12volt stuff. It's strange because if plugged into outlet, shouldn't this bypass battery?
The convertor should run the lights. did you check your out put of the convertor with a meter? 110v in and 12 volt out. Make sure your convertor didn't take a hit. There are 2 auto type fuse's to check on the panel. Look up in the lib. about checking your power to the convertor. I would start there.
Rockwood #8289 WS 2012
F250 6.0 / Husky 16k
With 4 point leveling system