats, given that they can be installed on most surfaces, even if they're low-load-bearing, and are easy to uninstall. They're also a good choice if your boat already has a solar system but you want to supplement the power generation in an affordable way.

Semi-Flexible Solar Panels

Semi-flexible solar panels offer many of the advantages of rigid solar panels, with the flexibility and lightweight construction of flexible panels. These panels are usually made of polymer or flexible plastic material that contains a thin layer of solar cells — usually monocrystalline cells. Because the body of the panels is flexible, they can be installed on curved surfaces like flexible panels, making them well-suited to being installed on boats. Also, because they're fairly lightweight, you can do without bolts when installing them and, instead, use a quality adhesive to hold them in place. They're also more aesthetically pleasing than rigid solar panels that have to be installed flat on surfaces.

Keep in mind, though, that they're not as efficient as rigid solar panels; yet, their thin and moldable construction makes them a viable option when rigid panels are not feasible. This makes them a popular option among boat owners, especially those who were looking to install traditional panels but were unable to.

Portable Solar Panels

If space is limited and you want to avoid having to install and possibly uninstall the solar panels in the future,  portable panels are an option worth considering . They're pretty affordable and versatile, given that you can use them to power your boat but also, say, take them to a campsite to power your appliances there. Also, because they're not fixed to a surface, you can manually move the panels around to face the sunlight so they capture maximum energy.

While this type of solar panel has its benefits, there are also a few pertinent downsides to consider. For one, while many portable solar panels are foldable, you're likely going to need more than a few to power up your boat, which increases your cost and reduces the convenience factor slightly. What's more, keeping them free of damage during transport can be challenging. If you decide to purchase portable solar panels for your boat, keep in mind that not all have the same quality or waterproof rating. Make sure you're picking ones that have an IP68 rating to avoid damage due to water splashes.

How Many Solar Panels Will You Need?

The size of the solar system you install will depend primarily on your location and energy consumption. To determine how many solar panels you will need, take a few minutes to calculate your power consumption. Be sure to account for all your appliances and energy needs to arrive at an accurate estimate. You can then determine how much solar power and how many solar panels you'll need.

When shopping for solar panels, you're likely to come across the wattage of the panel in the title or as a key specification. This is the amount of power the panel can generate. If you purchase a 200-watt solar panel and are sailing at a location where you're likely to get five hours of sunlight, your panels should, in ideal conditions, provide you with 1,000-watt hours of power. That said, remember that solar panels don't usually operate at their peak efficiency, given that factors like panel orientation, weather conditions, and dust can affect their functioning.

So, if you need 1,000-watt hours of power, it's best to opt for a 300-watt or 500-watt solar panel that is capable of generating more power than you need. Excess energy can be stored in a battery for you to use during the night or on rainy/cloudy days. If you estimate a significant gap between your energy needs and the amount of power the panels can generate, you can install more panels or get rigid panels that are more efficient.

Cost And Other Considerations

The cost of marine solar panels can vary significantly from $100 to a few thousand dollars based on the type of panel you purchase, its wattage and efficiency, and the brand you pick. Monocrystalline rigid panels offer the highest efficiency, and installing them can be tricky, so they often command a high price — these panels can cost upwards of $500. Other types of panels, especially flexible and portable options, are usually more affordable, but be sure to check the efficiency and the IPX waterproof rating before you make a purchase. If you'd like to save money, look for off-grid solar panel kits available on sites like Home Depot and Amazon.

Apart from the upfront expense, you'll also want to consider the maintenance and installation costs. Heavier solar panels that require mounting brackets will likely cost more in time and money to install, as opposed to, say, portable panels that you can carry on to the boat with you.

The space available on your boat is also something you'll want to account for when choosing panels. While flexible panels might be less efficient than rigid panels, the fact that you can install them pretty much anywhere, even on curved surfaces, means you can maximize your power generation with these more affordable panels.

Read the original article on SlashGear