I charge my EV after 10pm, when demand is so low that I can buy it for 1 cent a kilowatt hour. So first we need enough EVs charging overnight to reach the late

I charge my EV after 10pm, when demand is so low that I can buy it for 1 cent a kilowatt hour. So first we need enough EVs charging overnight to reach the late afternoon peak before we worry a lot about grid capacity. I also generally charge my EV in 1 or 2 hours, it does not typically take all night. So if grid capacity becomes a problem, a bit of smart scheduling to spread the load should be pretty straightforward. And after that, we just add more capacity to the grid. The electric company exists to sell us electricity, and if we demand more, they will make more. The kind of growth we'd need to see in the grid to support 100% of all new cars being EVs is entirely within the abilities the electric producers have demonstrated in times past.