Well, I hope power generation at your location isn't coal-fired.

Ars technica even has an article about sudden EV-charging power demand may force electricity company to fire up coal-plants for the load, which causes even more pollution. If they have a set schedule and not cause a shock load, then the power company can stick with more of the renewables.

It isn't the silver bullet that everyone claims it to be - don't look too hard at the manufacturing either.