Charging battery

Just wondering, if you connect a converter to the camper battery, then plug a battery charger to it.   Could you connect the charger to the battery also and constantly maintain full battery charge.

Okay. I see I missed the point. If you connect an Inverter, not a converter and a battery charger. That still presupposes that you have AC power available. In that case, my reply about a charger still applies. It makes no sense to hook up a 15A charger to the battery when you have a 55A converter already available to charge the battery. Now as for the inverter, if you already have AC available, why bother with an inverter? In any case, if you insist in using one, as long as your inverter draw is below the converter or charger capacity (say 300 Watt inverter (about 12A) and 55A converter, you should be able to keep the battery charged. If you go to a 1000 Watt (about 83A) Inverter, you would need one whopping charger to keep up. The RPod's converter would not be up to the task. 

So, energy from the 12V dc battery passes through an inverter that changes it to 120V ac. About 15-20% of the energy you start with is lost as heat doing that. Then you send that energy through a converter that changes it back to 12V dc and sends it back to the battery. That conversion process loses another 15-20%, also to heat. By the time you’re through with that whole loop only about 65-70% or so of the energy you started with makes it back to the battery. So it’s a good way to discharge a battery not keep it charged. You may as well just run an electric heater, that will have the same effect.

To keep your battery charged, you need an external source of energy. That could be a pedestal, solar, a generator, your tow vehicle engine, or even you pedaling an excercise bike with a alternator connected, but it has to be something other than the battery itself.