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Glenwood Springs to Silverthorne pulling trailer

Discussion in 'Model X: Battery & Charging' started by idoco, Jul 8, 2017.

  1. idoco

    idoco Member

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    Anyone have experience with this route using a MX 90D pulling a trailer?

    Based on EVTripPlanner it's 94 actual miles using 232 rated miles and 71kWh (based on 590Wh/mi for vehicle/trailer on flat terrain). That leaves an approximately 25 mile rated range reserve or an actual range reserve of 10 miles. Which is cutting it a little close. Wondering if I should stop at Vail and "top off" with one of the J1772 or HPWC in Vail?
     
  2. scottf200

    scottf200 Active Member

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    #2 scottf200, Jul 8, 2017
    Last edited: Jul 8, 2017
    I've never done it but looking at the elevation from one site you are going downhill a lot so it seems like you would be fine. Did you verify the elevation changes as well?

    [update]Sorry my elevation below is backward. Silverthorne to Glenwood Springs [/update]

    [​IMG]
     
  3. idoco

    idoco Member

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    From EVTripPlanner Glenwood Springs to Silverthorne
    elevation.jpg
    As comparison this is from Silverthorne (near Vail/Breckenridge) to Denver. A definite downhill from my memories of driving from Vail to Denver.
    elev2.jpg
     
  4. idoco

    idoco Member

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    And from Google Maps
    elev3.jpg
     
  5. wycolo

    wycolo Active Member

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    You have that chart backwards - from Glenwood Sprgs (6200ft) you climb up and over Vail Pass and then down to Silverthorne (9570ft) so a net climb of some 3370 ft. Just to clarify.
    --
     
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  6. idoco

    idoco Member

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  7. ohmman

    ohmman Maximum Plaid Member

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    I'm mobile right now but what is the mileage and elevation gain to the crest? That's the only part that needs to concern you.
     
  8. ohmman

    ohmman Maximum Plaid Member

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    As a point of reference, I consumed 36.0 kWh climbing 5000 feet over 23.8 miles.

    Going an additional 70 miles at your 590Wh/mi would be 41.3kWh, totaling about 77-78kWh.

    Note that I went slowly on my route as it had speed limits in the 35-45 mph range. You may have a different plan.
     
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  9. idoco

    idoco Member

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    Via EV trip planner (using vehicle configured for 590 Wh/mi on flat ground)
    Glennwood Springs SC to Silverthorne SC
    time1:34
    actual miles 94
    rated miles 233
    kWh used 70.9
    avg Wh/mi 764
    up feet 13842
    down feet 10909
    net elev change 2933
     
  10. idoco

    idoco Member

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    Very helpful. Thanks.

    Your average consumption appears to be ~1500kWh/mi on an average 4% grade.
    Did find one post from @jackbowers where average consumption was ~800kWh/mi on an average 1.5% grade.

    (78 actual miles, 190 rated miles, ~63kWh, 5600 feet climb)
    Camping Trailer Selection for Model X

    So my climb is an average 0.6% grade. Base on Jack's data of 78 miles on a 1.5% grade, 94 miles on a .6% grade seems reasonable.
     
  11. idoco

    idoco Member

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    I found a few more of Jack's trip posts with his Bowlus. Using his elevation gains and rated mileage tests, along with his flat numbers, I configured a custom vehicle in EVTripPlanner. This seems to approximate his numbers under multiple scenarios.

    Using the new model I get a flat consumption of ~520Wh/mi. Little more than Jack's 475 but works very nicely as base for elevation changes.

    New #'s:
    Distance 93.8 miles
    Total Energy Used 63.6 kWh
    Rated miles 191
    Average Efficiency 678 Wh/mile
    Net Elevation Change 2932 feet

    So that seems better with a greater margin for weather conditions.

    Thanks everyone who contributed to the discussion.
     
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  12. TallPaulS

    TallPaulS Member

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    You can probably play this by ear. Vail Pass is your big eater; if you reach Vail (which going East will be before the big climb) with >= expected you should be fine. It's all about making it to the top of Vail Pass, the 20 or so miles (as memory serves) after that will be a net gain for you.
     
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