Quote:
<< The reality is that in the United States today, EVs already deliver about 60–68 percent fewer emissions than gas- and diesel-powered vehicles. And when those EVs are charged smartly they can further reduce emissions by an additional 18 percent and even become a grid resource. >>
By smartly, they mean charging when the grid has excess renewables electricity, that would otherwise have to be curtailed, in other words wasted.
https://cleantechnica.com/2022/03/11/yes-more-evs-fewer-emissions/