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Old 01-07-16, 05:19 PM   #18
doug30293
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Join Date: Nov 2013
Location: georgia
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OK, new problem. I have a converter/charger in the RV of the type known to destroy batteries. A new 4 stage Iota 45 amp converter is $187. Not bad but is it necessary?

The MPPT provides four stage charging when the sun is shining and becomes a brick when the sun goes away. Rather than buy the Iota would it not be simpler to provide a backup DC source for the MPPT in lieu of the PV array? A simple current limiting supply can be built for much less than the price of the Iota.

I can provide 120V to the supply from a generator or the pedestal at an RV park. Having one charging device means I only have to monitor one system.
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