When hooked up to shore power GFI, it trips after sitting a while. I turned off all switches on the panel in the MH, then re-set the gfi, had someone watch gfi and went to coach and turned on switches one by one, when I got to Microwave switch it blew the gfi. Un-plugged the microwave and thought I had it fixed but tripped the gfi again. Could this be the switch/breaker or possibly in the convertor. Any suggestions greatly appreciated. Thanks, Mel.