Thanks 2oldman. If your converter is only 85% efficient that is the same as having 15% smaller batteries. Of course if your 12v needs are only 10% of your total needs that 15% loss is only 1.5% loss in battery capacity - a negligible amount.
I plan on using an AIMs 2,000 watt PSW inverter/charger. http://www.theinverterstore.com/2000-watt-pure-sine-inverter-charger-48-volt.html
You could just run your AC power through your RVs built-in 12v converter, to charge your 12v house battery, but I think this would be the least efficient method of power conversion of all - going from 48VDC to 120AC and back to 12V DC. I wonder how much power you would lose? Maybe 25-30%?
Chip
