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 and becoming a Supporting Member. For more info: Support TMC

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:
    52
    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:
    196
    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.
     
    • Love x 1
  3. andrewket

    andrewket Well-Known Member

    Joined:
    Dec 20, 2012
    Messages:
    5,698
    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 2
    • Funny x 2
  4. Tam

    Tam Active Member

    Joined:
    Nov 25, 2012
    Messages:
    3,948
    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:
    3,699
    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 4
  6. abasile

    abasile Conscientious investor

    Joined:
    Oct 21, 2012
    Messages:
    928
    Location:
    San Bernardino Mts., CA (Elev. 6100' / 1900m)
    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:
    52
    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:
    20
    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:
    365
    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.
     
  10. gobowz

    gobowz New Member

    Joined:
    Feb 24, 2013
    Messages:
    2
    Location:
    United States
    Im in Austin and I just noticed the same thing. Its about 35 degrees today. I was going to call the repair center. Ill just keep an eye on it for now.
     
  11. Big Earl

    Big Earl Supporting Member

    Joined:
    Jul 12, 2017
    Messages:
    1,111
    Location:
    Springfield, VA
    Don’t worry, it’s normal. You’ll start noticing regeneration limits when temperatures drop below about 45F. Overnight in 35 degree weather, expect very little regen to be available if you haven’t preheated the vehicle.
     
  12. MBCottage

    MBCottage Member

    Joined:
    Jun 20, 2016
    Messages:
    20
    Location:
    TX
    Hi, I’m outside of San Antonio... Regen stopped working Friday when it was HOT Mid to high 80’s Mine are hardly engaging at any speed. This morning it was 49 degrees no difference. I’m down to 80 miles and only charged it to 170 last Thursday night. Feels like rolling at Max Charge!
     
  13. 1375mlm

    1375mlm Member

    Joined:
    Jun 29, 2017
    Messages:
    49
    Location:
    Texas, Houston
    To be fair, my V9 has completely wrecked the manual feature of the car. Can’t access it, all I see are white blank sheets every time I try to access a section.
    Not saying that there isn’t a hard copy, but it’s definitely less convenient
    Maybe give him the benefit of doubt?
     
  14. bell2041

    bell2041 Member

    Joined:
    Mar 17, 2018
    Messages:
    129
    Location:
    Brooklyn
    It just got colder here in NYC, and for some reason, I have limited regen with just 56F outside, and it's limited for like 15 minutes of driving with like 10 minutes of preheating before drive.

    regen.jpg
    Is that normal? in this time 20 minutes I am burning 50% more energy (Avg. more then 600 Wh/m)
     
  15. Tam

    Tam Active Member

    Joined:
    Nov 25, 2012
    Messages:
    3,948
    Location:
    Visalia, CA
    Maybe 57F is cold enough to reduce regen.

    Was your cabin heater on which might explain the 600 Wh/mi?
     
  16. Big Earl

    Big Earl Supporting Member

    Joined:
    Jul 12, 2017
    Messages:
    1,111
    Location:
    Springfield, VA
    Yes, in my experience, temperatures in the mid-50s are enough to limit regeneration for the first few miles of driving. The battery heater won't come on until the battery temperature drops below 45 or 50 degrees and it will only heat it back up to that level, so you'll always have limited regen when starting out in the cold, even if you preheat.
     
  17. TexasEV

    TexasEV Well-Known Member

    Joined:
    Jun 5, 2013
    Messages:
    6,718
    Location:
    Austin, TX
    It’s also online.
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC