Originally Posted by sdelam
You dont have an inverter feeding the whole trailer by chance? Just a guess but an electric hot water heater powered by an inverter my cause it if the battery cables arnt big enough.
This could do it; or any other high draw item left on that was not fuse protected.
Normally, it is a "home rolled" inverter with no required inline fuse.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW