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Tesla Model S - Cold Weather Performance

Discussion in 'Video' started by doug, Nov 22, 2013.

  1. doug

    doug Administrator / Head Moderator

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    #1 doug, Nov 22, 2013
    Last edited by a moderator: Mar 13, 2016
  2. Al Sherman

    Al Sherman It's about THIS car.

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    Nice. Looking forward to trying it with the new Hakka R2's!
     
  3. Raffy.Roma

    Raffy.Roma Active Member

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    Interesting! I already knew that a RWD car with ESC and winter tires could perform very well on the snow, even better than an AWD car not having winter tires and ESC. Of course IMO an AWD Model S with winter tires would do even better.
     
  4. Doug_G

    Doug_G Lead Moderator

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    I think Tesla has done some tweaks to the TC system since last winter. I'll be very curious to see how they work in extreme weather conditions.
     
  5. mknox

    mknox Well-Known Member

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    Indeed. My Hakka R2's finally came in and go on the car tomorrow. Nick of time too, because I think there's some snow in the forecast.
     
  6. zax123

    zax123 CDN Model S P308

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    I love the handles popping out even though they are covered in ice!
     
  7. Mario Kadastik

    Mario Kadastik Active Member

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    I found that the most impressive part as well. I think that one has been a nagging topic in various circles about the winter performance, that how are you going to get the handles if the car is frozen over and they are inside the car. Now I can point them to the last part of this video ;)
     
  8. Grassy Knoel

    Grassy Knoel Member

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    Been able to survive a couple of hearty dumps of snow with the all seasons. The R2s are getting installed today so I'm looking forward to the added traction but even without the TC's been fantastic.
    Couple of questions for those who've been through a winter in the Model S.
    1. Is is typically to charge for 2+ hours and still have limited regen? Weather's been -20C overnight but the car's in an unheated garage so no wind.
    2. Did you set regen braking to low? I already had a moment where regen kicked in on slippery conditions and I briefly lost control
     
  9. Doug_G

    Doug_G Lead Moderator

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    Yes. At those temperatures, neither preheating nor charging will eliminate regen limits. In fact neither will driving on a highway for two hours. You'll certainly have some regen, but not full power.

    No. I just drive it like a manual transmission car, and control both the acceleration and the braking through the pedal.
     
  10. zax123

    zax123 CDN Model S P308

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    On this... I'm assuming there is no way to tell the car to preheat the battery pack using shore power yet, am I right?
     
  11. Doug_G

    Doug_G Lead Moderator

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    There most certainly is. Plug the car in and use the Remote App to turn on the cabin heater.

    At -20C and below this makes a huge difference to (a) cabin temperature, (b) initial driveability because you at least have 1/2 regen power, and (c) initial power consumption because it doesn't have to keep running the pack heater at full power (if at all). It just won't completely eliminate the regen limits.
     
  12. zax123

    zax123 CDN Model S P308

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    Hmmm... I guess I just hadn't noticed. I use VisibleTesla or the app all the time, and I still have a regen limit (and sometimes an output power limit) when I get into the car after ten minutes of heating from shore power. Maybe I need to do 15 minutes...
     
  13. mknox

    mknox Well-Known Member

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    I think I discovered that if you have the system in Range Mode, battery pre-heating is either disabled or severely scaled back. I would have heavy re-gen limits in the morning in spite of pre-heating and further, the re-gen limits would take almost 45 minutes / 60 km to clear. Once I turned off Range Mode, the battery pack behavior became much more "user friendly". No more morning limits and in the evening when cold soaked, they would clear much faster. I don't even notice any difference in energy efficiency with Range Mode off either. Cabin heating was perfectly fine in either Range or Normal mode.
     
  14. zax123

    zax123 CDN Model S P308

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    I have yet to use Range mode, so I guess I'll leave the setting where it is unless I go long distance... thanks for the tip!
     
  15. mknox

    mknox Well-Known Member

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    I turned Range Mode on in the summer to help reduce the embarrassingly loud a/c compressor noise and guess I had just left it there. It didn't seem to impact the ability for the car to heat the cabin up nicely, so I originally figured I was saving a bit of energy by leaving it there.
     
  16. Doug_G

    Doug_G Lead Moderator

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    Are you sure about that? It would be counterproductive to limit pack heating while you are plugged in, especially on an actual road trip! I will have to verify when it gets colder.

    Also 10 minutes is nowhere near enough to preheat the pack in severe cold. I would recommend 30 minutes.
     
  17. zax123

    zax123 CDN Model S P308

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    Will definitely try longer pre-heats. But I'm talking temps only between 0 and 5 deg.C. I don't know what it will be like in -20 to -15 deg.C.

    Suppose I was plugged in only at 115V @ 12A, would that be enough for the pack heater, or would I actually be partially draining battery power if I did a preheat?
     
  18. Grassy Knoel

    Grassy Knoel Member

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    Thanks Doug_G for confirming what I expected regarding the regen limitation. I guess I'll just have to get used to the dashed yellow for the next 6 months since I rarely drive more than 30 minutes at a time. Looking forward to a drive this weekend with the R2s on though.
    Of note, I had a similar experience with the handles popping through the ice yesterday. Sounded horrible but no apparent ill effects. Happy winter driving all.
     
  19. Zextraterrestrial

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    #19 Zextraterrestrial, Nov 22, 2013
    Last edited: Nov 22, 2013
    charge port is a different story though ;>
    mine was kinda frozen open this morning and when I closed it there was ice that kept it from shutting off the light

    + the frameless windows don't like a car that was wet before it froze and Coastal Humboldt never gets 'that' cold
     
  20. Doug_G

    Doug_G Lead Moderator

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    The pack heater at full power draws about 6 kW. The cabin heater at full power can also draw 6 kW. The combination is about 10X what you can pull from 110V AC.
     

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