[Fulltiming]

That is the equivalent of using 572 watts continually, 24 hours per day, for 30 days. The AC's should be pulling about 14 amps each and if the coach is hot, they could be running the entire hour. If you are running 2 AC's for 3 hours a month each, that is 10,080 watts or 10 Kwh so that isn't contributing that much. Is your electric water heater running while you are gone? That has the potential of using more electricity than the AC's over the period of a month. The battery charger will consume some electricity but unless you have the old battery boiler, it shouldn't be cycling on very often nor staying on that long each time to replace the battery drain from parasitic loads in the coach. If you have a bad battery that could cause the usage to increase. Your refrigerator could be using some electricity if it is left on. Is you ice maker turned on? I found that those drink electricity like it is going out of style. I had to turn mine off to keep the batteries from discharging badly overnight when dry camping.

Any neighbors that might be tying into your meter from time to time?