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Increase max range / recover lost max range

Discussion in 'Model S: Battery & Charging' started by slcuervo, Jul 9, 2015.

  1. slcuervo

    slcuervo Member

    Sep 26, 2014
    I have recently completed a 10.000 km (about 6.000 mi) road trip in Europe, and I've charged the S85 battery to 100% capacity half a dozen times.

    I have noticed that doing so has increased the max range. Has anyone else seen this, and does anyone know why?

    I have posted a couple of blog entries about this, with figures and pics. Please check them:

    1st entry: European Road Trip in a Tesla Model S: Maximum Range and Battery Degradation in the Model S

    2nd entry: European Road Trip in a Tesla Model S: Battery degradation (part 2)
  2. islandbayy

    islandbayy Active Member

    Feb 25, 2013
    Greendale, Wisconsin
    Shows the increase in range: Tesla Motors Model S: Range Update 54,000 Miles 20,000 on Replacement Battery, INSANE!!!!! 209! - YouTube
    Explains Why the increase in range: Tesla Motors Model S: Increase in Rated Range Explained - YouTube
  3. David99

    David99 Active Member

    Jan 31, 2014
    Brea, Orange County
    Several people have seen this. Especially those that usually charge to lower levels on a daily basis. Tesla explained in an email that the capacity of the battery can't easily be determined when it's charged and discharged partially which is what everyone does using their car. So they have an algorithm that calculates it based on a number of data points. Over time this calculation can get a little out of line and it will be more on the conservative side (= estimating lower). If you charge your battery 100% and then drive it down to almost zero the car can calculate the actual capacity pretty well and algorithm sort of gets re-calibrated. Again, this isn't a theory, it's what Tesla explained.

    I wouldn't use the 'rated miles' display as a gauge for actual battery capacity. There are many factors that the algorithm considers. I often see the rated range jump up or down in the middle of driving or while the car is parked. Obviously the battery didn't gain or lose capacity in those moments. The only true test would be to drive the battery from 100% to zero and see how much energy you were able to get out of it. That's the only thing that counts. How many miles you can actually drive isn't always in line with what the 'rated miles' display shows.
  4. mknox

    mknox Well-Known Member

    Aug 7, 2012
    Toronto, ON
    Lots of people have seen this, but I have not. I recently completed a road trip and actually lost a few miles of range.
  5. AmpedRealtor

    AmpedRealtor Active Member

    Jun 30, 2013
    Buckeye, AZ
    You and I must have sibling battery packs, as mine seems to behave similarly to yours. I've completed multiple cycles of driving down to zero, or very close to zero, and charging back to 100%. One time I lost two miles, but then got those back. In any case, my range never went UP. It either stayed the same or dropped.

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