It exists in Germany and it drives electricity price to the top. Current price for private households is around 0.4 Euro per kilowatt hour (0.5 US Dollars). Large part of it are taxes.

Household electricity prices in 2020: https://www.statista.com/statistics/263492/electricity-price...

Taxing electricity will hit households first (electric heating + AC) before it makes a significant dent on EV costs.