Yeah, the problem with ground based solar is that it's
1. Land Intensive
2. Effected greatly by weather
But for small scale conservation efforts, it probably definitely helps. If I had my own house I'd probably be messing around with solar and wind power right now, and maybe even tidal power if I had enough land.
Though, I wonder if there would be any way to tap into the energy generated by convection in a standing pool of water. I wonder if that would be more efficient than solar... Of course you wouldn't be able to use the pool of water for much of anything else, but still...