Ok well all I know is that over here, in The Netherlands, it’s the companies that maintain the actual grids that are saying this. Our grids are already fairly heavily loaded, and it needs upgrades to accommodate the increase in demand. Both from EVs as with other projects to migrate away from fossil fuels.

See for example a study from our government about this exact subject (in Dutch): https://www.kimnet.nl/binaries/kimnet/documenten/rapporten/2...

The summary is that if there were 4 million vehicles charging overnight, it would cause a total of 20GW of electricity. Our current total consumption (including industry) is 33GW, so this would cause a significant increase in electricity consumption.