Quote Originally Posted by Jon Wehrenberg View Post
What concerns me is why the need to keep a charger on chassis batteries. That suggests a load on the batteries (or failing batteries) when the bus is stored. I can literally allow my coach (both that I have had) to sit for as much as 3 months and the chassis batteries will still be at 24.5 volts or so, more than enough to start the caoch.

I would seek the reason a charger is needed.
Jon, I installed mine because locking and unlocking the doors while in storage or staying in the coach for extended periods will run the batteries down.