[RKDinOKC]

I always thought home hydro-electric power would be the ultimate way to go. Use solar, wind, etc. to pump water into an elevated storage tank. Then have a generator run off the head pressure of the elevated tank to make power as water is drained to a lower storage tank. Size the tanks for the longest period without solar/wind. Probably take some pretty big storage.

If the elevated tank is exposed to sunlight (passive solar) and the lower tank buried (geothermal), the circulation could also be used to supplement heating and cooling of the living space.