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There are a few major problems with solar imo.
1. the cost of storage and up keep is very expensive.
2. Solar is not a dependable why of producing power, wind also has this problem.
3. Many jurisdiction require that homes are tied with the utility grid.
4. The buy back amount is much less than the utility company sells power for.
5. The infrastructure is not capable of handling large amount of excess power being put back into the system. Many utility companies require that they have control of your solar system so the they can control how much you can feed back into the system.
I have a 10KW solar system which paid itself off within a few years. My power "bill" gets credited to my account quarterly. That's despite the tariffs expiring a couple of years ago. My upkeep involves cleaning the panels once a year.
Obviously the economics depend on how much sunshine you get and the local price of electricity, but sunshine's not an issue for most of Australia and our electricity prices are extremely high. I would have thought CA was similar.
In fact locally (South Australia) our power grid went to crap after they privatised and none of the companies which bought in are willing to invest in infrastructure. The take up of solar here is massive. I think every house on my block has at least a few KW of panels.