TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

Impact of air conditioning on driving range?

Discussion in 'Technical' started by Tipjar, Oct 15, 2015.

  1. Tipjar

    Tipjar New Member

    Joined:
    Oct 15, 2015
    Messages:
    4
    Location:
    San Diego, California
    I'm in inland San Diego county so air conditioning is a must for me. I'm wondering how much air conditioning draws from the battery and affects driving range. I guess the heater would also draw a lot of energy, so same question for heater as well. And which you think draws more. Thanks in advance.
     
  2. CHG-ON

    CHG-ON Still in love after all these miles

    Joined:
    Jun 24, 2014
    Messages:
    2,744
    Location:
    Santa Cruz Mountains, USA
    Other threads have said that the heater draws much more than the AC. Along with heating the cabin, it needs to heat the battery if it is really cold. I haven't done a measurement, but the AC does seem to use more energy, just from casual observation. I have read that it does also. Makes sense. 7.0 is supposed to make AC more efficient. No mention about heating.
     
  3. Tipjar

    Tipjar New Member

    Joined:
    Oct 15, 2015
    Messages:
    4
    Location:
    San Diego, California
    Not too worried about warming the batteries as it only gets down to freezing about five nights a year here, and that's during wee hours I'm not driving around. A typical cold snap is in the fifties.
     
  4. Caligula

    Caligula Member

    Joined:
    Oct 14, 2015
    Messages:
    600
    Location:
    San Diego
    You have my condolences, given the recent weather conditions. :biggrin:
     
  5. Pete90D

    Pete90D Fan of Red Lights

    Joined:
    Jul 25, 2015
    Messages:
    476
    Location:
    Bay Area, CA
    Have Photosync installed and it will make a big difference in both comfort while driving and the energy usage of the A/C

    I have 3M on my Mercedes and while Photosync has performed better, when I drive to San Diego it has made a huge huge difference in the trip. When I had it installed I was able to change the A/C setting up by 4 degrees and be comfortable and it the fan level was never as high as it was before.

    Just having a side window partially down when the sun is hitting it I feel such a massive difference in different parts of my face.
     
  6. MrJones390

    MrJones390 Space Boat

    Joined:
    Jun 26, 2015
    Messages:
    251
    Location:
    Los Angeles
    Roughly 2-3 miles are lost for every 220 when running A/C in my P85.
     
  7. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

    Joined:
    Mar 8, 2012
    Messages:
    12,743
    Location:
    Texas
    A/C doesn't use enough energy to worry about because Tesla uses a variable speed scroll compressor that seldom runs at full speed.
     
  8. mmccord

    mmccord Member

    Joined:
    Dec 9, 2014
    Messages:
    761
    Location:
    Pine Bush, NY
    I have found A/C energy usage to be minimal, even without tint on humid 100 degree days. Driving with the windows open has a much larger impact. I like to drive with the windows open, but if I'm stretching my miles for the day, I'll close them and run the A/C instead.
     
  9. swaltner

    swaltner Member

    Joined:
    Oct 13, 2012
    Messages:
    495
    Location:
    Kansas, USA
    I don't think Tesla splits out power consumption, but on the Nissan Leaf, they do. Power draw for air-con will start out at about 3.5 kW and then drop to something like 300-500 W once the cabin temp stabilizes. If you're taking a bunch of short trips around town, the HVAC never gets a chance to get to its low-power mode, so you could take a decent hit on range. If you're on a long trip and the cabin temp gets stabilized, you may add something like 5-10 Wh/mile to your consumption at highway speeds. In other words, as others have said, it's nothing to be real concerned about
     
  10. Iz

    Iz EVs are here to stay

    Joined:
    Nov 22, 2006
    Messages:
    1,074
    Location:
    New York
    On a 32-mile trip in my S60 with A/C at a moderate setting, an additional 3-4 miles are consumed from the rated range. It is not an energy hog. However, the heating system is another story. This past winter on a typical round trip from home to work (65 miles), there was nearly a 40-mile loss in range. Cabin temperature was set to 65 and fan speed to 3. The heater power consumption can be quite high. After almost 3-years of ownership, it is one of my main pet peeves (along with the short sun visor).
     

Share This Page