Tesla Model S: Heating Elements & HVAC Power Consumption (Actual Numbers!)


Tesla Model S: Heating Elements & HVAC Power Consumption (Actual Numbers!)
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While, in nearly every way, EV’s are more efficient then Internal Combustion Engine vehicles, One advantage (all be it, really just the only one) that ICE vehicle have, is extreme excess amounts of heat.
For EV’s, they must “Go out of their way” to create heat when those Temps start to drop.

So, in general, EV’s have 3 main ways (Technically 4, however, the heat generated by the drive train and energy usage is usually not quite enough to warm the cabin, so I do not count that).

Ways to heat: Heat Pump, Resistance Heater (Think Space Heater) or Warming coils (also resistance) for use such as Seat Heaters.

In the case of the Tesla Model S (And Model X), it uses Resistance Heating (Space Heater) to heat the cabin. It also has Heated Seats, Defrosters, Heated Wipers, Mirrors and Rear Defroster.

Now, the question…. How much power do these use. What impact on range. Which is ideal. So here we go, the approximate power consumption numbers for each.

Baseline (Vehicle at Rest but Powered up): 247Wh
Defroster (Rear Window & Side Mirrors CWP): 285Wh
Steering Wheel Heater: 95Wh
Heated Wipers & Nozzles: 95Wh

  1. Seat Heater: 57Wh
  2. Seat Heaters: 133Wh
  3. Seat Heaters: 171Wh
  4. Seat Heaters: 209Wh
  5. Seat Heaters: 247Wh