70 Watt Flexible Marine Solar Panel - Sunpower A+ Grade 24.4% Efficient Cells
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70 Watt Flexible Marine Solar Panel - Sunpower A+ Grade 24.4% Efficient Cells
Lightweight, flexible, and ultra-efficient solar power solution for marine, van, and off-grid use.
The 70 Watt Flexible Marine Solar Panel offers powerful, space-efficient energy generation for boats, yachts, vans, and off-grid systems. Built with SunPower A+ Grade Maxeon solar cells, this panel achieves 24.4% conversion efficiency, capturing more sunlight and producing more power per square inch than conventional panels.
Designed to conform to curved or uneven surfaces, these panels are ideal for mounting on a canvas / bimini top or a curved deck surface. It features a durable, weatherproof construction and includes mounting grommets, MC4 connectors, and blocking diodes for safe, reliable operation.
At just 4.5 pounds, this panel is ultra-lightweight yet engineered to handle the harshest marine conditions — from intense UV exposure to saltwater spray. Its flexible design allows easy installation on any deck or roof without compromising performance.
Ideal for powering navigation equipment, refrigeration, lighting, and batteries, the CMPower 70W Flexible Solar Panel is the perfect choice for cruisers and adventurers who demand efficient, dependable solar power in a compact footprint.
📦 Ships Next Day UPS Ground from Denver or Michigan.
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⚡ Key Features
- High-Efficiency SunPower Cells – Equipped with A+ Grade Maxeon cells for up to 24.4% efficiency, among the highest available.
- Flexible & Lightweight Design – Easily mounts on curved or soft surfaces such as bimini tops, canvas, or decks.
- Easy Installation – Includes mounting grommets, MC4 connectors, and blocking diodes.
- Low Profile – Slim, aerodynamic design reduces drag and wind resistance on boats or vehicles.
- Quiet, Maintenance-Free Power – Generates clean energy for batteries, electronics, and lighting with no noise or fumes.
- Compact & Portable – Perfect for small boats, van conversions, or portable solar applications.
⚙️ Specifications
| 70 Watt Flexible Marine Solar Panel | |
|---|---|
| 🔧 Model | CMP23070FX |
| ⚡ Rated Power | 70 Watts |
| 🔋 Peak Power Voltage (Vmpp) | 22.8 Volts |
| 🔋 Peak Power Amps (Impp) | 3.1 Amps |
| ⚡ Open Circuit Voltage (Voc) | 27.3 Volts |
| ⚡ Short Circuit Current (Isc) | 3.3 Amps |
| 🌞 Cell Conversion Efficiency | 24.0% |
| 📏 Dimensions | 21.25" x 27.75", 540 x 705 x 3 mm |
| ⚖️ Weight | 4.5 lbs, 2.0 kgs |
| 🧱 Substrate | Lightweight Fiberglass |
| 🔲 Background Color | White |
| 🧩 Cell Layout | 4 x 10 (10 are half cells) |
| 🛡️ Warranty | 5 years |
I ordered the CMP23115FX-120-ST panel for a special project on my Toyota Tacoma to create an on board solar generator to charge the main battery and a lithium battery. The first panel I received was defective, it generated random voltage and no current so I pretty much chalked it off to the protective diodes in the junction box. I contacted Tom and let him know everything I could tell him without disturbing the sealant in the junction box. He quickly put me in touch with Cindy to arrange a replacement. I have received the replacement and am very impressed with the improvement of quality in the new junction box which has cable restraints and better cable which is easier to work with when installing. The new one also seems to have upgraded solar cells. Guys thank you very much for looking after me in my custom truck generator! Also to everyone else, you’d be taking a chance if you don’t obtain your solar needs from these guys!
Brenon
I did a search for a solar panel system for my Bavaria 35 and Tom's website was the most clear and straightforward website I found. And Tom was extremely helpful in helping analyze my electrical load needs. He put together a great system of semi-flexible panels to be located on my bimini, two 145 watt panels and two 55 watt panels. They work great. I highly recommend Tom and his company, Custom Marine Products.
did just what I wanted; kept the batteries up over the winter
Easy installation and it’s pushed us over the line in sustaining our demands to run the boat’s loads through the day in the Bahamas!
We installed two 155 watt panels, and two 120 watt shade tolerant panels one year ago. These have generated more than enough power to run refrigeration overnight at anchor. The panels are bimini mounted with the shade tolerant versions near the boom. I highly recommend the shade tolerant versions as in practise they perform as well as the higher wattage panels.
Harold Beer, Lansing, MI
March 25, 2025
I bought and installed this unit with Tom's help and advice over email back in 2020 and it has been a huge help ever since. It makes our battery bank seem twice as big and has taken a decent amount of abuse occasionally getting walked on.
Couldn’t be happier.
These are "walk-on" rated, correct? Need a small panel next to mast, where someone needs to stand while raising/lowering the sail...
This 70W flexible panel is not rated as a walk-on panel. For applications where people may need to step or stand on the panel, we would recommend our Walkable Semi-Rigid Solar Panel Collection instead.
Link: https://www.custommarineproducts.store/collections/semi-rigid-walk-on-marine-solar-panels
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