How can the US power grid struggle with ACs in the summer, but be (allegedly) capable of charging millions of EVs once we all make the switch?

Question

Currently we are told the power grid struggles to handle the power load demand during the summer due to air conditioners. Yet scientists claim this same power grid could handle an entire nation of EVs. How? What am I missing?

In: 20541

Answer 1

You can carry 20 boxes over a period of an hour, but you can’t carry 20 boxes all at once.

AC is blasting pretty much all at the same time whereas car charging is a bit more spread out.