I've looked into the this. problem is that solar is less cost efficient that electricity coming through your socket, most of the time.
Now, power generated by a water turbine, if you have access to moving water, is another story altogether.
there are a handful of different types of alternative energy, although I still haven't found anything that is more cost effective than power coming in through the sockets already.
could be wrong and if anyone has any bright ideas, I'm all ears.