My 2006 Hurricane will charge all the batteries from all power sources, shore thru the converter, generator thru the converter and engine from the alternator. Once the primary battery (house when using shore/generator or chassis when the engine is running) reaches 13.2 VDC the Battery Control Center will close the Aux Start solenoid and tie the two banks together and charge all. If the BCC senses a voltage drop on either bank it will open the solenoid and protect the banks from each other and a possible complete discharge of both.
There is a down side to this. My house batteries are golf cart deep cell while the chassis is a standard start battery. When on shore/generator the converter will go thru a three stage charge of both banks. Not sure what the long term effect this has on starting batteries. I could just activate the chassis battery disconnect to prevent.
