An electric car in the Netherlands uses around 300 Watt on average over a year. That's not a lot. The grid challenges arise because people like to charge them fast. 11 kW in a residential street is a lot. And so is 150-400 kW at a fast charging station.
@Sustainable2050 Source, please?
@franciswashere Own estimates. 300 W = 2,600 kWh in 8,760 hours. The charger capacities are typical values here.