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loosing serious range with AC on at 75mph

Discussion in 'Model X: Battery & Charging' started by Cwsnhri, Jun 18, 2016.

  1. Cwsnhri

    Cwsnhri Member

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    Location:
    Santa Barbara, Ca
    Charging to 235 but with above and leaving 35 available I get maybe 150.....thoughts?
     
  2. KJD

    KJD Member

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    What is the outside air temp during that run ?

    What is the wind speed and direction ? (Headwind maybe?)

    How much uphill on that route ?

    Try doing the same route at 65 mph and see what the result is.
     
  3. Cwsnhri

    Cwsnhri Member

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    Location:
    Santa Barbara, Ca
    Air temp is 75
    wind is soft
    one large ( 2 mi) uphill
     
  4. L-P-G

    L-P-G Member

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    Orlando, FL
    There is your problem, what's your kWh/mi?
     
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  5. Johan

    Johan Took a TSLA bear test. Came back negative.

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    Exactly. AC use has not been seen as significant which is because going uphill at 75 mph is a much more energy intensive thing than the AC could ever be, and is sustained for 2 miles.
     
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  6. purplewalt

    purplewalt Active Member

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    Try slowing down to speed below 70mph.
    Going 75 mph uphill is the cause of the power loss, not the AC.
     
    • Like x 1
  7. roblab

    roblab Active Member

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    And it's not the miles going uphill, but the elevation change. You calculate ten miles drain for every thousand foot gain (hey, it rhymes!). I gain a thousand feet in two miles going up to my house every day. Your quoted wind speed of "mild" means?? 10 mph of wind is the same as 10 more mph drag. And the range already drops 25% when driving 75 over 65. So, yeah, I believe your range is down to 150.

    I would recommend watching Trips and slowing down. Unless you're not worried and are going less than 150 miles.
     
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  8. loganintx

    loganintx Member

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    Austin, TX
    Just use the energy app, set it to the smallest increment of 5miles and check your average before you get to the hill, after you get tot he top of the hill and then beyond. The car has a LOT of ways to show you average energy use:
    1. Since the last time you charged
    2. Since the last time you started driving
    3. Last 5 miles, 15 miles, 30 miles
    4. Trip odometer A and B
     
  9. mikegre

    mikegre Member

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    Florida, Vermont and New York.
    What size tires do you have? The larger ones can cost you 10-15% in mileage.
     
  10. S'toon

    S'toon Knows where his towel is

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    • Like x 3
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  11. FarmerDave

    FarmerDave Member

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    Not among the ten words listed but frequently seen on the forum:

    Breaking ==> failing, coming apart.

    Braking ==> slowing or stopping using a vehicle's brakes.
     
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