Jon,
You can probably see where I'm going with this. If a high amperage path already exists allowing the 50DN to charge the house bank as well as the chassis bank, then a high amperage constant use solenoid is already in place and it would be a simple matter to add a control wire and switch to allow the inverter/chargers to charge the chassis bank. Apparently someone thinks it's okay for the 50DN to charge a disparate collection of batteries; i.e., start lead acid chassis mixed with AGM house.
Jack,
Your air seal probably only takes 10 to 15 psi. I suspect prevost wants 110 psi so that it can perform airbag leveling prior to slide extend/retract???