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The 310 Mile (LR) Model 3 EPA Reported Energy Efficiency

Discussion in 'Model 3' started by SageBrush, Aug 6, 2017.

  1. SageBrush

    SageBrush Active Member

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    @omgwtfbyobbq found the most comprehensive performance data on the LR Model 3 to date, and also provided equivalent specs for the Bolt. I posted in his thread some of the conclusions that the data and report allow, but decided to repost here for more visibility since it is such important information to many of us and might be missed by readers who try to avoid EPA'ese.

    Highlights:
    1. 89 kWh to fill the battery from empty to full from the wall
    2. Apparently 12.5% charging losses with the EPA EVSE, so 78 kWh usable
    The data includes roll down coefficients meant to model loads from fixed power drain, road, drivetrain, and aero. That EPA model is graphed below. Keep in mind that it would not accurately reflect on-road consumption if wind and/or accessory loads like A/C or heating are used.

    [​IMG]

    Enjoy!
     
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  2. gaswalla

    gaswalla P4201/85/airsusp/pano/19i

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    Wow... Battery sounds like an 80 with some reserved to avoid bricking. And 200 wh/mi at 65mph. All very impressive. Is this actual measures or theoretical?
     
  3. Zythryn

    Zythryn MS 70D, MX 90D

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    I think we are missing something here. I don't believe the battery is that large.
    Earlier this year, didn't Elon say the larger pack would max out at 75kWh?
     
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  4. SageBrush

    SageBrush Active Member

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    Roll down data is measured, and fit to a polynomial.
     
  5. McRat

    McRat Active Member

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    10 miles per kWh at 30mph. You sure on that one? The M310 will go 785 miles on a charge? And a Bolt will go 585 miles?

    Sorry... Ain't buying it until I see it. Maybe 7-8 miles per kWh, but 10 is not 8 or even close.

    I'm not even convinced yet that Hyundai didn't stretch the truth with the Ioniq yet. But only because of the number of times they been punished for exaggerating.
     
  6. stopcrazypp

    stopcrazypp Well-Known Member

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    Another data point I would add is that it specs battery voltage at 350V and capacity at 230, which works out to 80.5kWh nominal.
     
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  7. stopcrazypp

    stopcrazypp Well-Known Member

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    At a low steady speed you will be surprised at what is possible. The S P100D gets 315 miles EPA, but someone just set a new world record with 670 miles of range on it:
    New 670-Mile Tesla Range Record Set
     
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  8. McRat

    McRat Active Member

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    We will see.

    10 mi/kWh is 1000 miles in a 100D.
     
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  9. stopcrazypp

    stopcrazypp Well-Known Member

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    Given the huge weight difference, obviously a 100D will never achieve even close. At low speeds, rolling resistance plays a big role.
     
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  10. KarenRei

    KarenRei KarenRei KarenRei KarenRei KarenRei KarenRei

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    As I asked in the other thread, is this wall to wheels or pack to wheels?

    Also, it might be useful to compare to other Tesla vehicles, not just / instead of the Bolt. :)
     
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  11. SageBrush

    SageBrush Active Member

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    It is power at steady state speed, expressed as Wh/mile. The Power polynomial was derived from roll down data. You may find the derivation informative -- I barely understand it, and was content for this thread to just plug the equation into a spreadsheet.
     
  12. McRat

    McRat Active Member

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    It will be very cool if that graph is correct. 346 miles at 75 mph.
     
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  13. Reciprocity

    Reciprocity Active Member

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    Actually makes sense if you don't stop and are on a straight level road. S100D just did >1000km at around 30mph.
     
  14. Thomas Edison

    Thomas Edison Member

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    Where are the first 30 owners to verify this. Road trip people, for science!
     
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  15. shrspeedblade

    shrspeedblade Member

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    I'm very skeptical that it will manage 6 miles/kwh, on any realistic basis as I know what that takes in my Volt.

    It will do 310 miles on a charge, that's superb, let's not start boosting expectations into the stratosphere again as it does no one any good.
     
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  16. gaswalla

    gaswalla P4201/85/airsusp/pano/19i

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    That is not what it says. (Nor would it make any sense for the range to increase while you drive faster).
    The y axis is watthr / mile...ie how many watthrs the car uses per mile driven on a flat surface. So, if you are reading 345 watthr at 75mph, then the range would be 78,000/345 (usable energy is reported at 78kilo watt hrs)
     
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  17. gaswalla

    gaswalla P4201/85/airsusp/pano/19i

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    6 miles per kwh if you drive under 45 mph on a flat road...it's possible
     
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  18. SageBrush

    SageBrush Active Member

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    Exactly.

    But keep in mind that roll down data excludes some losses present on the road, so as a WAG I'd take off 10% from the range calculated ffrom the graph.
     
  19. shrspeedblade

    shrspeedblade Member

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    I know it's possible, I've done it, and not under quite so ideal conditions either.

    I just don't see a 3800+lb car with fairly wide tires doing it except under perfect conditions, which isn't the reality of daily use. This is the just the kind of speculation that gets out of hand on this forum, that's all.
     
  20. gaswalla

    gaswalla P4201/85/airsusp/pano/19i

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    Folks just did better than 6 miles per kwh in a models s. Definitely possible if you drive super slow under ideal conditions. This has nothing to do with daily driving of course
     
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