I had never bothered to calculate the miles-per-year before. My very, very modest rooftop solar does in fact throw off 11,000 actual, real world miles per year for my actual PHEV - so very close to your number. That is a fun way to think about things. Alas, much of it actually goes to waste as the car that would be charged is at the office with me.
My opinion is states like California should enact policies to encourage work place charging. Because that's when the energy mix has the highest amount of solar.