285 Watt Rigid Solar Panel - Sunpower A+ Grade 24.4% Efficient Cells

$1,299.00
$1,299.00
Shipping calculated at checkout.
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285 Watt Rigid Solar Panel - Sunpower A+ Grade 24.4% Efficient Cells

Shipping Notice:
Due to the size of this panel, shipping is not free. A $100 shipping credit is applied, you only pay the remaining shipping cost at checkout.

Experience superior marine solar performance with the 285 Watt Rigid Solar Panel, built with SunPower A+ Grade Maxeon cells—the most efficient solar technology available today. Delivering an impressive 24.4% cell efficiency, this high-output panel is designed for boaters, cruisers, and off-grid users who demand reliable energy in all conditions.

Engineered for maximum performance in shaded and full-sun environments, this panel uses shade-tolerant solar cells and integrated diodes to maintain power output even when sections are partially covered by masts, booms, or rigging. Built with a durable marine-grade frame, it’s ideal for arch, davit, deck, or pole mounting on 12V, 24V, or 48V systems.

Perfect for tight spaces or high-demand applications, the 285W rigid panel delivers maximum watts per square foot, ensuring you get the most power from limited space.

✅ Ships within 1 business day via UPS Ground from Denver or Michigan.

Key Features

⚡ High-Efficiency Power: SunPower A+ Grade Maxeon solar cells with 24.4% conversion efficiency
⚡ Maximum Output in Shade: Shade-tolerant cell design and bypass diodes maintain consistent energy flow
⚡ Built for Harsh Marine Environments: Rigid, corrosion-resistant, and long-lasting construction
⚡  Versatile Installation: Ideal for arch, davit, pole, or deck mounting on boats and off-grid setups
⚡ Compact & Powerful: Maximum wattage per square foot for space-constrained applications
⚡ Great if you are space constrained and need maximum power

Specifications

Model: CMP22270SX-285
Rated Power: 285 Watts
Peak Power Voltage (Vmpp): 47.1 Volts
Peak Power Amps (Impp): 6.0 Amps
Open Circuit Voltage (Voc): 55.6 Volts
Short Circuit Current (Isc): 6.3 Amps
Cell Conversion Efficiency: 24.4%
Dimensions: 36.2" x 56.9", 920mm x 1445mm
Weight: 31.3 lbs, 14.2 kgs
Background Color: White
Cell Layout: 7 x 11

 

  • 5 stars: 8 (100%)
  • 4 stars: 0 (0%)
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This product has no reviews of its own. The merchant grouped it with related products, so the reviews shown are from across that group.
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Michael Gillingham
Great Products and great service.

We are the second owners of a Seaward 32RK. The original owners had installed semi rigid solar to the bimini that failed. I spent a long time searching for rigid panels that would fit our boat. Then I came upon Custom Marine Products and saw that they offered the 175W rigid panels. These are ~3'X3' and would fit perfectly above the bimini. Tom Sr. and Tom Jr. were both great to deal with. They helped me get it figured out and had everything I needed to purchase at a fair price. The panels are excellent! They put out everything they should and are very high quality. I couldn't be happier with them. Now we never worry about our house batteries being topped off. If I have a question to this day, they still remember me when I call. I highly recommend their business to anyone I meet. Thanks guys!

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Bruce M.
Great product and wonderful support

Someone answered the phone everytime we called and always had answers. provided everything we needed for a complete installation. We contracted a professional marine installer and she says this is the best supplier she has ever worked with.

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Peter M.
Incredibly fast shipping

Haven't installed it on the boat yet but this a substantial solar panel. Incredibly fast shipping. Also got the regulator and the wiring. I am good to go!

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Maciej Laskowski
Great product, great support

I wanted to replace my then solar panel installation of 300W with a more powerful set up. I chose set of four CMP22200S panels for a combine power of 800W. During this selection process I'd got a great support and advice from Tom. After re-working my solar arch and installing those new panels I could not be more please with their quality and performance. They are capable to supply their nominal power of 800W as per their specs and maintain my battery fully charged during a day. Great product with outstanding support.

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Mark James
Great advice, great products, great people!

Tom Sr. Worked with me on a solar installation last Spring. I sized (2)200 mono crystalline rigid Sun Power panels with victron mppt and battery monitor. The spreadsheet he created to figure out solar needs is the best I have seen. Love this system! My wife and I spent the summer on the Great Lakes and other than a very old refrig/feeezer compressor the panels kept up with all systems including our autopilot!

The best ting about Tom (and his son Tom) is that they truly want the best solution, not the sale. Most knowledge in marine solar I have come across and while the products aren’t cheap they are priced fairly for being some of the most premiere solutions available. And the after sales service is spectacular. We heartily recommend them and will use them again as the need arises. Thanks Tom!

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Mark M.
Great customer service

Great customer service and communication.

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Philippe F.
Great customer service

Shipping was timely and panels arrived on time.

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