For the amount of KWH used, you could power 50 new Samsung refrigerators. I'm guessing you have a few appliances that are energy hogs. Anything with a compressor and motor is going to use a fair bit of power. If your converter is putting out 50 amps, battling a bad battery, that will be a pig, too. Any heating coils are inefficient use of power, like heaters, toasters, hair dryers, etc. 1500 KWH/mo. is a fairly big use. We have three living in the S&B and we don't use about a half of that. The trailer is puttering along on solar and it isn't even Spring Cleanup in MN, yet.