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Overcharge

Discussion in 'Model S: Battery & Charging' started by brianman, Feb 10, 2013.

  1. brianman

    brianman Burrito Founder

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    So here's a fun one.

    Notes:
    • Car left house with standard charge (239 mi).
    • Beginning charging session said "+0 mi". Absolutely certain.
    • Only one charging session, restoring to standard charge.
    • Setting is on "Rated", not "Ideal".

    OverCharge.jpg
     
  2. cinergi

    cinergi Active Member

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    Do you know what the rated range was when you started the charge?
    What's your 30-mile average whpm?
     
  3. brianman

    brianman Burrito Founder

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    #3 brianman, Feb 10, 2013
    Last edited: Feb 10, 2013
    Sadly < 0, and displayed as zero. Bad planning of the impact of weather and hilly freeway consumption. STRONGLY not recommended.

    I hit zero < a mile from my house. I think the navigation said 0.2 miles.

    - - - Updated - - -

    274

    A couple more interesting charts relative to the now 241 rated capacity:
    Average30.jpg
    Average5.jpg

    I was beating the rated for the 30 mile even with the hill included. So my previous 30 rating might have beat the ideal comfortably. Never seen that in 40°F weather in Seattle area before. I was approximating coasting pretty well I guess.
     
  4. FlasherZ

    FlasherZ Sig Model S + Sig Model X + Model 3 Resv

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    Perhaps the difference is the number of miles used by vampire load while charging, then?
     
  5. cinergi

    cinergi Active Member

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    Then my guess is it's showing projected miles (just like it's showing projected MPH charge rates). The math works (~241 miles for full standard charge at 308 whpm vs. 270-ish at 274 whpm).
     
  6. brianman

    brianman Burrito Founder

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    @FlasherZ - Could be, but I though vampire load came from the wall rather than the battery while plugged in.

    - - - Updated - - -

    Hm. What was the verdict on that theory, and the way to "nudge" it to Rated properly? Should toggling to Ideal and the back to Rated correct it (to show Rated charging rather than Projected)?
     
  7. cinergi

    cinergi Active Member

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    I'm 100% sure that theory is accurate, but it's not been admitted as a bug yet. I've been talking to Tesla about it. Right now there's no way to fix it (e.g. toggling it to ideal and back).
     
  8. brianman

    brianman Burrito Founder

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    Okay. Thanks for the heads up.
     
  9. brianman

    brianman Burrito Founder

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    One more note about this:
    My recollection was that this theory was about the rate ("31 mi/hr") not the tallied charge ("+268 mi"). So to me, this is news. Please make sure Tesla is aware that both fields are affected by this issue as you continue the conversation. Thanks.
     
  10. cinergi

    cinergi Active Member

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    Correct. My theory about tallied charge is brand new with this post.
     

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