High Wattage Solar Panels

brichards

https://forum.solar-electric.com/discussion/comment/392739#Comment_392739

I am mounting these 435 watt Sunpower panels on my RV.

These are the most efficient panels made today.

Avg. Panel Efficiency 20.3% 

https://us.sunpower.com/products/solar-panels/

I am buying these E series commercial panels. I am getting these for $300 each, the more I buy the cheaper they are.

Never buy any junk from Alibaba.. These Sunpower panels are used in solar farms,

https://us.sunpower.com/utility-scale-solar-power-plants/

BB.

Be careful when using/specifying the higher wattage panels.

Some are in the Vmp~50-78 VDC or so range. If you have a 48 volt battery bank in a very cold climate, the Voc-cold rating can exceed ~140-150 VDC if you put two panels in series. And one panel's Vmp is (may) not high enough voltage to properly charge a 48 volt Flooded Cell Lead Acid battery bank.

-Bill