That’s nonsense and mostly a big oil talking point. In the south every single home has at least one large A/C unit, most of which draw the amount or more as an electric car being charged and yet the grid doesn’t fall over when it’s noon and everyone’s air conditioning is running full blast during the summer. This is like that old fable about the English power companies having to fire up peaker plants during the commercial breaks of soccer games because of so many people putting the kettle on.

Further, most electric car owners I know charge at night when the grid usually has excess capacity. I personally am on a time of use plan where I get free charging from midnight to 3AM, and that’s the window in which I charge my electric cars every day.