HELP Electrical problem!

cmcdar wrote:
Battery was quite low so put a charger on it, while still connected to the camper. This morning I go out to check the voltage of the battery and it is "boiling".

I had disconnected the power to the the charger so there was no charging overnight. This morning the charger was humming and the battery is 'boiling' (hot, battery acid coming out the top). I disconnected the charger and disconnected the battery from the camper. It was almost as if the power was flowing from the camper to the battery (camper plugged into shore power - regular house extension cord).

Need a bit of clarification.

It sounds as if the camper has a converter/charger in it already, but, you said 'battery was quite low'. Do you mean voltage? And if so, was the camper plugged in when you took that reading? Power is supposed to flow to the battery if there's an on-board charger.

Did you check the battery water? How old is this battery? I imagine very few used trailers have a) a good battery b) good tires.

One or both of your chargers is a stupid one, and was overcharging.