Sola panels are a good way and tying them into the grid system is a way to go. That way excess power your system produces goes into the grid then you can get it back when needed at night or at periods of heavy use. The electric utility company will also pay you for the power you put into the grid system. Check out this web site there are a few articles on this subject.You can also buy some books through the site. If you are up to the DYI you can save quite a bit of money. Amazon.com is a good place to start for pricing equipment.