Simply Unbeatable | More Power in Less Space

SunPower® 50W E-flex solar panel - spec sheet


This 50Watt flexible panel is perfect for smaller boats or to trickle charge your batteries when not aboard.  Made with SunPower® 23% efficiency Gen II prime back contact cells, SunPower® flexible panels deliver the highest power output and the highest charging capacity in their product class. SunPower® panels are constructed with top-grade, lightweight polymer materials, allowing for easy transport, installation and panel flexing up to 30 degrees.


How much power will I get? With a 12V system an estimated daily yield for a single 50W panel is potentially around 16-17 amp hours.


Which MPPT controller do I need? With a 12V system pair a single 50W panel with a Victron 75|10, pair 2x50W panels with a Victron 75|10, pair 3x50W panels with a Victron 75|15.


Federal Tax Credit Net Price = $73.26 after filing & receiving the 26% Federal Tax Credit in 2021 (saving you $25.74 per panel)  More details on our Solar Tax Credits page


Have a 24V/48V system? Need more help sizing your MPPT charge controller? Have other questions on the SunPower® 50W?  Visit our FAQ page or contact us, we're happy to help.

50 Watt

  • SunPower® 50W E-flex solar panel


    • Dimensions: 25.5"(L) x 21.9"(W) x 0.1"(H) (0.8" including J-Box)

    • Weight: 2.4lbs - Lightweight, Portable & Easy to Stow

    • Rated Voltage (Vmpp) 17.7V | Rated Current (Impp) 2.8A - Powerful

    • Flexible up to 30 degrees - Suitable for Irregular Surfaces

    • 32 High efficiency (23%) monocrystalline Maxeon™ Gen II prime solar cells - More Power in Less Space

    • Premium cosmetic quality

    • Junction box with by-pass diode has IP67 protection- Robust Design, Water & Dust Proof!

    • 17.7" long cables (12AWG) with PV4-S connectors (MC4 compatible) - Reliable & Safe with IP68 Protection

    • 4 x 316 Stainless steel grommets -  Diverse Installation Options

    • 5-Year power & 2-Year product warranty (no salt water exclusion) - Backed by SunPower

    • Solar cells are made & panel is assembled in the Philippines

    • Individually packaged & protected for shipping. Includes safety & installation guide

    • Spec sheet (pdf)

    • Marine flyer (pdf)

    • Installation guide (pdf) Rev F


SunPower 170W E-flex solar panels

So now I generally

don't bother hooking

up to shore power!

Thanks for all the help in planning my solar project for my boat. The two 170W flexible panels fit well on my Bimini and now I generally don't bother hooking up to shore power.  Although I haven’t had any long trips since my installation I have done a few day trips. And even with fridge, radio, plotters, autopilot and occasional radar it seems that these panels are keeping up with my usage. I did add some stiffener material to the back of the panels and attached the panels with zippers and they have survived a few 30 knot days and one night with winds gusting well over 55 knots. No damage at all and no signs of flexing problems. 

The advice and service has been great.  Thanks again.



Jeanneau Sun Odyssey 469

high efficiency flexible solar panels

It made my project

work, thank you

Lyall and Katie are so knowledgeable.  I tried this project with a lesser quality panel and the project failed because it wasn't efficient enough. The SunPower® Maxeon Gen III cells are compact and simply kick out more Volts/Current than all the others on the market today.   And by using the SunPower® panel, everything was smooth and efficient.  I love my new 170W 29V 5.83A panel!!  It made my project work.   Thanks Lyall for all your knowledge in making this work. 


E-recumbent trike & trailer

Terrific customer service, patient, always responsive

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


Beneteau 41

SunPower marine solar panels
ABYC member
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