Heating (electric) V90 T8 Recharge MY23 – Consumption KWh

Hello, sometimes a question / observation to other V90 T8 Recharge drivers who have an electric heater. I like to preheat my car at the wallbox in the morning at very cold temperatures (at the moment so -5 degrees). Now I have already observed the following several times and can measure the values also on the basis of my smarthome or photovoltaic system: The car is charged the previous day 100% by Wallbox. As starting time of the planned departure I enter e.g. 6.30 clock in the morning. The car then draws approx. from 4.45 o’clock electricity until 5.45 o’clock (3.7 KWh) one hour long. Then it pulls from 5.45 o’clock continuously less current from the wallbox until the scheduled departure time. First 3000w, then 2000w… in total per warm-up process so about 5.5 KWh and takes 1 hour and 45 minutes for the whole process. I “buy” myself with the preheating of course a little more electric range and a pleasant temperature in the car, but it “costs” me 2.20 € (5.5 KWh * 0.4) the net heating capacity in the other 3 km.