yes - if you are being pedantic on the distinction between energy and powerNo, I think it's right. I'm reading the % battery numbers off the screen so if it uses 5% battery in 20 minutes to heat the car and the battery is 64kWHrs then that's 3.2kWHrs used in 20 minutes so its 9.6kW/h. And if it's really freezing outside and I put the defroster on as well it uses 11% battery which is 7.04kWHrs in 20 minutes which is 21.12kW/h. No?