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Regenerative braking not working in cold?

Discussion in 'Model X' started by Godzill4, Jan 10, 2017.

  1. Godzill4

    Godzill4 Member

    Joined:
    Oct 19, 2016
    Messages:
    41
    Location:
    Austin, TX
    Anyone else experiencing regen brake not working in the cold? I'm here in Texas and it gets no where near as cold as up north and I find it surprising that regen brake isn't kicking in till i hit about 20-30 mph.

    Thoughts?
     
  2. gfb107

    gfb107 Member

    Joined:
    Sep 3, 2015
    Messages:
    154
    Location:
    Cary, NC
    Have you charged to 100%? Regen won't work with 100% charge, as there's no where for the electricity to go. Once the battery drains a bit, regen starts working again.
     
  3. andrewket

    andrewket Well-Known Member

    Joined:
    Dec 20, 2012
    Messages:
    5,534
    Page 55 of the Model S manual:

    "The amount of energy fed back to the Battery
    using regenerative braking can depend on the
    current state of the Battery and the charge
    level setting that you are using. If regenerative
    braking is limited, a dashed yellow line
    displays on the power meter. For example,
    regenerative braking may be limited if the
    Battery is already fully charged or if the
    ambient temperature is low."

    This service brought to you by the Tesla Owners Club Mechanical Turk. "Cut and pasting from the owners manual for customers who won't RTFM since 2013." (c) 2017, all rights reserved.
     
    • Like x 1
  4. Tam

    Tam Active Member

    Joined:
    Nov 25, 2012
    Messages:
    2,373
    Location:
    Visalia, CA
    That's normal. It doesn't wait for extreme cold or snow or ice in Southern California either (which doesn't get snow or ice in winter unless you drive up to those mountains).
     
  5. Az_Rael

    Az_Rael Supporting Member

    Joined:
    Jan 26, 2016
    Messages:
    2,341
    Location:
    Palmdale, CA
    My regen starts getting limited when my car has been cold soaking in 45 degree weather. So it's doesn't have to be super cold for it to happen.
     
    • Informative x 2
  6. abasile

    abasile Independent Software Eng.

    Joined:
    Oct 21, 2012
    Messages:
    533
    Location:
    San Bernardino Mts., CA (Elev. 6100' / 1800m)
    We live at altitude and park our Model S outdoors, where it is frequently soaked in below-freezing temperatures. The trick is to pre-heat and/or charge the car shortly before driving it. That causes the car to heat the battery pack which means that we usually have at least 30 kW of regen available when we start driving. Even at 80% state of charge, we're then able to drive down the mountain (4900' / 1500m descent) with enough regen to stay off the brake pedal.
     
    • Informative x 1
  7. Godzill4

    Godzill4 Member

    Joined:
    Oct 19, 2016
    Messages:
    41
    Location:
    Austin, TX
    ahh I see. I usually have my battery set to daily driving charge so it won't ever charge fully and it'll leave about 20 miles to full charge. Here in central Texas there are those rare days where it hits about 35 degrees or so and thats when I can tell that regen is slow to kick in. Nonetheless, Im glad you guys helped ease my mind!
     
  8. Mine GO BOOM

    Mine GO BOOM Member

    Joined:
    Jul 11, 2016
    Messages:
    17
    Location:
    Here
    This past Sunday in NYC, I didn't get any regenerative breaking until I was about 20 miles into a drive. It was in the teens all day, so pretty cold. Previously with 40s temperature, I had at least a tiny amount of regenerative breaking at the start, so was surprised I had completely none. Side note, I discovered this car coasts like a boss, never felt so low of friction before even when putting my previous cars into neutral.
     
  9. Missile Toad

    Missile Toad Member

    Joined:
    Aug 30, 2016
    Messages:
    263
    Location:
    Houston
    I had a contactor failure at about 88 MPH. the S 70D coasted at least 1.5 miles until I applied friction brakes to stop it. It might be a little bit slipperier than the X.
     

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