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casefarmri's avatar
casefarmri
Explorer
Apr 11, 2017

Solar panels to keep coach batteries charged over winter

I am trying to get info on what size(watts, amps, volts)solar panel I would need to keep coach batts charged. I am only able to store coach at end of street at private lot an there is no outlets. Went...
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CA_Traveler's avatar
CA_Traveler
Explorer III
Apr 12, 2017
Hank MI wrote:
Most small battery maintainers are 1.5 to 2 amps and do the job quite well.
Yes but they are also charging 24 hours a day while solar not so much.

I plan on about 2/3 of the panel wattage for 4-6 hours a day for my flat mounted panels. Tilted panels are an improvement. Tracking panels are another step up but very few have that capability.

A 15W panel might not keep up with the self discharge of a battery.

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