Originally Posted by wbdvt
The battery will only be supplying any current to loads when there is no shore power. Since the wires were hot when connected to shore power, that indicates the current flow is into the battery as the converter is providing power to any dc loads when connected to shore power.
I still think the problem is your battery.
BINGO, battery was registering 10.2 volts at the shop, BONE DRY, and had signs of overcharging, which im praying is due to the low levels of fluid and not the converter. I will just keep an eye on output voltages on the battery. Really chaps me that the original owner didn't take care or the actual systems on the trailer but kept the inside spotless. gallon of distilled water added to list of essentials.