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I Ran My MXP90D Down to 0%!! (or negative?)

Discussion in 'Model X' started by Peteybabes, Jul 10, 2017.

?

Has Anybody Run This Low? (0%)

  1. Yes

    10 vote(s)
    29.4%
  2. No

    24 vote(s)
    70.6%
  1. Peteybabes

    Peteybabes redneck drivin' a tesla...

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    With the help of www.evtripping.com I planned my route from Columbus OH to Lebanon IN and only allowed for a 5% buffer in my settings/preferences on their route planner, (not for the faint of heart!). The following video shows how it went when I left Columbus with 100% SOC...

     
    • Informative x 1
  2. gavine

    gavine Petrol Head turned EV Enthusiast

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    How long did it take for the charging to ramp-up? Apparently, when it's that low, it doesn't start charging at full power right away?
     
  3. bcampbelllds

    bcampbelllds Member

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    North Dallas, Texas
    Our long road trip last month from TX to OH was great in our 100D. The range estimator was always off by 8%-10%. We drove 5-8 over the posted speed limit. Always charged for an extra 5-10 minutes because of this.
     
  4. Peteybabes

    Peteybabes redneck drivin' a tesla...

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    You are right! :) it went to 50KW and after 5 minutes slowly ramped up to 75KW then at 10 minutes went to 104KW where it charged for 10-15 minutes and started reducing back down again...
     
  5. bhuwan

    bhuwan Active Member

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    How many miles did you get?

    remember, 0% means 0%!!!!
     
  6. Peteybabes

    Peteybabes redneck drivin' a tesla...

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    I've found that the Tesla software is extremely conservative and it will yell at you to not go over 55mph or it may even say "charging required to reach your destination" but i kept it steady at 75mph...until the last 10 miles or so cuz i did have a bit of anxiety. lol
     
  7. Peteybabes

    Peteybabes redneck drivin' a tesla...

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    How do you mean? How far was I able to go from point A to point B?
     
  8. Peteybabes

    Peteybabes redneck drivin' a tesla...

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    I went 182 miles in 2 hours and 30 minutes...
     
  9. Tam

    Tam Active Member

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    Did you start with about 257 rated miles.

    So based on this experience, won't you need about 75 extra rated miles (on top of 257 = 332) to start with?
     
  10. MasterT

    MasterT Member

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    Why? Why do you add 75 miles (257-182) back to 257? What are you trying to calculate?
     
  11. Sandiegodoug

    Sandiegodoug Member

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    SAN Diego
    I was at San Diego supercharger yesterday and saw one delivered on the back of a tow truck. He said went to 0 and he kept going
    Then car said to go 35mph. He came up 1 mile short. To get supercharger to work
    AAA driver had to connect a jumper to front battery.
     
  12. Tam

    Tam Active Member

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    #12 Tam, Jul 10, 2017
    Last edited: Jul 10, 2017
    Let's plan this trip again.

    This trip has a distance of 182 miles.

    And the battery gauge says 257 rated miles.

    Based on the past trip, 257 rated miles spares me 0 miles.

    So, I will need to charge up my battery to a minimum of 257 existing rated miles +75 EXTRA miles = 332 rated miles.

    Again, My battery gauge needs to display 332 rated miles minimally before I would duplicate the past trip of 182 actual miles.

    The extra 75 rated miles is due to speed, wind, elevation, weather, driving style.

    -----------Addendum---

    Sorry. I think I got your point.

    257 rated miles will cover 182 actual miles with 0 miles left so there's no need to add any numbers to duplicate this trip.

    However, I guess, to be able to maintain speed without slowing down in the end during the last trip, it is better to have some extra miles.

    So I won't start my trip with 257 rated miles but I would charge up extra miles more than that number for comfort and avoiding slowing down.
     
  13. Peteybabes

    Peteybabes redneck drivin' a tesla...

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    I'm a P90D so i started with 250 miles...

    the reason why i only went 182 miles is because of several reasons, 22 wheels which take off about 25 miles of range right away, i was going 5mph over (75) which is also 10mph over what Tesla rates their range at...(rated range is based on 65MPH right??) and I also had pretty bad headwind heading due west with power usage as high as 500wh/mile at times...!
     
  14. Peteybabes

    Peteybabes redneck drivin' a tesla...

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    ouch, that sux. i was probably 10 minutes away from being too dead to go any further...however if the supercharger would have been further than that I would have pulled up my plugshare app and tried to find a chademo charger...
     
  15. TexasEV

    TexasEV Well-Known Member

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    No. Rated range means range on the EPA test cycle.
    You got lucky this time, as the displayed rated range (or battery percentage) is just an estimate. Your battery may not be as lucky-- it doesn't like being discharged this low. You're really better off slowing down.
     
    • Like x 1
  16. Tam

    Tam Active Member

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    Slowing down could also mean speeding fast but please stop by Dayton Supercharger for extra charge before heading to the destination.
     
  17. TessieX

    TessieX Member

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    Location:
    Arizona
    I'm trying to decide whether or not to try a 208 mile stretch (with no supercharger along the way) in my P100D... I've been really worried about the trip (one that runs from AZ to CO). We mapped it all out (it's a regular trip of ours) and saw that the range seemed plausible (with 2 other superchargers along the way) before we purchased the X. But after my first road trip (on the day the X was delivered) from AZ to CA... I realized that the range isn't really the RANGE. it changes based on all the other factors involved in the equation. So that last stretch with no supercharger was giving me all the worries...
    But this eases my mind a little.
    There is a detour (30 minutes out of our way) to reach another supercharger... if we just don't want to risk it. But we'd have to decide about half way through our last stretch of the trip. Range anxiety is truly a REAL thing.

    5 people and baggage in the X will be another factor!
     
  18. Peteybabes

    Peteybabes redneck drivin' a tesla...

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    good point, i had 4 people weighing a total weight of about 950-1000lbs. (yep some big guys)

    But I think you should be fine with a 208 mile stretch...just keep yourself at a steady speed and slow down as needed.

    www.evtripping.com will allow you to add wheel size and total additional weight, etc...use it.
     
  19. voltaren

    voltaren Member

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    Annapolis, MD
    Amateur... drove a P90D to -15 miles... :) you can sort of tell how much you have left as the power output gets less and less...

    IMG_1673.JPG
     
  20. Peteybabes

    Peteybabes redneck drivin' a tesla...

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    i think i mentioned in the video description or something that my power had been reduced to around 85kw. :D
     

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