I an converting a van to an RV using a Ford Transit. I have batteries that go to an inverter to get AC power from the batteries. DC power is OK. I have a battery charger I use when hooking up to AC power. My question is should I use a battery charger or an AC to DC converter when I use a generator? Does it make a difference which is used ? AC hookup can charge the batteries overnight quietly, but the generator can only run for a short time. Does the converter charge the batteries faster than the battery charger ??