Originally Posted by TURBS
Did you hook up the battery / batteries backwards?
2015 Columbus 320RS
2008 2500HD Duramax
2015 nights camped "34"
He said things work fine if he disconnects the battery before plugging the cord in. When he connects the battery back up nothing trips, things work fine so that can't be the problem.
Sounds like a battery problem causing a heavy load on the converter when it is turned on with the battery hooked up. My question then becomes, why doesn't the breaker trip when he hooks the battery back up? If being caused by the battery when it was hooked back up the converter would see the same load, right? Could it be the 12 volt charger side of the converter is bad? The OP needs to check the chargers output as well as the battery/batteries.