Originally Posted by bubb2
No John, that black one is the electrical disconnect, the one you don't want to touch when the engine is running!!!!!
Just kidding. I don't think they ever fiddle with them, but I'll be sure to remind them.
On their boat, they only have two batteries, and they are connected. In other words, either one can be selected and used as the starting battery, and they can be used singly or in combination as a house bank. That might be different from Tim's set-up?