Originally Posted by organize4u
My question is, does the battery on/off switch in the van have to be ON while you're driving for the battery to charge or does it matter?
Unless the wiring or charger has been changed from stock it shouldn't matter.
To tell for sure run down you batteries a couple of lights on the status panel and then with the switch off start the engine. All the lights should light then although you may have to rev the engine a little sometimes.