The few times I've used it for dry camping, I get better results with my Honda 2000 powering a standard automotive "automatic" battery charger. I think the batteries charge at a little higher rate, you don't have to "fix" the open fault design, the Honda auto throttle adjusts with the needs of the charger, the Honda won't trip from an accidental "hairdryer overload" and the full 120 capacity of the inverter's capacity is available.