Works fine in Europe where we have percentages like that already. The mistake people make is assuming that cars are charging all the time when they are at home.

Works fine in Europe where we have percentages like that already. The mistake people make is assuming that cars are charging all the time when they are at home. The reality is that average day to day behavior cause that to be more like once a week for many drivers and that drivers can pick the moment when they charge. On any given day you might only use a few kwh. Mostly the collective charging behavior spreads out a little.