EnVe942 - Thanks for helping get the pictures posted. Yes it appears that one of the blades came loose and was arcing when the AC was running. It looks like only about 8" of wiring melted. Fortunately we got a battery charger and are keeping the batteries charged up and are enjoying our time at the lake. I'm not sure if it's necessary but I shut off the 12V system while charging just to play it safe. HMS Beagle - Thanks for the link. This is the first camper we've owned that wasn't hard wired. I'll look into that plug set.