Scoop
Well-Known Member
Lifetime Member
Supporting Member
You can't just charge one if the isolator is doing what it's supposed to do.I stand by my comment. All that info and the original question still wasn't answered. "My question is why does it appear as though both batteries seem to take the charge when I'm only charging one battery? You stated previously on Dec. 14- "The isolator keeps the batteries separate when voltage drops to 12.9v or below. Conversely, when voltage gets to 13.4v (whether when the vehicle is running or you are charging the batteries), the isolator connects the two batteries (in parallel) and begins charging them simultaneously." and clearly used the term "connects" which implies it was disconnected so you really haven't made a point other than to confirm the accuracy of my comment.
If you understood the purpose of the isolator, you wouldn't be asking this question again (which was most certainly answered).