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 or making a Paypal contribution here: paypal.me/SupportTMC

Battery Degradation/Range Loss

Discussion in 'Model S' started by viet658, Feb 18, 2015.

  1. viet658

    viet658 Member

    Joined:
    Aug 11, 2013
    Messages:
    62
    Location:
    Pomona, CA
  2. Gizmotoy

    Gizmotoy Active Member

    Joined:
    Sep 16, 2013
    Messages:
    3,132
    Location:
    Bay Area, CA
    Good stuff. I'm at about 3% loss at 10k miles, but I'm not sure if that's a balancing issue or normal.

    Strangely, they guess 92% capacity at 100k miles, but their most representative sample (the car with the highest miles) had 94% at 52k. That's kind of unusual, given that range loss is due to both usage and time. That is to say, all things equal, a 4 year old vehicle with X miles should have less range than the same vehicle with X miles at 1 year old. I wonder what factored in to that discrepancy?

    Tom Saxton had some nice visuals for his data at TMC Connect... would have been nice to see something similar here.
     
  3. viet658

    viet658 Member

    Joined:
    Aug 11, 2013
    Messages:
    62
    Location:
    Pomona, CA
    Actually they mention one vehicle from the Plug in America study (Second Link) which had about 92,000 miles and still about 92% of capacity.

     
  4. Gizmotoy

    Gizmotoy Active Member

    Joined:
    Sep 16, 2013
    Messages:
    3,132
    Location:
    Bay Area, CA
    Missed that somehow. Thanks for the clarification. So the explanation for the discrepancy is that they consider it an outlier.
     

Share This Page