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Regenerative Braking: Standard Mode Quit Working

Discussion in 'Model S' started by MichaelP90DL, Oct 10, 2019.

  1. MichaelP90DL

    MichaelP90DL Active Member

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    Location:
    Lancaster, CA
    I have my car set to Standard for regen braking. This morning, I unplugged the cable, planted my foot on the brake, flipped into drive and took off. A surprise happened as I approached a stop sign: The car barely slowed. Hit the brake. I checked the driving screen and standard regen braking was active. I tapped low regen then standard. Resumed driving. Low regen only. What the heck? I pulled over and stopped. Put it in park, exited and the car turned off. Got back in, resumed driving, but still low regen only. I had a 70-mile trip to LA to do, so I took off, using Autopilot. An hour later, I exited AP and noticed standard regen was finally working. I made a few stops at various shops, and when I resumed driving, the car remained in standard regen. That was a little weird.

    Has that happened to anyone else?
     
  2. GHammer

    GHammer What a long strange trip its been.

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    Lancaster was pretty cold this morning.
     
    • Like x 1
  3. Akikiki

    Akikiki A'-Lo-HA ! y'all

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    G Hammer, ya didn't rename here. ??

    :)
     
  4. GHammer

    GHammer What a long strange trip its been.

    Joined:
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    Location:
    Wren, Oregon
    I have contacted admins and submitted request through contact us to have it changed but so far no action has been taken.
     
  5. Akikiki

    Akikiki A'-Lo-HA ! y'all

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    I've not tried, but I thought we could do that ourselves. I am sure you tried. Just surprised we can't. Hmmm.
     
  6. GHammer

    GHammer What a long strange trip its been.

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  7. Alex362

    Alex362 Member

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    May 16, 2018
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    New Jersey
    What was your state of charge when you started trip?
     
  8. MichaelP90DL

    MichaelP90DL Active Member

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    100%. Up from around 40% the night before.
     
  9. Hugh Mannity

    Hugh Mannity Mediocre Member

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    Jul 31, 2014
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    Location:
    Calgary, AB
    so two things if you've never experienced either:

    1. if your battery is at 100% SOC you will have virtually NO regen until there is enough "room" in the battery to store the power generated back in.

    2. What was the ambient temperature where you live when you left ? Have you ever seen the dotted lines where the re-gen green line shows ? That means the battery is too cold and won't accept a charge. I live in a cold place; if the pack is below freezing I have virtually no regen ever until the pack heats up enough
     
    • Informative x 1
  10. Ole Capt

    Ole Capt Member

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    Location:
    Mobile, AL
    Regen doesn’t work at 100%. You good
     
    • Informative x 1
    • Like x 1
  11. Jarvisd1015

    Jarvisd1015 Member

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    Sep 19, 2019
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    Location:
    San Diego
    This was definitely due to your SOC. I think it's the mid 90's when regen braking starts working. I had this same surprise when I rented a Tesla on a trip and it was fully charged.
     
    • Like x 1
  12. MichaelP90DL

    MichaelP90DL Active Member

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    Oh heck. You're right. Thanks for the reminder. LOL
     
  13. GHammer

    GHammer What a long strange trip its been.

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    I guessed wrong. A cold soaked battery will also not accept a charge and have reduced regen until it warms up. It was on my mind since that's what I ran into this morning, 16F and parked outside.
     
  14. Jim T

    Jim T Member

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    Sep 8, 2017
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    Location:
    Murfreesboro, TN
    Happened to me today. Battery charge @ 60%. Ambient Temp 64 deg F. 'Regenerative Braking' set for standard. Tried toggling between 'standard' and 'low' several times to no effect. Can't think of any other reason for Regen braking being limited....
     
  15. rsg123

    rsg123 Member

    Joined:
    Jan 1, 2018
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    Location:
    Sacramento
    You’re lucky. At 100% SOC I get absolutely zero regen. The car feels as heavy as it actually is when I try to come to a stop.
     

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