EV's as a rule don't charge after work. Most (all?) EV's allow you to charge when the electricity is cheapest -- at night.
An average daily charge for an EV is < 10 kWh since the average daily usage of a car is < 40 miles. That's less than what a whole house A/C will use on a hot day.
So any grid that can handle A/C charging on a hot day can handle EV charging at night. Not all grids can, but that means that they'll need to be upgraded whether or not we add EV's to the grid.
An average daily charge for an EV is < 10 kWh since the average daily usage of a car is < 40 miles. That's less than what a whole house A/C will use on a hot day.
So any grid that can handle A/C charging on a hot day can handle EV charging at night. Not all grids can, but that means that they'll need to be upgraded whether or not we add EV's to the grid.