I live in the San Francisco Bay Area. In 2018 I had my property assessed for solar power options. According to the reports, using just the roof of my house with static (non moving/sun tracking) solar panels, my humble house (less than 1500 sq. ft.) could offset 100% of the energy needs of my family AND two other similar households, DURING THE WINTER! I wanted to build several additional structures, like carports and patios, using solar panels. I calculate at least 5 similar households, besides my own, could be offset on my tiny suburban lot.
There were a couple of options available to me at the time.
The state was willing to pay for the installation of solar panels on my roof to offset my energy usage, as long as I bought energy from a third party provider during the offpeak hours. However, ( I wont bore you with details) PG&E was still my service provider (they did the billing [wink,wink]) and would only allow me to offset 90% of my usage in terms of size of solar array.
I could design and purchase (meaning get a loan to pay for it, most likely a mortgage attachment) any size solar array I wanted. The pricing is astronomical. Basically, I would be paying for this system for the rest of my life before I saw any real returns on investment, at which point, it would need to be replaced.
What I learned was PG&E has a say in every aspect of the generation/transmission of power, even and especially if you own your own generation options. There are regulations/rules/laws to stiffle true deployment of renewable energy in California as of 2020, to provide benefit (profit) to PG&E.
My comment at Mother Jones.