Robert, That is all going to change in 2015. We have solar city on our house. I was gripping about the use of Chinese panels, and several of the engineers indicated that Solar City has been waiting for Solar to get cheap enough so that they can bring it in-house along with a large amount of automation.
BTW, when we buy our tesla (waiting to see the model X, and will then decide which), it will be integrated with the solar system so that if we lose electricity, then during the daytime, we will have 2-3 circuits on it, as well as charging the Tesla, and then at nighttime, it will borrow from the car. Pretty cool.
You will also like that SOlar City is going to expand beyond solar. They are going into energy, including geo-thermal.
In fact, I talked to one of their engineers about how to modify fracking to make it useful for geo-thermal. Basically, the standard approach is vertical down to the same levels within the reservoir, turn horizontal, frack and then pump it in. BUT, if you do not do a LARGE frack, and add one more line that goes down deeper (below the reservoir), frack that one hard, and then use that to force the oil/gas into the upper piping, you can use this once the well is dry, for geo-thermal. And the nice approach is that the collectors are not fracked hard, so it will not force other elements into the aquifers.
Regardless, one thing about Musk, that man is damn exciting.