In my case I want to build a place with wind and solar. It will feed a 10-20kW battery array and the home will float on that. Screw the incumbent power providers.,(reply>), Also, you don't need particularly sunny days, to generate SOME power, especially if your solar panels are powerful enough. As long as the sun doesn't forget to rise, you should have enough for a house. It's when you have to feed a city that it becomes harder.,(reply>), 20kW would last 2 to 3 days, After that a natural gas fired generator.,(reply>), what happens on a cloudy, wind-lacking day?