Is there a way to disengage the inverter charger when connected to shore power? We accidentally pulled the plug from shore power but did not turn off the breakers beforehand. Now coming back to the harbor the inverter charger shows higher voltage than then analog voltage meter. How do we get the inverter charger voltage meter back in sync. We have tried turning it off for more than 40 minutes and still get an alarm. If we cannot get these in sync is there something that we can do to insure we do not draining the house batteries?