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Battery efficiency

Discussion in 'Model 3: Driving Dynamics' started by Varnick, Aug 27, 2018.

  1. Varnick

    Varnick New Member

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    What is the best method, simple method to calculate battery efficiency in terms of mileage?
    I am watching % use and miles traveled. I am getting betwee. 2.7 miles to 3 miles per drop in 1% of the charge.
    Is this average? Good? Poor?
     
  2. Zaxxon

    Zaxxon Supporting Member

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    The Wh/mi is what to watch. 220 is about what you need to get the advertised miles/charge.
     
    • Informative x 1
  3. dhrivnak

    dhrivnak Active Member

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    That seems right as 100% would be 310 miles or right at 3 miles/%.

    Or right at 232 watts/mile seems to be the factored range number. Higher than that you will start to fall short below that you can go farther than the 310 miles.
     
  4. Varnick

    Varnick New Member

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    Thanks. This helps. I m new to this forum and I just got my M3 2 weeks ago. I m getting used to it and understand how to make most out of this wonderful driving machine.
     
    • Like x 3
  5. jamnmon66

    jamnmon66 Member

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    300 wh/mi ~ 250 mi. range.
     
  6. karpetkutter

    karpetkutter Member

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    353 Wh/Mile

    81.1% Efficiency according to teslafi for my recent drives. a little heavy footed for sure
     
  7. DannyHamilton

    DannyHamilton Member

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    I thought the LR has a 75 kWh pack?

    If it does, then your math doesn't seem correct.

    75000 watt hours / 310 miles = 241.9 Wh/mi

    Using more than 242 Wh/mi should result in total range on a full battery of less than the advertised "factored" 310 miles (since you're using too much electricity).

    Using 241 Wh/mi or less should result in total range on a full battery of more than the advertised "factored" 310 miles (since you have extra electricity left over).
     
    • Informative x 2
  8. Zaxxon

    Zaxxon Supporting Member

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    I'm going off of TeslaFi, which definitely uses 220 Wh/mi as its 100% rated range number. With that said, I do not disagree with your math.

    I'm not sure why TeslaFi uses a lower number. Maybe to account for the fact that you can't actually drive the full 310 miles from 100% to 0% in a useful manner, especially given vampire drain. Or maybe they are using the 'real' EPA earned number for the 3 LR, which is 334 miles of range. Assuming 334 and 75 kWh comes to 224 Wh/mi.
     
  9. SigNC

    SigNC Member

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    This is impressively high. Even driving highway at 75mph i never see 300Wh/mile on RWD 3 with 19s.
     
  10. karpetkutter

    karpetkutter Member

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    I think it was a bunch of launches, air cranked driving. Since then my numbers have leveled out Im now seeing an average of 283Wh/Mile
     
    • Like x 1
  11. cbutters

    cbutters Member

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    Like OP, I also like to put the battery so it shows in terms of percentage... it gets roughly 300 mile range, so each percent equals 3 miles. Thinking about the battery in terms of percentage makes sense to me; and if I need to get back to "How many miles do I have left?" you just times the battery percentage by 3 and you have a range number... so if at 20%... you know you have 60 miles left. For my brain, that is a lot easier than seeing 178 miles and having to do a division of 178/310 to figure out the battery percentage.
     
  12. UltralightBeam

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    For the performance+ models, I wonder how big a hit it is to ride with the 20” setup?

    Or, if dropping to 19” in the future would help a lot? Wish Tesla made 19” Aeros for sure. Saw this (below towards bottom of comment) comment in another thread which is why I’m bringing it up here.

    Ludicrous Mode for P3D+ only or P3D- inclusive?
     
  13. peachfuzz0

    peachfuzz0 Member

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    It's even easier in Kilometers. 500KM range so 50KM = roughly 10% and so on and so forth.
     

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