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Is this Vampire drain during the night?

Discussion in 'Model 3: Battery & Charging' started by tfraley, Jun 12, 2019.

  1. tfraley

    tfraley Member

    Joined:
    May 22, 2019
    Messages:
    158
    Location:
    Los angeles
    Hey guys,

    So the last few nights I'm noticing a lot of notification from the Tesla App on my iPhone

    Basically looks like it charges up over and over again.

    Model 3 is parked in the garage and plugged to a Tesla wall charger.


    Past few days here in SoCal has been hot, could be AC cooling the batteries down or something.
    My garage is not insolated nor would I even call it finished lol no sheetrock up.

    Thanks

    IMG_3206.png IMG_3196.png
     
  2. AlanSubie4Life

    AlanSubie4Life Efficiency Obsessed Member

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    Location:
    San Diego
    Some people have reported these frequent charging events (that result in no significant charge added). They can occur even when the charging threshold is set below the current SoC, apparently. I haven't seen it myself, though. Seems like it might be related to firmware. Or it may be exactly what you say - I have no idea - but the plots I've seen (power vs. time using meter tracking software) indicate that they are extremely short events, so seems unlikely to be because the car is using shore power instead of battery energy to take care of battery maintenance, etc.
     
  3. Silicon Desert

    Silicon Desert Active Member

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    I can't imagine it being that hot in San Diego at night to cause the battery to be cooled. At least not when I am there. I'd rule out that.
     
  4. tfraley

    tfraley Member

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    Location:
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    Yhe did get the new update last week could very well be a firmware change.

    I'm on 16.3.3

    Yhea I find it hard to think it's the battery cooling at night as well. Just something that just started happening. So not to sure on what's doing it throughout the night.
     
  5. mswlogo

    mswlogo Active Member

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    Location:
    MA
    My understanding from a reasonably close source that this is a "feature" to mask Vampire Drain.
    I hate it and don't leave the car plugged in any more.
     
  6. Rocky_H

    Rocky_H Active Member

    Joined:
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    4,176
    Location:
    Boise, ID
    That sounds about right. I think you can make it stop doing that though if you go ahead and pick a time and use scheduled charging. That way it won't keep doing this all the time. It will wait for the next scheduled time. Does that still work to get around this weirdness?
     
  7. e-sk8r

    e-sk8r Member

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    Huntsville
    Was on 2019.16.2 until last night and was seeing 1 mile per hour phantom drain during the previous 48 hours. 2019.20.1 installed last night and I got a couple “top off” charging messages like the OP this morning. Will see how the drain is today. No extra apps running and did the password change operation to be sure.
     
  8. e-sk8r

    e-sk8r Member

    Joined:
    May 15, 2019
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    Location:
    Huntsville
    Model 3. SR+. 70s overnight
     

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