When I plug into shore power, everything works great. When I unplug, nothing works. I tested the camper battery and was getting 12v from it. I replaced all the fuses I could find. I have an isolater and a camper battery kill switch under the hood. This wasn't an issue previously but I recently had a new alternator put in because the previous one failed - when I got the camper back I couldn't get things to work without plugging in. The power panel, however, works fine. It lights up and shows the battery level etc. If I hit the kill switch under the hood, the panel won't work. For the life of me, I can't find the converter or any other breakers or fuses. I'm at a loss as to what's wrong. I am attaching a picture of what it looks like when I open the back hatch, where I plug in and also the fuse panel / breaker. Any help would be greatly appreciated. ?????♂️?