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Old 06-08-2016, 07:14 AM   #16
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Join Date: Oct 2007
Posts: 18,252
"Maybe there is a combiner in the mix and at float it is isolating the battery you are testing."

Combiners require the batt voltage to somehow shown to the charger or constant undercharge is the result.

For most boats the RV setup , an $18. buck solenoid does not include these dangers.
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