When you start talking inverters and such, you are getting into money that might not need to be spent. Guy down the road was not connected to the grid for several years. He had two smaller solar panels on the roof and a couple of small windturbines. In the basement of his place he had a bank of marine deep cycle batteries.. He used 12 volt led bulbs through out the house and had a 12 volt coffee pot, 12 volt electric sauce pan, 12 volt color tv set and a 12 volt refrigerator. Propane stove and water heater. The panels and turbines would generate enough for the three day weekends that he came to stay. If he was staying longer, he had a long heavy 12 volt cord that he plugged into his work truck. He let the truck run for about 15 minutes and that would charge his batteries enough for another day. Of course if it was real windy, the 2 - 450 watt turbines could keep the place powered. Gus grew up on an island in the Mediteranean where folks didn't have grid power. He wanted nothing to do with an inverter to run things, he said it "lost" too much power in the conversion.