In California, a homeowner installing a solar system on their home will increase its value by an average of $17,000, according to an “Open Web Site” study by Lawrence Berkeley National Laboratory. The analysis of 72,000 home sales from 1999 to 2009 showed that the almost 2,000 homes with roof-top solar systems attracted higher bids from buyers who wanted to save money on utility bills and reduce emissions of greenhouse gases.

