First Post - about electrical system of course

That's good to know. Definitely different than having a battery in a truck that doesn't drain very fast. On the battery terminal there is a knob that can be turned counterclockwise to disconnect the battery. That might be a disconnect switch of sorts that a previous owner probably put on. What I'll do is keep the trailer plugged into the house with the battery disconnected, then a day before we take out the TT I can re-connect the battery to let the converter charge it up.