My 2005 Cresendo, Freightiner, Cat 350, doesn't charge the house batteries from the engine when in motion and doesn't charge the chassis batteries when on shore power.
I did a lot of testing in the 12 volt compartment and thought I found the White-Rogers solenoid to be bad. I replaced it.
I understood the solenoid would allow the engine to charge the chassis batteries until there was a significant voltage differential between the chassis and house batteries, then connect the house batteries to the engine batteries, allowing the house batteries to be charged.
I understood the same was true - in reverse - for the shore power/converter-charger to first charge the house batteries, then charge the chassis batteries.
Just completed a trip. After one week while still connected to shore power, I found the house batteries at 13.31 volts and the chassis batteries at 12.43 volts.
After 2.5 hours driving home, I found the chassis batteries at 13.06 volts and the house batteries at 12.29 volts.
Either I was wrong about the function of the W-R solenoid or the motor home is not designed to maintain both sets of batteries simultaneously, or I might not have a clue how all of this works
By the way, the W-R solenoid did and does function properly in the combiner mode for house battery assisted starting.
Please help me understand.