electrical issue

Assuming you haven't inadvertently bumped the salesman switch, you issue can be traced to one of two items. The inverter breakers have already been discussed but the only thing not mentioned was the breakers might be the push button type which unless you know what to look for are easily missed. Lastly, you might have to begin searching for that elusive hidden GFCI. I think it's a game the guys building these things play with us end users. I had one in the engine compartment. Check the salesman switch, check the inverter breakers and finally start hunting for the hidden GFCI....Dennis