In Scandinavia, very many (probably a clear majority) of cars are equipped with 230 V heaters. There's a connector in the front of the car, you plug the car into an electric socket which has a timer. It goes on in the morning an hour before you plan to leave, and heats up the engine block (heating resistor in the coolant) and optionally there's a Schuko socket in the front passenger's feet and you can plug a heater with a fan there, so that the inside of the car is warm and dry. Both the engine and the cabin heaters range from 600 to 1200 watts.