> You're missing the obvious alternative, which is that Cali could instead tax new homes the amount required to install the equivalent panels in some field, where they're cheaper and easier to service, where they can be positioned for optimal sunlight, etc.
No thanks. Then some other org controls the power I can get from those panels, can corrupt officials to raise my rates unnecessarily, charge me higher rates for generation facilities that may not be needed except to juice shareholder returns (Duke Energy collected over a billion dollars for a nuclear power plant they'll never build in Florida, and they are under no obligation to return those funds to ratepayers). This is not uncommon. NV Energy in Nevada, Duke and FPL in Florida, utility coalitions in Kentucky and Arizona have all fought against distributed generation, the list goes on.
Rooftop/distributed solar is a hedge against utility shenanigans, and with how quickly rooftop solar pays itself back (under 10 years in over half the US states while rolling the cost into a long term fixed rate loan product, ie your mortgage), it's insane we don't mandate its installation in more places on new/retrofit construction [1].
Disclosure: I own a 10kw solar install on my roof. I’m biased and opinionated.
[1] https://i.imgur.com/ug2R3Jl.jpg (NREL US Solar Potential Map)
[+] https://i.imgur.com/c86gWxh.jpg (Rate of return on cash invested by state)