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More range after 6.2 update?

Discussion in 'Model S: Driving Dynamics' started by mhpr262, Mar 31, 2015.

  1. mhpr262

    mhpr262 Member

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    Some people have reported noticeably better wh/miles numbers after installing the latest 6.2 update - can anyone confirm?
     
  2. TurboFroggy

    TurboFroggy Member

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    Highly doubtful. The increased range or any perceived increased range would more than likely be due to increased outside temperatures. Welcome to springtime.
     
  3. sandpiper

    sandpiper Active Member

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    As the temperature is semi-reliably above freezing, I'm starting to see a big improvement in my wh/km readings! Very exciting.
     
  4. mknox

    mknox Well-Known Member

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    Yep. Coming up on my third spring season and it just amazes me how much the efficiency improves with temperature.
     
  5. sandpiper

    sandpiper Active Member

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    I'm curious as to why it makes such a difference? According to the drag equation the air drag is proportional to the density. And density is inversely proportional to the Kelvin temperature. So at -20, the air is only 16% denser than at +20. Yet the energy consumption goes up far more than 16%, even with the HVAC off.

    I wonder if there are some opportunity for improvement there.
     
  6. brianman

    brianman Burrito Founder

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    Pack temperature management (warming) during winter consumes a lot.
     
  7. lphe

    lphe Member

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    If you go to Tesla's web site and use their range estimator, without climate at 55 mph, you see a range of 352 miles at 70 F. At 0 F, the range is 330. This is only a 6% reduction. That doesn't seem right. As you noted, increased air density should result in a greater reduction than 6%.

    For my PHEV, without using climate, energy consumption, in EV mode increases 40% at 0 F. There is no battery heater for this car.
     
  8. dirkhh

    dirkhh Middle-aged Member

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    Many people who's rated range at 90% had dropped over time experience a brief increase of the rated range shown after a firmware update. This has been reported several times.
    Usually the number drifts down after a couple of charge cycles, but sometimes their were algorithmic changes that did indeed either change what was displayed (oh well, better guestimate - we had this especially in the 4.x series, also at some point in 5.x) or made a difference in actual rate (recently for P85D)
     
  9. wcfinvader

    wcfinvader Member

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    Drive a leaf and then you'll see why Lol. In all seriousness everything works harder in winter. Takes more electricity to heat (battery is always heated or cooled) takes more electricity to power through the denser air, and takes more electricity to drive through water whether it be in the form of water, ice, or snow.
     
  10. brianman

    brianman Burrito Founder

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    Completely agree. That said, I believe it was Doug_G that mentioned that after one of the 6.1 upgrades he had a rated range increase that "stuck" (stayed) rather than vanishing after a few charge cycles. I'm happy to report that my sig had a similar bump in rated range with one of the 6.1 upgrades as well. My 90% charge is in the 230s consistently for 3 months now. Prior to 6.1, it was 221-223mi. at 90% depending on the ambient temperature (higher for warmer weather).

    I don't expect a bump in 6.2, but I will definitely be keeping an eye on it.
     
  11. dirkhh

    dirkhh Middle-aged Member

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    +4% is significant. WOW. I must have missed that discussion...
     
  12. sandpiper

    sandpiper Active Member

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    Clearly that must be it because right now (in the 2-6 degree range) I'm getting maybe 90% of rated km. At -20, even on a long trip, I was getting no more than 60% - 65% of rated km.
     
  13. SabrToothSqrl

    SabrToothSqrl Active Member

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    I agree it's air temp. When it was zero degrees when I brought my car home. The range was awful. Most days I was almost 450 watt hours a mile. .. Now that it's 65 out I'm around 320.
     
  14. mknox

    mknox Well-Known Member

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    And I am one who has never seen a bump or reduction of even 1 mile across firmware updates. (I have an A-pack). I get 218 Rated Miles at 90% with about 42,000 miles on the clock.
     
  15. sorka

    sorka Active Member

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    Isn't 218 a little low for 90%? Shouldn't it be 238 based on a 265 rated miles?
     
  16. brianman

    brianman Burrito Founder

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    There's 44.5k miles on my sig's clock; also an A pack. FYI.

    - - - Updated - - -

    No. Yes, if there's no degradation and perfect estimation by the capacity sensing and algorithm.
     
  17. mhpr262

    mhpr262 Member

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    Have you ever tried "resetting/recalibrating" the algorithm, as some people do, by driving down the battery close to zero and then keeping it plugged in at 100% for a few days?
     
  18. SabrToothSqrl

    SabrToothSqrl Active Member

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    with 16,000 miles I'm at a 231-235 range at 90% charge.
     
  19. CHG-ON

    CHG-ON Still in love after all these miles

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    No change for me. We have relatively constant temps, day to day.
     
  20. AndreyATC

    AndreyATC Member

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    From my experience after two winters, my only variable is tires.
    When I'm on winter tires, my average is 270-290wh/m wether temperature is 5F or 50F
    As long as the battery warm and no heat used, it's the same regardless of temp

    So, if you drive on summer or all-season tires below 40f, it will kill your milage
     

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