As long as your charge controller is proper, no issue, your batteries will charge faster than with a single panel, or smaller panel(s). But they won't over charge, or anything like that. The charge controller will feed the batteries as much as it can as fast as it can, without hurting them. You will have excess power production, with no way to store it, but that is better than excess storage with no way to fill it.. LOL
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2011 R-Pod 177.
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