@FSH 210 Sport
I'm not doubting your expertise in the field, but I think your estimates are off, and I have some questions.
Why do we have to permit home chargers? They run on what amounts to a dryer circuit. Wouldn't the power grid have been permitted for the complete service level of the house (200A or 100A services, etc.?). We're not talking huge kW's of power here. Most are around 11kW or less for home charging. The impact to the grid take-up should be relatively minor, right?
I think this same issue moved along to your calculations for 1/3 of all electric cars plugging in at the same time. Again, they're not all drawing 250kW DC fast charging level power. They're more than likely each drawing closer to 11kW. Quick google show's 31.4mil cars. Lets call 1/2 of that 15mil just for easy math. If all of those cars plugged in at the same time at home, that's a gain of 550MW, NOT 59,000MW. 3 orders of magnitude less than you're estimating. What numbers are you using to estimate demand?
Reading further in about circuit protection, KVA backloading, and other de-rates required for proper operation......I'm curious if the estimates above skewed that significantly. I know it will still need to exist, but I suspect with 3orders of magnitude less draw than expected, it adds much smaller overhead concerns than previously thought.
The NIMBY issue is real. We're Americans it's kind of what we do, despite it clearly being less than stellar for progress. Not sure how to handle that portion of it.
Regardless of the answers, it's interesting discussion. While I don't think it's going to be a walk in the park, and just magically appear, I also don't hold the thought that it's an unsurmountable task. Resources, Time, Effort will all be involved to make the transition. Beyond that, it's likely to cost us money, not make us money; so the driving force will be legislation, not capitalism. With all that said, it's still the right thing to do!