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Heated steering wheel and seat vs central heating

trils0n

2013 P85
Feb 12, 2013
1,529
1,982
Earth
Seat heaters use almost no energy. The main heater uses lots and lots of energy. I'd say around 6-8kW at full blast. Similar to what it takes to drive a steady 25mph on flat ground, no climate control. Seat heaters don't seem to even move the power meter.
 
Seat heaters use almost no energy. The main heater uses lots and lots of energy. I'd say around 6-8kW at full blast. Similar to what it takes to drive a steady 25mph on flat ground, no climate control. Seat heaters don't seem to even move the power meter.

So the electrics on board move the power meter up? I thought the Model S shows the consumption of power as "0kw" if the car is not moving, even if you have the heater and music w/subwoofer on full blast?
 

trils0n

2013 P85
Feb 12, 2013
1,529
1,982
Earth
So the electrics on board move the power meter up? I thought the Model S shows the consumption of power as "0kw" if the car is not moving, even if you have the heater and music w/subwoofer on full blast?

Yes, everything (as far as I know), including heating and air show up on the power meter, even if the car isn't moving. The car has to be on (press the brake to turn car on) to see the consumption. If I'm in park I can even see the power meter move just turning on the lights. Can run the HVAC or other loads while the car is "off" and you wont see consumption.
 
What I really want is a heated steering wheel retrofit. The seat heaters are great and let me keep the car cooler, but my fingers get numb from the cold. That would be much more efficient than dialing up the heat from the HVAC.

I'm obviously not too fussed about heated steering wheel and heated seats but I'm more thinking along the lines of range extension.
 

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