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This never happened to me before

Discussion in 'Roadster: Performance' started by daniel, Jul 5, 2012.

  1. daniel

    daniel Active Member

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    Spokane, WA
    Today I went out to the car, and when I got in, it said my ideal range (Standard charge) was 186 (it's always 186 to 189, usually the former) but the estimated range was 202 miles. It's the first time my estimated range has been greater than my ideal range. Yesterday I had driven 60-odd miles mostly on rural secondary highway roads, at around 60 mph. Probably around 5 miles in town getting to the out-of-town road. It was a warm day but not excessively hot, and I had the Taylor mesh top on. I presume that increases the drag somewhat, but maybe not??? Anyway, that was cool to see the greater estimated range.
     
  2. NigelM

    NigelM Recovering Member

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    Most of my driving is around town and with near zero elevation changes, I regularly see estimated range higher than ideal. My record is seeing 213 miles estimated, 188 ideal all in standard mode.
     
  3. W.Petefish

    W.Petefish Active Member

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    It has happened to me before. Although my record was 203 mi in standard.
     
  4. NigelM

    NigelM Recovering Member

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    I wonder if there's something in the firmware or algorithms that stops us getting much higher in Range mode? I've had est/ideal 252/248 one time, but I don't range charge very often and when I do it's usually for a trip on the Interstate.
     
  5. VolkerP

    VolkerP EU Model S P-37

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    Daniel, did you get a new firmware with the Ranger visit? If yes, is it possible that this firmware version no longer "forgets" your driving when you charge the car?
     
  6. NigelM

    NigelM Recovering Member

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    :confused: It never has "forgotten"...at least in the 2.5.
     
  7. Mitrovic

    Mitrovic Member

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    It happens rather often to me:

    16835777.jpg
     
  8. daniel

    daniel Active Member

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    I did get a new firmware version. But it's never forgotten my past driving before, as shown by the fact that after charging, my estimated range was always less than my ideal range.

    The biggest difference is that we've finally gotten nice weather and the heater's been off. And I don't use A/C because in hot weather I take the top off. But I have no idea if the firmware is doing anything differently.
     
  9. mgemmell

    mgemmell Scottish chap

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    Madrid, Spain
    Yeah, you Swiss guys come down from the top of the mountains and get the craziest estimated range figures (and that's 584kms with a 70% charge!). Must be scary when you go up though?
     
  10. Mitrovic

    Mitrovic Member

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    If you are careful, its not that bad!

    But you really can upset the computer when driving for a long period downhill!
     
  11. dwegmull

    dwegmull 2013 Model S 85

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    Redwood City, California
    In my experience, I can achieve parity between the two readings by driving at a constant 55MPH.
    If I keep my energy consumption below that, the estimated range will be greater than the ideal range (by 5 to 10 miles). This happens on days when I drive only on local streets with 35MPH speed limits and few quick accelerations.
    My regular commute includes a mix of highway (65MPH) and local roads, moderate changes of altitude and several traffic lights on roads with speeds around 50MPH. Under these conditions, my estimated range is shorter than ideal by 10 to 20 miles.
     
  12. TEG

    TEG TMC Moderator

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    A little 'trick' someone recently told me:
    At the start of a long trip, set the trip meter to 0.
    Then watch the miles add up on the trip meter, as the estimated miles remaining goes down.
    Add them together mentally and compare the trend of difference between that sum and the original projected miles when you started.
    If you are quick with addition and comparison you can calculate on the fly how your driving style is affecting your range better than the vehicle's own guess.
    You are also armed with additional knowledge about the type of terrain and driving conditions you are likely to encounter in the near future.
     
  13. wycolo

    wycolo Active Member

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    Isn't that more or less what the 'range est' meter (under the speedo) is trying to do? That is the only one I can see anyway: remove prescription sunglasses, lean foreward, try to focus. Given ~10 miles or so of normal driving, it seems to recalibrate and when you end your trip it is right in line with the TS guage.
    --
     
  14. slcasner

    slcasner Member

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    Yes, TEG, we've been using that technique for many years in the EV1, RAV4-EV and now the Roadster.
     

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