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Old 11-16-2007
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Either case. If your aux power sources are supplying power while you are also charging it via alternator or shore power, the voltage from the aux source can fool either circuit that the battery is fully charged.

FWIW, I'm not sure how realistic it is to keep a large bank charged with aux sources, unless your A hr consumption is crazy low. And unless you have a great regulator, you still have the problem of improper charging regime for the batteries.
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