I was told by the dealer that when plugged in to shore power the onboard charger takes care of the house batteries but not the engine start battery.
As such I keep my 24.1 on the shore power cord but also have the engine start battery plugged into a battery tender which is a small maintenance charger.
Don't know what popped your breaker but can tell you that with shore power and the battery connected I have had no problems with my rig.
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