TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

First trip - S100D

Discussion in 'Model S' started by brkaus, Apr 22, 2017.

  1. brkaus

    brkaus Active Member

    Joined:
    Jul 8, 2014
    Messages:
    1,797
    Took first road trip yesterday.

    Car worked great. Comfortable and lots of room for stuff.

    Tire pressure set to 45 psi cold.

    Starting charge at 100%. Said 345 rated miles. Excellent! Charged for 90 to 100 times to unplug right when we had to leave.

    Drove 90 miles. Finish rated miles was 227. 118 rated miles used.


    Trip consumption was constantly falling below prediction.

    Ran speed limit +5 entire way. Mostly in TACC

    Figured it was the speed. But evtripplanner says I should have used 86 rated miles. I put in 1.1 speed in evtripplanner. And I selected a P100D which should be worse?

    See attached ev trip planner output.

    What is realistic? I was hoping I could do this round trip with no charging. Including a bit of driving around for the weekend. Looks like at minimum I'm going to have to find a supercharger in the way home.
     

    Attached Files:

  2. McRat

    McRat Active Member

    Joined:
    Jan 20, 2016
    Messages:
    3,552
    Location:
    Norco, CA
    5 mph will make a significant difference starting at about 55. As you go faster, that 5 mph makes a bigger and bigger difference.

    The beauty of having a big battery is you can drive fast and still have enough range. Smaller batteries often have to worry about their speed.
     
  3. KJD

    KJD Supporting Member

    Joined:
    Dec 14, 2013
    Messages:
    781
    Location:
    SLC, UT
    Please state what your speed was in MPH. Different roads have different speed limits and it makes a big difference.

    In my 2012 if I set the cruise at 65 mph I can match or beat rated miles. Anything over 70 mph and I will get less than rated miles.
     
  4. Derek Kessler

    Derek Kessler Member

    Joined:
    Apr 15, 2016
    Messages:
    279
    Location:
    Cincinnati
    Weather will also have a noticable impact - colder temps, rain, headwinds all increase energy usage and hurt range.
     
  5. JHWJR

    JHWJR Member

    Joined:
    Jan 31, 2017
    Messages:
    306
    Location:
    Pittsburgh PA
    And if the speed limit is 65 and you go 55, you can go for a very long way, well beyond rated.
     
  6. brkaus

    brkaus Active Member

    Joined:
    Jul 8, 2014
    Messages:
    1,797
    65-75. Never above 75.

    Evtripplanner says 110rm at 1.5 speed.

    I'll look at the legs later and see what it expects for average.
     
  7. nagypite

    nagypite Member

    Joined:
    Sep 11, 2016
    Messages:
    148
    Location:
    EU
    19" or 21" wheels?
     
  8. Haxster

    Haxster Member

    Joined:
    Apr 4, 2016
    Messages:
    516
    Location:
    Silicon Valley
    And going 45 is even better!

    Just be sure to either crack up the stereo or wear earplugs so you're not bothered by all the honking.
     
    • Funny x 7
    • Like x 2
  9. brkaus

    brkaus Active Member

    Joined:
    Jul 8, 2014
    Messages:
    1,797
    19" wheels.
     
  10. brkaus

    brkaus Active Member

    Joined:
    Jul 8, 2014
    Messages:
    1,797
    So, I guess my questions -

    Can I use evtripplanner for realistic planning?

    Is there something wrong with the car (I think it sounds louder than my friends s75d)?

    Do I need to drive 45 :)
     
  11. chillaban

    chillaban Active Member

    Joined:
    May 5, 2016
    Messages:
    1,630
    Location:
    Bay Area
    I don't always find EVTripPlanner accurate. The one in the car seems far more realistic and adapts dynamically -- it's too bad tesla doesn't make that one available to use outside the car. EVTP used to feel better but lately I find it's always optimistic and sometimes plans nonsensical supercharger stops involving unnecessary backtracking.

    I just did a 300 mile trip to Tahoe in a S100D, charged once for 10 minutes. The charging time was spot on, and I arrived with 20%, originally projected 19%, and I drove up to 80mph following traffic flow too.

    In my S70D I've taken this trip many times and it involves 40 minutes of charging and carefully staying pinned down at the speed limit.
     
    • Informative x 1
    • Like x 1
  12. ACExpress

    ACExpress Member

    Joined:
    Jan 10, 2017
    Messages:
    76
    Location:
    Dallas, TX
    Was there much traffic or elevation change within the trip (I saw net was only 62 ft) even if you were around the speed limit the entire time? I've found I can drive more efficiently than TACC on hills and in some traffic based on not needing to get to a certain speed at the earliest opportunity.

    In addition, a recent 90 mile trip I took in my 60D was fairly flat and used somewhere in the same neighborhood of 118 rated miles. It turns out I was driving into a 20-30 mph headwind. What was your average wh/mi on the trip?
     
  13. brkaus

    brkaus Active Member

    Joined:
    Jul 8, 2014
    Messages:
    1,797
    Through the Texas "hill country". Quite a bit of up and down.

    Abetterrouteplanner.com/beta shows using 34% of the battery. Which I believe is pretty close.
     
  14. bob_p

    bob_p Active Member

    Joined:
    Apr 5, 2012
    Messages:
    1,552
    We've found our S 100D gets pretty close to the onboard Trip Planner's range prediction, much better than with our S P85.

    When driving at typical highway speeds (posted speed limit plus 5), with our S P85, the consumed range would typically be 30% more than the distance (i.e., on a 100 mile trip, we would use 130 miles of rated range).

    With our S 100D, it looks like we're getting closer to 20% (120 miles of rated range for 100 miles), and combined with the increased range with the 100 battery pack - the range difference between our S P85 and S 100D is considerable - closer to 100 miles of distance on a charge!
     
  15. BerTX

    BerTX Active Member

    Joined:
    May 2, 2014
    Messages:
    1,677
    Location:
    Texas/Washington
    EVTP doesn't use speed limits on roads, it uses Google average speed data. Often this is way off from reality. For instance, on I-10 in West Texas, it uses 72 mph as the speed calculation, where the speed limit is 80.
     
  16. tpham07

    tpham07 Member

    Joined:
    Mar 21, 2017
    Messages:
    459
    Location:
    Baton Rouge
    I did a sample trip on EVTP using a S75 and a S90D and for some reason it said the trip time on the 90D would be longer :| haha
     
  17. commasign

    commasign Active Member

    Joined:
    Aug 31, 2013
    Messages:
    1,194
    Location:
    Davis, CA
    Weather and age of tires. If it's cold outside and/or tires are new, energy consumption will increase and range will decrease.
     
    • Like x 1
  18. brkaus

    brkaus Active Member

    Joined:
    Jul 8, 2014
    Messages:
    1,797
    Thanks for all the data points!

    I did easily make the trip to San Antonio, drive around there for two days, and made it back to the San Marcos supercharger. I think I could have made it home to Austin, but the onboard trip planner suggested to stop and I really wanted to try a supercharger!

    AP2.0 did a good job on the highway and dealing with the stop and go interstate traffic. One minute 70mph, next minute 25mph. Rested my left arm on the door and fingers loose around the wheel. Asked me to hold wheel 2-3 times in 45 miles.

    Overall good trip. And good learning experience.
     
    • Like x 1
  19. brkaus

    brkaus Active Member

    Joined:
    Jul 8, 2014
    Messages:
    1,797
    Btw - was supercharging at 112kW up to about 65%. Then it reduced to 107kW. Not sure if because of heat or SOC. Pretty impressive I thought.

    I then unplugged to chase the family down so they didn't spend too much at the outlet mall.

    AC system sounded like a jet for part of the charging and at least 5 minutes after.
     
  20. doofenshmirtz

    doofenshmirtz Member

    Joined:
    Feb 1, 2016
    Messages:
    66
    Location:
    United States
    ac seems to do that after a long drive followed immediately with supercharging. took me by surprise the first time. stopping the supercharging for a few minutes seemed to have a positive effect (the ac whine went away)
     

Share This Page