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

Car won't charge past 96%

Discussion in 'Model S' started by random155, Dec 28, 2019.

  1. random155

    random155 Member

    Joined:
    Mar 18, 2019
    Messages:
    787
    Location:
    NJ
    Anyone ever have an issue with their car not charging past a certain percentage. I cant say wether or not its related to my most current FW (40.2.3) or if its something else. I very rarely charge passed 90% but due to a recent trip she wont go past 96%. This was duplicated this morning after i ran the battery down to 9% yesterday and charged all night.
     
  2. ahkahn

    ahkahn Active Member

    Joined:
    Jun 22, 2017
    Messages:
    1,080
    Location:
    Chicagoland
    Sounds like your battery pack is cold. It won't go to 100% if it's too cold.
     
    • Disagree x 1
  3. gaswalla

    gaswalla Model S,3,X.. CT with Austin delivery

    Joined:
    Sep 23, 2012
    Messages:
    3,189
    Location:
    San Diego
    • Informative x 1
  4. croman

    croman Active Member

    Joined:
    Nov 21, 2016
    Messages:
    4,605
    Location:
    Chicago, IL
    That's silly. Charging heats the pack. In no way is the pack functioning properly if it can't charge from 9% to 100.

    I'd schedule a service center visit and get a new battery from Tesla. Definitely seems like a module failure.
     
    • Funny x 2
    • Like x 1
  5. Mike Robinson

    Mike Robinson Member

    Joined:
    Feb 3, 2016
    Messages:
    521
    Location:
    Atlanta GA
    Hmmmm, I was under the impression that the battery loses range as it ages. My MS100D only charges to 316 miles now, versus 335 when new. Should I expect Tesla to replace my battery??
     
  6. random155

    random155 Member

    Joined:
    Mar 18, 2019
    Messages:
    787
    Location:
    NJ
    You're thinking of mileage, not percent. The battery will not lose percentages. Degradation = 100% is 254 vs 265 when new. Not %100 is now 96%. The car should still charge to 100% but not get the original mileage.
     
    • Like x 3
    • Helpful x 1
  7. quickstrike12

    quickstrike12 Member

    Joined:
    Jun 13, 2018
    Messages:
    592
    Location:
    Fort Worth Texas
    By chance did it finish leveling and calculating? That last few percent can take a very long time to complete. And this is many times where it’s leveling cells and recalculating it’s final numbers. im sure you know this already and it was done but just a thought.
     
  8. Cavell219

    Cavell219 Member

    Joined:
    Jun 22, 2019
    Messages:
    33
    Location:
    Indiana
    Very stupid question and not trying to insult. But did you have the slider to 100%? If so maybe try backing it off and then back to 100%
     
  9. random155

    random155 Member

    Joined:
    Mar 18, 2019
    Messages:
    787
    Location:
    NJ
    0006DB28-58AE-493C-B304-F71E268B84A1.png got up to 97 today but went back down to 96 shortly thereafter.
     
  10. ucmndd

    ucmndd Well-Known Member

    Joined:
    Mar 10, 2016
    Messages:
    5,954
    Location:
    California
    This is somewhat common, especially if it’s been a long time since you’ve charged to 100%. In my case a few deep discharge-charge cycles has always cleared it up.
     
  11. ahkahn

    ahkahn Active Member

    Joined:
    Jun 22, 2017
    Messages:
    1,080
    Location:
    Chicagoland
    Not if the ambient temp is cold and the amps slow down. It only heats up at higher amperage, and once you hit 96% it's already well tapered down to 5-10 amps and can easily get cold. Mine has done this routinely, and by the next charge is fine.
     
  12. Tam

    Tam Well-Known Member

    Joined:
    Nov 25, 2012
    Messages:
    8,163
    Location:
    Visalia, CA
    Most likely, this is Battery Management System calculation drift as time passes.

    That means although it calculates that the calculation is now 96% but in reality, there's no more room to charge it anymore so it should be labeled as 100% instead.

    That's a similar but opposite complaint: Owners set charging at 80% at night but when they woke up, it showed 86%. It didn't intentionally overcharge and it did stop at 80% as it calculated last but then it re-calculated and reported the new display as 86%.

    These are examples of miscalculations even though there's nothing wrong with your battery.

    Numerous owners have reported that Service Center advised them in writing to set their charge at 90% and not lower to avoid these kinds of calculation drifts.

    One owner is kind enough to post the receipt with the advice.
     
  13. random155

    random155 Member

    Joined:
    Mar 18, 2019
    Messages:
    787
    Location:
    NJ
    Ok that makes sense. I dont charge every night. My charging is sporadic at best. Sometimes once a week, with some supercharging thrown in there for a few kw.
     
    • Like x 1
  14. gaswalla

    gaswalla Model S,3,X.. CT with Austin delivery

    Joined:
    Sep 23, 2012
    Messages:
    3,189
    Location:
    San Diego
    Ok - you need to turn on the notifications for charge completed on your app. It should end at a 100 percent when completed. If it stops before 100, not normal (although some with batterygate issues have had that happen). After charge completed, there will be vampire drain and balancing, and that’s another issue
     
  15. random155

    random155 Member

    Joined:
    Mar 18, 2019
    Messages:
    787
    Location:
    NJ
    I do, and the notification says charging completed at 97%
     
  16. ucmndd

    ucmndd Well-Known Member

    Joined:
    Mar 10, 2016
    Messages:
    5,954
    Location:
    California
    Like I said. A few deep discharge cycles will fix it. This isn’t something to overthink.
     
  17. Tam

    Tam Well-Known Member

    Joined:
    Nov 25, 2012
    Messages:
    8,163
    Location:
    Visalia, CA
    That is not a problem.

    The problem is the bad charging habit.

    Service Center documents in writing for owners that they should charge to 90% daily.

    It's fine to not charging 90% daily but your battery gauge is messed up quicker that's all.

    And that may cause owners' anxiety that there's something wrong with their battery and time and effort to take it to Service Center just to be slapped with a citation of bad charging habit.
     
  18. cookie99

    cookie99 Member

    Joined:
    Mar 14, 2016
    Messages:
    866
    Location:
    California
    mine would stop at 97% too, I ended up doing slow charging from empty to balance the pack, seemed to have fixed it.
     
  19. Wratran

    Wratran Member

    Joined:
    Feb 17, 2019
    Messages:
    298
    Location:
    Dallas
    Is there any solution to fix charging stop at 96%?
     
  20. ucmndd

    ucmndd Well-Known Member

    Joined:
    Mar 10, 2016
    Messages:
    5,954
    Location:
    California
    Did you read this thread and try what was suggested?
     

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