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Charging to 90%, cooling fans stay on and drain battery

Discussion in 'Model S' started by Lectric_Agent, Dec 22, 2019.

  1. Lectric_Agent

    Lectric_Agent 2015 S85 AP1

    Joined:
    May 25, 2019
    Messages:
    88
    Location:
    Orange County
    After charging my car (at 240v/40A) I have to unplug and move it into my carport. Ever since 2019.40.x when I charge to 90% my cooling fans stay on for hours and my charge will drop by 2-3% in a matter of hours! This never happened before.

    Is anyone else experiencing this?

    If this is the new norm, is it even worth charging to 90% if it’s just going to discharge quickly by cooling the battery for hours on end??

    fyi i also have the greatly reduced regen on a “cool” morning (50-60 deg.). This happens even after charging for almost 2hrs at 40A!!
     
    • Informative x 1
  2. Lectric_Agent

    Lectric_Agent 2015 S85 AP1

    Joined:
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    Messages:
    88
    Location:
    Orange County
  3. Gixx1300R

    Gixx1300R Member

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    orlando
    Have you tried rebooting?
     
  4. Lectric_Agent

    Lectric_Agent 2015 S85 AP1

    Joined:
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    88
    Location:
    Orange County
    Yes, lots of reboots!
     
    • Like x 1
  5. Gixx1300R

    Gixx1300R Member

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    I am on 2019.40 and my fans aren't running continuously while charging.
     
  6. Lectric_Agent

    Lectric_Agent 2015 S85 AP1

    Joined:
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    Location:
    Orange County
    What’s your ride? I couldn’t find it in your profile.

    I saw someone else post about my issue recently but I can’t remember where, I think it was in the “software” part of the forum
     
  7. Uncle Paul

    Uncle Paul Well-Known Member

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  8. Gixx1300R

    Gixx1300R Member

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    Location:
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    2013 P85
     
  9. Lectric_Agent

    Lectric_Agent 2015 S85 AP1

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    Location:
    Orange County
    Have you been hit with batterygate? I’ve been lucky
     
  10. Gixx1300R

    Gixx1300R Member

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    orlando
    Yes I have, I lost over 40 miles of range when I updated the software, slow charging at home and supercharging. Also I can no longer charge to 100%
     
  11. BrokerDon

    BrokerDon Active Member

    Joined:
    Aug 23, 2014
    Messages:
    1,323
    Location:
    Newport Coast, CA
    My 2015 P85DL did this 2 days ago randomly when it was plugged into our Tesla High Power Wall Connector (gen1 HPWC on 100A circuit / 80A max output) after had been charged overnight to 90%. I drove it yesterday and recharged to 90% again overnight and the cooling fans aren't running this morning while it is still connected to my HPWC .

    Christmas "Easter Egg" ???

     
  12. dha820

    dha820 Member

    Joined:
    Mar 12, 2014
    Messages:
    8
    Location:
    Bay Area, CA
    Any update or resolution on this one? Just noticed last week that my car has also been doing this. I'm also on 2019.40.

    FWIW, i did not lose range with battery gate but i do experience slower supercharging speeds.
     
  13. Doanster1

    Doanster1 Member

    Joined:
    Feb 14, 2018
    Messages:
    737
    Location:
    Oregon
    I have been experiencing that before 2019.40, but I rarely charge to 90%. What has changed for me is that there’s now a high pitched whine without the cooling fans running even though I charge nightly to 80%. I think it’s one of the cooling pumps running. I’m now on 2019.40.2.3 (P85D) and don’t use preset departure, etc.
     
  14. rowdy

    rowdy Member

    Joined:
    Jan 18, 2016
    Messages:
    203
    Location:
    Australia
    I've heard lowering the charge to 75% stops it. Probably not much point charging to 80% unless you're going to drive straight away as it'll drop a few % over the next few hours from the cooling/pumps
     

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