https://www.inverse.com/article/5148...infrastructure
There are some regional differences, but our electrical grid today could not handle a bunch of EVs. Not everyone charges at night, and peak demand is different in different regions. They would have more of an impact on temperate regions. Plus around 16% of the workforce work in the evenings or at night.
Though I suppose they can provide more stability to the grid by charging at night; something I did not think about.