Battery Degradation

Discussion in 'Model S' started by Rusty, Aug 8, 2017.

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Have you noticed battery charge limit based on odometer mileage?

  1. Yes

    100.0%
  2. No

    0 vote(s)
    0.0%
  1. Rusty

    Rusty New Member

    Joined:
    Dec 15, 2016
    Messages:
    4
    I own a 2012 Model S P85 Signature that I purchased used in Sep 2016. It had approximately 60K when I purchased it. I love the car. I just recently crossed 80K. Here is my observation and concern with battery degradation.

    Since 60K my car has fully charged to 240-245 miles and 90% at 220 miles.

    I recently took two road trips two weeks apart. The first was to Shreveport Louisiana from Chattanooga TN. On this trip I experienced the 240 miles range.

    Two weeks later right after crossing 80K on the odometer, I travelled to Gulf Shores Alabama. On this trip I could only achieve 230 miles for 100% charge and 207 miles for a 90% charge.

    I understand that my battery will degrade, but I don't expect it to happen in 10 mile increments. My hypothesis is that Tesla is limiting charge based on mileage. There is no other explanation I can give for this step change over a two week period. The weather conditions were similar, and I used multiple superchargers on both trips.

    I understand if Tesla wants to program limits into my Tesla to preserve performance of the battery. It would be nice if they would tell me what those are so I can know what to expect.
     
  2. Rusty

    Rusty New Member

    Joined:
    Dec 15, 2016
    Messages:
    4
    Update: My range has gradually come back up to approximately 242 miles (approx. 91% of original). I don't know why the sudden drop to 230 miles of range. It must have been some combination of road trips with supercharger use, charging to 100% a few times, or the heat (temps were 98 degrees in Shreveport. I am glad to be back in the 240's range and am glad this was only temporary. I am interested if anyone else has experienced something like this...
     
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