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Strange Ideal vs. Estimated miles behavior

Discussion in 'Roadster' started by Strib, Mar 21, 2015.

  1. Strib

    Strib Member

    Joined:
    Jan 3, 2015
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    Location:
    Alamo, CA
    I thought the Ideal Miles calculation was based on the CAC and the Estimated Miles was discounted from this by an amount that depends on one's driving habits. But several times, while conservatively driving about 50 miles on the freeway, my Estimated Miles display actually EXCEEDED my Ideal Miles display by 4-5 miles. Anyone understand this?
     
  2. Sparrow

    Sparrow S105/ Roadster 189

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    Location:
    Marietta, GA
    It sounds like you answered your own question. You drove more conservatively than the ideal energy rate, therefore the estimated range became higher than the ideal.
     
  3. ViperDoc

    ViperDoc Roadster 1305

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    Jun 24, 2011
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    Vermont
    If I recall correctly, the "Ideal" is based on a stable average speed of 55 mph. I have had the experience you have had, but usually when I have been driving on roads with speed limits around 35 or 45 mph
     
  4. tonybelding

    tonybelding Active Member

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    Location:
    Hamilton, Texas
    I've also seen this happen.

    What we really need is "Forecasted Miles" based on how you're *going* to drive. Still waiting for that crystal ball upgrade, tho...
     
  5. thefortunes

    thefortunes Member

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    Jun 14, 2013
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    Wisconsin
    The other thing that factors in is that the Estimated Miles is based on a short (I'll let someone else chime in here as I do not recall) sampling distance.

    Because the last 6 miles of my 54 mile typical commute home is through town, I regularly reach my garage with more Estimated than Ideal miles (at least in the summer).
     
  6. Chris Lockfort

    Chris Lockfort 2008 Roadster 1.5 + 2015 Zero SR

    Joined:
    Dec 19, 2013
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    Location:
    Palo Alto, California, United States
    If I recall it's 40 miles, and it's stored in one of the not-encrypted files that you can dump via USB (whpm.log).

    My estimated goes over ideal all the time when I come down from mountains, charging my car as I zoom past vehicles doing the considerably more inelegant periodic braking and idling.
     

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