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Battery Damage after Sitting @ 0% for 1 or 2 Weeks

Discussion in 'Model 3' started by medphys3, Jul 31, 2020 at 2:26 PM.

  1. medphys3

    medphys3 Member

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    Greetings all-
    Does anyone have any idea on the affects on a Tesla battery after sitting at 0% charge for several week? I know that sitting at 0% and 100% for prolonged periods is bad on the battery, but is there any solid data on how the car/range is affected?

    Also- is there a chart/app that will tell you the past battery charge state(s) over time?

    Background: I have a 2018 LR AWD incoming from Carvana and there's no way to know if the car has been sitting at 0% or has been plugged in.

    AND- if it has sat at 0%, would the damage be seen immediately or would it take a few years for it to show up?

    Thanks in advance for any help!
     
  2. medphys3

    medphys3 Member

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  3. jaydiculous

    jaydiculous Member

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    No idea, but I'd take your car into a service center and have them run diagnostics.

    Teslafi (paid) has battery logging capabilities, but only once it's on your account. You'll have to create a token to link it. You won't know past history charges.
     
  4. camalaio

    camalaio Active Member

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    Most of us aren't battery engineers here. From what I understand, a significant amount of the damage is probably done during the 0% resting phase, not after. If some sort of cracking/weakening of the internals was involved with 0% (I thought this was more of a resting at 100% thing), then later impacts might be possible.

    If you're worried, best would be to see the car charged and see what range it reports before purchase. If it's a very unreasonable range for the percent state, then you know something's wrong.

    Just like a gas car, buying without inspection is indeed risky.
     
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  5. Fernand

    Fernand Active Member

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    Any chance Carvana could ask previous owner for his charging records, you could say, as part of the car's history?

    But why would anyone keep a Tesla, short of a totaled smoking ruin, in a zero charge state?
     
  6. Gwgan

    Gwgan Almost a wagon

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    If the traction battery has been that low that long the 12V battery will need to be replaced before any charging can happen.
     
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  7. camalaio

    camalaio Active Member

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    Even Tesla does this with vehicles in service. They're put on a lot and forgotten about or not actively tended to. Depending on what's enabled, it's easy for it to drop to 20%. The rest is a matter of time, but the rate should be at least a bit slower.

    For used car sales, I can totally see how it ends up in the care of someone that doesn't know to keep a charge on it.

    Unless you came across some extremely benevolent and data-keeping past owner who would just love to be bothered to share information, I highly doubt there's charging records to be shared.
     
  8. medphys3

    medphys3 Member

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    Thanks, everyone!

    Carvana has a 7 day return period and I will be cycling the battery charge several times. That should give me a reasonable indication on it's health.

    Just wanted to get some info from anyone who might have some incite.

    I drive 120 miles round trip everyday for work so it should be easy to figure out lol
     
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  9. JBT66

    JBT66 Member

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    Once the car drains to 20% it shuts down a lot of functions. It can sit for quite some time that way.
     
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  10. jakestgermain

    jakestgermain Member

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    Did you go on the Carvana reddit site to get a 500 off referral?

     
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  11. medphys3

    medphys3 Member

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    Dang, no :/

    Going there now lol
     
  12. jakestgermain

    jakestgermain Member

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    Which one did you get from there
     
  13. MasterC17

    MasterC17 Member

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    On Roadsters, 0% SOC was basically a death sentence.

    On S, X, 3, Y, it's really no big deal. I wouldn't recommend purposely doing it, but the long-term health affects from sitting at 0% for a few weeks are near nothing.
     
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  14. TSLA Pilot

    TSLA Pilot Active Member

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    Are you aware that for what Carvana charges for a used Model 3, you could buy a brand new Model 3 from Tesla instead?

    Also, their used Model 3's come with a warranty reset and that's worth a lot as well . . . .

    The used value of a Model 3 is so high that buying new is often worth the few token extra thousand dollars.
     
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  15. CertLive

    CertLive Member

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    I would charge it right back up to 100% and see what the BMS tells you as I would expect the reading to be quite accurate as its had the opportunity to charge from a real 0 to 100. Then if the next couple of drives are abnormally low in range book it in. I would expect because of the low end buffer the car remained without charge for less time than you think. Latest updates have dramatically reduced the vampire drain on the model 3 when idle for me at least. It would be nice maybe one day if Tesla could add some advanced stats tab to the menu.
     
  16. kbecks13

    kbecks13 Active Member

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    Whats the VIN? I sold my ~2300 LR RWD back to Tesla back in June 2018 to get a Performance Model and they took a few MONTHS to remove it from my account. Over that time, i could see that they left the car sitting in a lot for weeks on end and eventually the battery died when i could no longer see what it was doing which was pretty surprising.
     
  17. SSedan

    SSedan Active Member

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    YOU, created that problem by checking on the car and waking it.
     
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  18. jjrandorin

    jjrandorin Another BMW convert

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    I disagree. Carvana created that problem by not removing the previous owner from the car when they took ownership of it. @kbecks13 should not have had access to the car through the app for "months" and thats the new owners fault. Simply opening his tesla app would show both cars, right?
     
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  19. medphys3

    medphys3 Member

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    5YJ3E1EA6JF038390

    It's blue with 19" wheels.
     
  20. medphys3

    medphys3 Member

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    For an SR+, yes. Not for any long range models. This is a LR RWD.
     

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