I think I mean to ask about the converter. we had to purchase a new battery for the pop up, and chose a group 27 deep cycle. I've installed the charge controller and wires to use our 100 watt solar panel, and connected the new battery to the pop up. the only things that will use any amps to consider while we are camping, are the furnace fan and the water pump. On our older (1995) rv, we have mistakenly left the camper plugged in, and I think it has damaged by overcharging the 2 deep cycle batteries we have connected to the coach. we have gone to a trickle charger for that camper. But, I think (!) being a 2010, our pop up has a "smarter" converter, and leaving the battery connected to the camper, and the camper plugged in to 110 shore power won't hurt the new battery. do I understand this correctly? Or should we disconnect the battery from the pop up and purchase a second trickle charger for the pop up?