Earlier quoted context omitted.
California has energy costs more than double most other states so it’s probably not the best argument for “it’s so easy to go mostly renewable.” A lot of things are feasible if you’re willing to [force everyone in the state to] spend 2x. Whatever California is trying to do in the past 20 years has been extraordinarily regressive.
Our energy costs are due to the distribution network and the massive amount of deferred maintenance on it that has come due in the last decade, accelerated by the Camp fire court case. There was a two year period a few years ago where power went out at least once a week while SDGE replaced every power pole in the rural east county by flying them in on helicopters. That's largely what we're paying for.
Generation costs are a small part of most consumers' bills, but particularly in CA.
If you look at the location marginal pricing map from CA ISO: https://www.caiso.com/todays-outlook/prices
You'll see that right now (before solar has really kicked in), The price for the next megawatt hour of generation is $49 -- i.e., under 5c per kWh. That's comparable to the average price in PJM (east coast) at the same time:
https://www.caiso.com/todays-outlook/prices
The big problem for California is that cheap generation via solar doesn't move the needle as much on consumer bills because of the transmission and distribution costs. In San Francisco, for example the distribution fee is over $0.20/kWh. That's twice what mine is in Pittsburgh. In contrast, the generation pricing is only about $0.04/kWh more than mine:
https://www.pge.com/tariffs/assets/pdf/tariffbook/ELEC_SCHED...
though this pricing does favor behind the meter generation such as residential solar.