Maybe someone else can be more exact than I can, but here is an easy way to find out--
Get you a digital voltmeter, while connected to shore power, and check the voltage across the house batteries. You should read 13.3v to 13. 8v, or so. If you read the same voltage across the chassis battery(s) your getting charged through the converter. Caution- Do it at night if you have a solar panel on the roof.
If you read about 12.3v on the chassis battery(s) your not getting charged through the converter.
2002 Newmar Mountain Aire, 37', 3778, W-22, 8.1 Vortac, Ultra Power upgrade, CAI (cold air intake), Taylor wires, colder plugs, Koni shocks.