I have a 2007 Bighorn 3055RL which has two batteries and a shut off switch for those batteries. I recharge the batteries by connecting the fifth wheel to shore power as opposed to connecting a charger directly to the batteries. Will those batteries recharge if I have the switch "off" or must the switch be "on" in order for the batteries to recharge. I ask because when the switch is "on" the batteries are being drained by appliances inside and will take longer to recharge. But, it seems that the batteries would recharge faster with the switch "off" because they are not being drained.