@seawulf575 In the first place, the goal of most new car sales in California being zero-emission vehicles (ZEVs) by 2035, would not all be EVs (it includes fuel cell and plug-in hybrids with all-electric range of at least 50 miles), and would not mean all the cars in California would be ZEVs – just the new sales would be. ICEs would continue to be used in CA, just like there are many vintage cars still being driven – even Model T’s from over 100 years ago. So even in 2135, I don’t expect 100% of all cars in California will be ZEVs.
In the second place, California’s power planners are not as mindless as you seem to think, and they are of course planning for the demands to change (about 25% expected increase by 2035), and are also planning changes in how the power is supplied, as well as expanding their capacity to supply power at peak. That includes not just generating more power, but shifting the types of production to more sustainable ones, and also increasing the battery capacity of the grid, so that the peak capacity can be increased without needing to increase the maximum production by as much.
Not finding a direct answer to the way you worded your specific question: Back of the napkin math is something like there are about 36 million cars in CA ATM, and something like 850,000 sold last year, including about 215,000 EVs, so if that were a steady increase toward 100% in the period from now till 2035, that’d be about . . . 4 to 5 million new EVs. There are currently about half a million EVs in California, so that looks like about ten times that total by 2035, so an increase of 0.4% of the peak load now, to 4% of the current peak load, but the peak load is expected to be 25% more in 2035, so more like 3% of what the peak load is expected to be.
Another way of looking at it is, 3% increase due to EVs, and 22% expected increase due to other things.
So still not huge, and also, the load increase is expected and being planned for.
(There are some people with home solar panels managing to charge their EVs entirely with their own solar panels. As well as people with home solar panels who sell their power to the grid, and who help increase the grid’s peak capacity.)