I had some friends who wanted to live off the grid in California, but couldn't. They said it's actually illegal here. That was 7 or 8 years ago. They moved to New Mexico instead, and built an earth home underground - completely free of the grid. When I saw them later, they said it's save them a lot of money and their house temperature stays steadier too. Believe it or not, in the wee hours of the morning in the dead of winter he would have to open windows, because the earth itself was too hot to sleep.