Let...the Sun Shine...Let...the Sun Shine In

Just a question of curiosity:

I can understand San Francisco not blanketing the city with solar power, since fog is so prevalent there.

But here in San Diego County there are few trees and constant, belligerent sun.  Utility bills are through the roof.  We're constantly getting FlexAlerts and still milking hydro-electric...in a DESERT.

Why not cover these buildings with solar panels?  Where's the solar industry down here?

I would accept hiking under that great burning ball of fire every day if we were using it.