The other problem of solar is the reduced rates, rebates ect ect are going to much less in the near future. There are already complaints that those with solar power are not putting enough back in to pay for the infrastructure of the power grids, therefore putting the burden on less wealthy customers.
It also has already started to get somewhat political on this issue: a group, I forget which one, stated that the current solar power way of doing things benefits the more affluent members of society. Wealthy, and mainly white home owners, can afford to buy the cost saving solar while the poorer minority communities cannot and therefore shifting the cost of the infrastructure to the less fortunate.
And some political groups and politicians are starting to take notice.
But even with out the political angle it has been proven that those that have solar underpay for upkeep of infrastructure and power companies and regulators have taken notice. Nevada already cut the benefits for solar in half and they did this retroactively. So people who bought solar a few years before and thought they would pay everything of in 15 years were shocked when they got notice that it would now take 30.
Now hopefully there can be a solution to this here in CA, but when money is involved and then perhaps politicians, I would not hold my breath.