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Range with MX90D

Discussion in 'Model X: Battery & Charging' started by Ormond, Sep 17, 2016.

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  1. Ormond

    Ormond Member

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    What range can I expect with a 90D? I drive 75mph on the highway and always have the a/c running. I'm in Florida. I'm a conservative driver. I ordered the 20 inch wheels.

    Thanks!
     
  2. goneskiian

    goneskiian Active Member

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  3. goneskiian

    goneskiian Active Member

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    Sorry. Looks like you found it.
     
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  4. Ormond

    Ormond Member

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    I did. Thanks! I'm not used to wh/mile. I guess I will when my car arrives.
     
  5. volkerbradley

    volkerbradley Member

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    This may help a little to understand range and Wh/mi. In Degredation of battery? several contributors seemed to agree that 72.2kW are available on a 90 kW battery at 90% charge.
    If consumption has been 430 Wh/mi, then if continuing under the same conditions for 100 miles, the consumptions would be 43000Wh/100mi or 43 kWh/100mi. Therefore the range for the 90 kWh battery would be 209.30 miles for the entire battery or 2.33mi per kWh under these conditions.
    Using these calculations:

    Range with 90%
    Gauge Miles per kWH charge to 72.2 kW

    430 Wh/mi 2.33 mi 167.91
    420 Wh/mi 2.38 mi 171.91
    410 Wh/mi 2.44 mi 176.16
    400 Wh/mi 2.50 mi 180.50
    390 Wh/mi 2.56 mi 185.13
    380 Wh/mi 2.63 mi 190.00
    370 Wh/mi 2.70 mi 195.14
    360 Wh/mi 2.78 mi 200.56
    350 Wh/mi 2.86 mi 206.29
    340 Wh/mi 2.94 mi 212.35
    330 Wh/mi 3.03 mi 218.79
    320 Wh/mi 3.13 mi 225.62
    310 Wh/mi 3.23 mi 232.90
    300 Wh/mi 3.33 mi 240.67
    290 Wh/mi 3.45 mi 248.96
    280 Wh/mi. 3.57 mi 257.86
    270 Wh/mi. 3.70 mi 267.41
    I have found that these figures correspond closely to my trip experience.
     
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  6. volkerbradley

    volkerbradley Member

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    I notice that my browser does not format my previous reply properly. If you notice this, click on Reply to see what I actually wrote.
     
  7. Ormond

    Ormond Member

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    It looks fine on my iPad. Thank you for taking the time to post the numbers.
     
  8. Nerdy_Engineer

    Nerdy_Engineer Brett - The Nerdy Engineer

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    If you're ever concerned about range on a road trip, slowing down 5-10mph will make a huge difference in range. AC has an effect too, but speed above 65 seems to have the largest effect.
     
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  9. ptsagcy

    ptsagcy Member

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    +1
     
  10. EV-lutioin

    EV-lutioin Member

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    This info helps, since my MX has averaged 350Wh/mi over the last 7,000 miles so, I think the answer to Ormond's question is; you can expect about 206 miles range. Of course you can always increase range by driving a bit slower, it seems like under 65 mph is the magic number.
     
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  11. dapao

    dapao Member

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    I drive 80 miles/ hour and I think I can get 220 right now.
     
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  12. modelxowner

    modelxowner Member

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    I am no physicist, if the 60D is good for 200 miles, shouldn't the 90D is good for 300 miles? Is tesla holding something back without telling us?
     
  13. EV-lutioin

    EV-lutioin Member

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    The 90D is much more powerful.... zero to 60mph in 4.8 seconds, I think that may have something to do with it. Same thing happens in ICE cars with bigger engines.
     
  14. Saghost

    Saghost Active Member

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    Actually, Tesla is giving you something extra. The X60D shouldn't have a 200 mile range - the X75D is the same pack, and is rated for 237 miles.

    Since the 60 should have 80% of the capacity and be otherwise identical, it shouldn't get more than ~190 miles. So Tesla apparently allows somewhat more than 80% of the 75 usable range for the "60" (seems to be equivalent to about a "63" from the EPA range)

    "90"s are on the small side - they have the same modules as 75s, but 16 instead of 14 in series (75*16/14 = ~86). The original "85" probably should have been called an 80; folks on the forum think it has about 81-82 kWh of energy including the bricking reserve, and as you just saw, the 90 is really about an 85.

    Also, the 90 is a heavier car, which increases the energy used per mile by a small amount.

    Interestingly, comparing the EPA ranges of the P100D and P90D suggests the 100 is a real 100 (it goes ~16% further than the P90D in either X or S form, not the 11% you'd expect from the numbers - right on 100 if the 90 is really an 86.)

    Some folks believe that the X90D EPA rating is understated- comparison with the S90D suggests it should be in the 264-265 neighborhood, and the rated range at 100% charge seems to be close to that. The theory folks have put forward is that Tesla voluntarily rated it lower so the decreased range of the XP90D wasn't as obvious. (And Tesla has voluntarily lowered ratings on occasion before - the original 70D tested as 246 according to documents but Tesla rated it as 240.)
     
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  15. dapao

    dapao Member

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    90d is heavier. so you cannot just do math to 300 mile
     

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