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Tesla Model Y Long Range Only Hits 220 miles in Real World Test

Discussion in 'Model Y' started by Nuclear Fusion, Feb 28, 2021.

  1. NCC81701

    NCC81701 Member

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    #61 NCC81701, Mar 3, 2021 at 10:00 PM
    Last edited: Mar 3, 2021 at 10:09 PM
    How hard one accelerates and decelerates can make a huge difference between in consumption; along with about a billion other things; yet this is unreported and doubt is standardized if they are just using human drivers instead of testing on a dyno. This is why EPA numbers are used even if they are more optimistic than real world.

    A big diff between ICE and EV is how much energy is actually stored on board. A gas tank holds an order of magnitude more energy; it’s just not very efficient with it. But it has so much in excess and so inefficient that things like temperature, and acceleration profile doesn’t alter range much.

    EVs stores precious little energy but it is extremely efficient with it. But if you start doing inefficient things like accelerating hard or driving 10mph faster it really starts to hit the range of the car.

    it’s this kind of nuance that IMO most Car magazines and journalists doesn’t understand yet and it is how we are ending up with such weird results because their underlying science is bad. It just didn’t matter before when comparing ICE cars to ICE cars. The tests that most publication does simply doesn’t have the signal to noise ratio to provide meaningful results comparing EVs to EVs.
     
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  2. Puma2020

    Puma2020 Member

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    #62 Puma2020, Mar 4, 2021 at 3:50 AM
    Last edited: Mar 4, 2021 at 3:55 AM
    I live way outside CA.
    I bought the LR Y for that reason. Most folks up here realize that winter changes the range of any car (ICE or EV).
    Cold air is more dense, so it takes more energy to push through it.
    We don't have superchargers (SC) everywhere (yet) but they are still expanding the SC sites.
    Driving conditions and terrain make a huge difference regardless of whether it is an ICE or EV.

    I believe, if I can do math correctly, that my range is in the low 300's.
    I got the car at the very end of June, 2020. It's been on many highways and also many country sloping back roads here in NH. It's been through it's first winter here. Heated seats set to 1. Temps set to 70.
    Also use Dog Mode a lot (summer and winter) which uses more energy.

    Below is a real world value. YMMV.

    2021_02_lifetime.JPG
    Note: The image of the car is their rendering. In winter, my Y doesn't ever look that clean! :)
     
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  3. pt19713

    pt19713 Member

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    75 kWh div .241 = 311 miles
    Realistically it's 72 kWh div .241, or 299 miles since 72 kWh is approximately what you've used when the display is at 0% since there's a zero mile reserve.
     
  4. mark95476

    mark95476 Member

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    There's nothing more inefficient than going uphill at highway speeds. This is my typical drive now that I have my Tesla.

    First pic: 943 Wh/mi avg over the past 5 miles, taken at the top of the mountain (~2500 ft)
    - Estimated range is 52 mi @ 66% SoC
    Second pic: 248 Wh/mi avg after 36.4 miles, taken at the bottom of the mountain (~sea level)
    - Estimated range increases to 219 mi @ 67% SoC

    saratoga_hill_climb.jpg

     
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  5. pt19713

    pt19713 Member

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    Yeah, going up a steep hill at 40 mph needs about 27-30 kW from the motors. That's the equivalent of driving at 75 mph.
    My area is generally flat so I don't have a lot of long uphill locations I can go at 60+ mph to see how much energy is needed from the motor(s).
     
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  6. bdwalters

    bdwalters Member

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    Anybody know why Tesla doesn’t just put a few more batteries in the SR Y to get the range up to 260 or so? This seems like an easy fix to me.
     
  7. Guvnah

    Guvnah Member

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    Cost! I think the margins on the SR are already a lot lower. The less batteries in a car the more cars can be made and sold. Also, I do think there will be a LR RWD eventually...so, don't want to get the SR RWD range too high...
     
  8. rxlawdude

    rxlawdude Active Member

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    Note that one thing they DON'T apparently control is ambient temperature.

    That's a critical omission.
     
  9. acarney

    acarney Active Member

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    And wind speed, in fact they don’t even seem to record that and comment on it. I’m trying to come up with a good way to record air speed at the front of the Y to do a series of range tests; I suspect the Y is more sensitive to wind than the 3 is. However, ready made kits with data loggers appear to be like $1,000+, which I don’t really want to spend. Still researching this and hopefully will be able to record a lot of telemetry soon with it...
     

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