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 or making a Paypal contribution here: paypal.me/SupportTMC

P85D trip SF-Portland: detailed data on range and charging

Discussion in 'Model S: Battery & Charging' started by MarcG, Dec 25, 2014.

  1. MarcG

    MarcG Active Member

    Joined:
    Oct 29, 2014
    Messages:
    1,666
    Location:
    San Francisco
    #1 MarcG, Dec 25, 2014
    Last edited: Dec 26, 2014
    Merry Christmas everyone!

    Today I took my first long trip in the P85D from San Francisco to Portland.
    The goal of this thread is to dissect the detailed data I gathered on each driving leg and charging session in order to analyze the P85D real-world range.

    First, a few common points to all the data points collected:

    1. Software version was updated to v6.0 (2.0.81) just before the trip started
    2. The trip started with 100% charge showing 252 Rated Miles (RM)
    3. I have the base 19" wheels with Michelin Primacy tires
    4. My P85D has a sunroof that was fully-closed the whole trip
    5. No roof rack was installed on the sunroof during the trip, although I did bring it for later
    6. Payload was about 500 lbs (two adults, ski/snowboard gear, etc.)
    7. Average speeds are recorded below based on distance traveled divided by driving time
    8. The goal was to stay at 10 mph over the speed limit (which varied a bunch) using cruise control
    9. My girlfriend drove the last sting and she didn't use cruise control (and drove slightly slower than me)
    10. No other stops were made besides supercharing
    11. Net elevation difference is in feet

    With all that out of the way, here is finally the promised data!

    FromToMilesDepartArriveAvg mphAvg tempRM usedkWh usedWh/miNet elev ≠WeatherHeating
    San FranciscoCorning SC 172.39:0911:3172.8012ºC/54ºF25074.643326Dry/sunnyNone
    Corning SCMt Shasta SC108.712:221:4974.9711ºC/52ºF17652.44823218Dry/sunny21ºC/70ºF
    Mt Shasta SCGrants Pass SC118.62:264:0571.884ºC/39ºF14944.3373-2401Wet/Snow/Rain21ºC/70ºF
    Grants Pass SCSpringfield SC140.15:137:0972.477ºC/45ºF19257.2408-666Dry/dark21ºC/70ºF
    Springfield SCPortland108.77:419:1570.217ºC/45ºF13640.6374-197Dry/dark21ºC/70ºF






    And here are the charging stats:

    SuperchargerRM startRM endRM chgEnergyChg timeChg rateTemperature
    Corning2 (1%)202 (90%)20059.56 kWh0:4972.93 kW13ºC/55ºF
    Mt Shasta26 (10%)177 (70%)15144.88 kWh0:3576.94 kW9ºC/49ºF
    Grants Pass28 (11%)240 (95%)21263.26 kWh1:0657.51 kW6ºC/43ºF
    Springfield48 (19%)175 (69%)12737.90 kWh0:3075.79 kW11ºC/52ºF





    Some interesting findings:

    A) Charging to 100% yielded slightly over 250 RM, so I based my SOC % calculations on 252
    B) The four trips all indicate that the useable energy is 75.2 kWh
    C) Overall consumption seems to be around 400 Wh/mi on average
    D) Charging until around 50% emits a loud fan noise under the frunk (cooling the battery?)


    There you go, hope this helps!
    Now, feel free to discuss away :biggrin:

    -Marc
     
  2. Vger

    Vger Active Member

    Joined:
    Apr 10, 2009
    Messages:
    1,683
    Location:
    Salt Spring Island, BC, Canada
    I just did that drive myself a few days ago in my Sig P85. I do not have a detailed log, but I recall that while I drove slightly slower (probably averaged 70 mph), more than 50% was in rain, and I averaged about 320 Wh/mi.

    Hmmm, it does seem that the P85D is significantly less efficient still at this point.

    I dare say, it was a bit risky of you to skip the Vacaville SC and run the car all the way down to 2 RM. The battery calibration can vary. Mine was recently out of whack and I experienced a full shutdown at 2 RM. That is another story to be posted soon...
     
  3. Burt Court

    Burt Court Member

    Joined:
    Feb 21, 2014
    Messages:
    106
    Location:
    Southern California
    You charge quickly, eat slowly (if that's why your stops were so long). My kids now have my S-85, my D comes in next week. Look forward to same kind of trip more southernly.
    old geezer
     
  4. jweinstein

    jweinstein Member

    Joined:
    Feb 11, 2013
    Messages:
    177
    Location:
    Anchorage, AK
    Thanks, Marc!

    Does the usable 75.2 kWh include any hidden miles below zero, or is that still a mystery?

    I keep going back to this chart/hypothesis:

    8b6768320e1b6a76f85f712df654dbd2.jpg

    -Josh
     
  5. MarcG

    MarcG Active Member

    Joined:
    Oct 29, 2014
    Messages:
    1,666
    Location:
    San Francisco
    Good to know, thanks! Curious to hear about your 2 RM shutdown at some point.

    As for the point about risking the Vacaville skip, I kept a close eye on projected range vs remaining miles from the very beginning of my 80 mph run.
    i figured that it would be easy to adjust down to 75, 70, or even 65 mph if I got too close. Didn't need to in the end :)

    - - - Updated - - -

    Well, besides the Grants Pass where we actually ordered a meal, all the other stops were just made long enough to charge to a level where I was comfortable knowing we'd make it to the next supercharger while driving 10 mph over the speed limit.

    - - - Updated - - -

    I think it's still a mystery. I'd like to know the origins of this chart and how it applies to the P85D, if at all.
     
  6. tom66

    tom66 Member

    Joined:
    Dec 17, 2013
    Messages:
    622
    Location:
    United Kingdom
    #6 tom66, Dec 26, 2014
    Last edited: Dec 26, 2014
    I'm not sure that graph is correct.

    ~76kWh is the usable capacity.

    ~80kWh is the design capacity. This is the maximum discharge point, at which the contactors will probably disengage to protect the pack. Or it's the point at which Tesla declare the pack beyond repair if it's been deep discharged.

    ~85kWh is the capacity when using the raw Ah figure x 3.7V x number of cells. Purely theoretical.

    Zero mile figure is hidden by elevating Wh/mile. So the 265 mile range for S85 includes the zero mile protection, but the internal Wh per mile is set slightly lower so that if you go at the rated Wh/mile you will hit zero miles after travelling ~250 miles, at that point the pack is nearly fully discharged and is likely to stop driving the car shortly.
     
  7. Burt Court

    Burt Court Member

    Joined:
    Feb 21, 2014
    Messages:
    106
    Location:
    Southern California
    Sorry Marc, I was mixing up arrive and depart times in the upper chart. Will learn how to do this soon, I hope.
    old geezer
     
  8. WarrenInCA

    WarrenInCA Member

    Joined:
    Oct 4, 2014
    Messages:
    86
    Location:
    Scotts Valley, CA
    Hey Marc, where are you skiing?
     
  9. MarcG

    MarcG Active Member

    Joined:
    Oct 29, 2014
    Messages:
    1,666
    Location:
    San Francisco
    Mt Hood and Mt Bachelor!
     
  10. MarcG

    MarcG Active Member

    Joined:
    Oct 29, 2014
    Messages:
    1,666
    Location:
    San Francisco
    Happy new year everyone!

    I'm back in SF and have more data to share:

    FromToMilesDepartArriveAvg mphAvg tempRM usedkWh usedWh/miNet elev ≠WeatherHeating
    PortlandDetroit Lake56.22:293:3551.14ºC/39ºF9127.04801,289Wet/Rain21ºC/70ºF
    Detroit LakeBend78.64:165:5348.61ºC/34ºF12537.54771,922Wet/Snow21ºC/70ºF
    BendKlamath Falls136.09:2912:0153.7-12ºC/10ºF16749.7365613Snow/Sunny21ºC/70ºF
    Klamath FallsMount Shasta84.91:152:3563.7-3ºC/27ºF10430.5359-640Wet/Sunny21ºC/70ºF
    Mount ShastaCorning109.13:154:4374.45ºC/41ºF12135.3323-3,218Dry/Sunny21ºC/70ºF
    CorningVacaville113.75:186:5173.48ºC/46ºF14643.7384-177Dry/Dark21ºC/70ºF
    VacavilleSan Francisco58.17:308:2168.311ºC/52ºF7221.5370151Dry/Dark21ºC/70ºF
    It got really cold in Bend the last 2 days we were there... great for the snow though!

    And here are the charging stats:

    SuperchargerRM startRM endRM chgEnergyChg timeChg rateTemperature
    Detroit Lake10 (4%)189 (75%)17953.23 kWh0:3981.89 kW2ºC/36ºF
    Mt Shasta12 (5%)179 (71%)16748.98 kWh0:3877.33 kW0ºC/32ºF
    Corning58 (23%)187 (74%)12937.83 kWh0:3270.93 kW9ºC/48ºF
    Vacaville41 (16%)186 (74%)14542.52 kWh0:3572.90 kW12ºC/54ºF
     
  11. kennedyseattle

    Joined:
    Dec 15, 2014
    Messages:
    9
    Location:
    Seattle, WA
    Thanks Marc for posting this data. Did you also charge up in Bend and/or Klamath Falls? If so could you share details? Thank you!
     
  12. MarcG

    MarcG Active Member

    Joined:
    Oct 29, 2014
    Messages:
    1,666
    Location:
    San Francisco
    Yep I charged several times in Bend using the Tesla HPWC at the hotel we were staying at. I didn't record those charging events but remember I got at most just under 17kW (208V x 80A) of charge rate.

    As for Klamath Falls, I stopped at an RV park and used one of their NEMA 14-50 plugs. I charged for 1 hr 7 min at an average rate of 8.26 kW, so I got a total of 9.23 kWh (31 rated miles). The ambient temperature was -4ºC / 25ºF.
     
  13. stevezzzz

    stevezzzz R;SigS;P85D;SigX

    Joined:
    Nov 13, 2009
    Messages:
    6,062
    Location:
    Colorado
    Even with descending 3200' over 109 miles I see you didn't manage to achieve Rated range: we really need Normal mode!
     
  14. MarcG

    MarcG Active Member

    Joined:
    Oct 29, 2014
    Messages:
    1,666
    Location:
    San Francisco
    Yep, Normal mode / torque sleep mode can't come soon enough. Although, I wonder what ambient temperature rated miles are based on (in my case it was still pretty cold, just over freezing).
     
  15. DrGuest

    DrGuest Member

    Joined:
    Nov 20, 2013
    Messages:
    406
    Location:
    Bozeman, MT
    Off Topic - Let me know if you ever come to Big Sky or Bridger Bowl in Montana, I can show ya around. We got 19 inches Yesterday at Bridger, they call our Powder snow, the Cold Smoke! Good quality light stellar dendrites!
     
  16. Zextraterrestrial

    Joined:
    Mar 11, 2010
    Messages:
    3,636
    Location:
    Humboldt/Los Altos
    #16 Zextraterrestrial, Jan 5, 2015
    Last edited: Jan 5, 2015
    :love: jealous


    (I am planning on Bachelor the first week of February, hopefully it's cold)
     
  17. MarcG

    MarcG Active Member

    Joined:
    Oct 29, 2014
    Messages:
    1,666
    Location:
    San Francisco
    Definitely jealous as well!!

    I'd like to first try the drive out to SLC if/when they ever put the superchargers on 80 in Nevada.

    Then maybe a trip to Montana from there is possible :)
     

Share This Page