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Kd7vea's avatar
Kd7vea
Explorer
Apr 14, 2020

What solar panels, and what charge controller do I need?

I’m hoping you can help me with this, or at lest point me in the right direction. I have a motorhome that I’m going to add solar panels to. I have 12 100ah gel cell batteries. These are alpha cell 1...
CA_Traveler's avatar
CA_Traveler
Explorer III
Apr 14, 2020
For flat panel estimates I use 67% of the panel watts. Most of a clear summer day will be under 40A. At noonish on a clear summer day the controller will limit you to 40A. Maximum battery charging amps (assuming no house loads) is 40/number of batteries.

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