In California you have relatively good weather and predictable weather for generating solar power. It will never amount to more than a couple percent of demand simply because there is not much energy captured that way (about 25% of the sum's energy at best). Contrast that with well-placed windows that can capture 90% of the sun's energy and turn it into interior heat.
OTOH, you can also benefit in SoCal from using solar for A/C. In the desert SW that is probably the most cost effective use of solar. That doesn't work very well here in the east.
Thanks for the comments Palmer. I appreciate the perspective on these matters.