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How does the heater work?

Discussion in 'Model 3: Battery & Charging' started by seyclone, Jul 19, 2018.

  1. seyclone

    seyclone Member

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    Does the Model 3 use a resistance heater or a heat pump to heat the car in the winter?
     
  2. Brian's ReX

    Brian's ReX Member

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    I believe (although others probably have much more intimate knowledge than I on this subject) that it is a resistance heater - which I have been told is why it is the single largest draw on the electrical system other than the motors.
     
  3. brkaus

    brkaus Active Member

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    Resistance heater.
     
  4. seyclone

    seyclone Member

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    Too bad. A heat pump is much more energy efficient and they could have used the AC compressor.
     
    • Disagree x 1
  5. brkaus

    brkaus Active Member

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    There is a many page thread in the model s forum here on the topic.

    I agree it would have been a good choice.

    There are some reasons this choice makes sense too. I won’t try to remember or rehash them here.
     
  6. Big Earl

    Big Earl Supporting Member

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    Reasons include, but are certainly not limited to, increased cost, complexity and marginal energy savings in very cold climates.
     
  7. jamnmon66

    jamnmon66 Member

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    But they don't work very well when it gets really cold & the efficiency goes down as the temperature does. At least that's true of my heat pump/AC in my house. I'm guessing a resistance heater is the most reliable option in all scenarios.
     
  8. MP3Mike

    MP3Mike Well-Known Member

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    The problem is that while you may need cabin heat it is possible that you need to cool the battery and/or motor/charger/inverter at the same time.
     
    • Like x 1
  9. seyclone

    seyclone Member

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    Thanks, all. I suspected that there would be a lot of posts on the subject. I guess I was using the wrong search criteria.
     
  10. brkaus

    brkaus Active Member

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    • Informative x 1

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