You can lease a solar system from a company like Solar City (their office is in Sacramento). For about $80 a month you can become part of a massive distributed power grid that will:
(a) save the planet
(b) prevent Enrons from reforming
Righteous, no? Every day you can log on to a web site like the one in the picture. It gives you an accurate summary of what you generate each day, and how much carbon you offset.
Sorry about the lack of numbers in the graph—they didn't translate when I converted the file. But basically, it being a rather cold day late in the year, solar production peaked at about 1.2 kilowatt hours today. Can't wait to see what it gets up to in July...