Kettner,
Where is the circuit breaker near the battery, is it visible? I don't recall ever seeing one in the outside battery box. I'll look again as I might of missed it.
WNJJ.
Battery is reading 12.79V at all times, with shore power and without shore power. Lights are no existent without shore power, but power up with shore power. Same with any other appliance... No good without shore power and good with shore power.
I checked the output that the converter and it is reading 13.79V. Not sure if that helps the group.