http://www.kqed.org/.stream/anon/radio/quest/2011/01/2011-01-31-quest.mp3
Solar power is booming in California. Last year, state officials approved an unprecedented amount of new solar energy. But large solar farms and small home rooftop installations have run into challenges. As Lauren Sommer reports, that's why a new sector of solar is emerging -- one that benefits from being in the middle.