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Used or new

Discussion in 'Model S' started by Dan5, Mar 2, 2013.


New or used

  1. New 60 kwhr

    5 vote(s)
  2. Old 85 kwhr

    9 vote(s)
  1. Dan5

    Dan5 Member

    Oct 13, 2011
    Delran, NJ
    I'm trying to get a grasp on this from a financial perspective

    It looks like an 8 year old 85 kwhr battery will have as much charge, or more than a new 60 kwhr battery

    Assuming the design and technology does not change drastically, what would you do?

    To put in perspective

    A new chassis with new components with "miles" on the engine

    In this case 60 kwhr


    A "new engine" with an old chassis and components

    Let's say 67 kwhr

    It's a tough choice
  2. Bearman

    Bearman Member

    Nov 17, 2011
    Since I dont have enough real data about how the battery will degrade after the supposed 8 years or miles accrued there is a risk of changes to the rate of degradation in the future, so just from the point of battery degradation there is more risk in going with the old one. In the future we might see that the degradation turns out to be less over time and then it might make good sense to go for the old one but not knowing adds to risk and hence a cost to that risk that has to be added into the evaluation. I would look to see if there are any data in the future about the rate of degradation after time passes to put a valuation to that risk, if it remains linear at a steady state then one might put a low price to the risk one is taking.

    To phrase this into common language, if there aren't any bad news revealed in the future about the rate of battery degradation then one can compare the batteries by their capacity only. Other than that one will just find at what price the general state of the old car makes sense compared to a new 60 kWh car.
  3. Robert.Boston

    Robert.Boston Model S VIN P01536

    Oct 7, 2011
    Portland, Maine, USA
    An impossible decision without (a) a definition of "old" and (b) pricing. If "old" is 8 years, then the battery capacity will probably be pretty similar but the new 60kWh will have new suspension, new electronics, etc. which is worth a good bit in potential repair costs. More to the point, in 8 years I doubt that Tesla will sell a 60kWh pack; advances in battery technology will move the target.
  4. dsm363

    dsm363 Roadster + Sig Model S

    May 17, 2009
    I agree. If things progress, 85 kWh might be the smallest pack offered at that point.
  5. DriverOne

    DriverOne Supporting Member

    Aug 20, 2012
    Austin, TX
    We'll see, it's all speculation. I would argue that the 60kWh battery will stay around, but (hopefully!) less expensive. Tesla's car for the masses.

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