AC/DC upgrade

Imagine wrote:
I am upgrading the electrical in my Class C. I just installed an Ultra III 55 amp converter to replace the old Magnatek to get better battery charging.

Is that a WFCO? These are notorious for not switching to boost mode when expected. If your batteries are 50% low you should see voltage steadily rise above 14.0. I hope it works as expected.

Does the panel look OEM or installed by a prior owner? Could be a battery disconnect relay or an isolator system to allow some charge from the alternator. Or something else such as automatic generator start. A pic or part number will be needed unless someone has the exact set up and see this.