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How many watts does A/C use? here's your answer

Discussion in 'Model S: Battery & Charging' started by L-P-G, Jul 14, 2016.

  1. L-P-G

    L-P-G Member

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    I let my S charge to its selected percentage and then opened my energy monitor to verify there wasn't any more power being pulled from the grid

    upload_2016-7-14_11-36-12.png

    upload_2016-7-14_11-38-3.png

    The Tesla breakers are pulling about 0.016Ax2 (2 breakers) = 0.032A or 32mAh which seems to be the wall connector and its LEDs


    At this point in FL inside of my garage it is 94F, I turned on auto condition to Lo which sets the A/C to max
    upload_2016-7-14_11-41-21.png

    Right off the bat the car starts to use 2.4kW.

    Once the temperature inside the car reaches the temp I set it to (which happens to be 60F) the power use drastically goes down to 661w.

    upload_2016-7-14_11-45-30.png

    When winter comes around to FL i'll update this power consumption for the heat, keep in mind it won't get cold enough for the battery heater to come on.
     
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  2. AMPd

    AMPd Active Member

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    Very informative, thank you!
     
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  3. Muzzman1

    Muzzman1 Member

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    IMG_4631.jpg I've seen my Model S get all the way to 4kw at "LO" and my Model X get to 6.2kw on "LO".
    If I remember correct, the heater will do even more damage at about 8kw on "HI"
     
  4. FlatSix911

    FlatSix911 918 Hybrid

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    Correct, I always use the seat heater rather than cabin heating ... much more efficient :cool:
     
  5. gerti

    gerti Member

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    Feel free to visit us in Minnesota, say around the end of January. ;-)
     
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  6. SDRick

    SDRick Member

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    #6 SDRick, Jul 15, 2016
    Last edited: Jul 15, 2016
    So once to temp, the AC uses the equivalent of about 2 miles of driving per hour?
     
  7. kort677

    kort677 Active Member

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    I agree, I spent 6 weeks in CO this winter and rarely used the heater, the seater heaters kept me comfortable.
     
  8. David_Cary

    David_Cary Member

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    Remember your a/c will use what it needs. This Florida garage while not moving it needs 600W to maintain 60 degrees. That has very little to do with driving in the sun. Obviously solar gain is a big one but even heat from the batteries/drivetrain, heat from the warm bodies in the cabin, and air leakage from the outside as the car moves along at 60 mph.

    So interesting info, but don't extrapolate to the real world.

    Now do the same thing with 3 people in the car and sitting in noon sun. That helps with 2 of the 4 variables.
     
  9. L-P-G

    L-P-G Member

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    That can be done, give me a few days. Also the whole while the car moves you need less power is only because while the car is moving air is flowing through the condenser so the condenser fan doesn't have to run. Back when I was a mechanic we used to spray water on the condenser to simulate driving speeds, a typical condenser fan motor has a 40A relay so at the worst without taking apart the frunk to figure out the amperage draw of the fan you could add 40A to these number and get a rough estimate for driving.
     
  10. AWDtsla

    AWDtsla Active Member

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    Power draw is dependent on the inside/outside temperatures and settings. I've seen it get up to nearly 4kW at max.
     
  11. L-P-G

    L-P-G Member

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    That's correct which is why I did a worst case scenario in FL on July inside a garage. Did you see 4kW on the charging screen like Muzzman1 did? because that number is rounded up so it's not exact either.
     
  12. AWDtsla

    AWDtsla Active Member

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    Remote S, battery current draw times estimate battery voltage. It's not rounded.
     
  13. L-P-G

    L-P-G Member

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    Ok so you're getting it directly off the API, then that number is correct. I don't own anything IOS so I wasn't aware of that.
     

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