[jbdoug]

Yeah it seems like, in Boston at least, grid carbon intensity peaks between 12 and 8pm and is at its lowest around 4am. It's probably on a case by case basis though -- if you live in an area that still burns a lot of coal, your base load is likely to be pretty dirty (though of course in that case it probably doesn't matter when you charge your car, unless there happens to be a lot of solar as well).

[elif]

My state (ga) has 25% nuclear and a peak load of 70 units compared to 30 overnight.

So napkin math says half of my car energy is nuclear.

[jbdoug]

Yeah that's pretty solid!