I have 2 twelved volt batteriies in my Grand Design. will it maintain them in the off season? (Zamp Solar USP1001 90 Watt Portable Charge Kit)

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Zamp Solar USP1001 90 Watt Portable Charge Kit

The Zamp Solar USP1001 90 Watt Portable Charge Kit features a 10 Amp weatherproof solar charge controller mounted on our EZ-View swinging bracket.

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