I wanted to correct a statement I made a few days ago. I said that
When the van is running there is a solenoid that operates. This solenoid connects the coach batteries to the van alternator which charges the batteries/supplies 12VDC to the coach.
I misspoke when I used the word solenoid. It is actually a relay that operates. I happened to be at the factory today and talked to Kermit about it. He said it is not a solenoid or diode but a relay. He stopped using diodes many years ago because he said he had too many failures.