Don, your outlets MAY be protected by a ground fault circuit breaker in one or more of the outlets. I know I have some of those miserable things in my trailer. If you have those, check them to see if they are still engaged.
Other than that, I believe the outlets are all protected by one or more circuit breakers on the circuit breaker panel. Have you checked those?
The lights are all 12V, and they run off the battery, which is recharged through the converter.
- Jack