we put in a few solar panals on one of our buildings this summer..Our electric bill is half of what it was. WOO HOO
All of our buildings have a south facing roof. Could easily create a solar farm.
The system is sized for 115% of our current power consumption, so we should run a credit on the electric bill, and we will have power in both of our outbuildings that are not currently lighted. They have also run power out to the island in my pond so that I can hook up a pump/fountain in the summer.