Why can't I get 8.8kwh miles?

Discussion in 'Prime Main Forum (2017-2022)' started by SydneyNJ, May 30, 2019.

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  1. Salamander_King

    Salamander_King Senior Member

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    Is it really 5.46kWh is the 100% EV battery amount that get charged into the traction battery used for EV MODE drive? Because if that is the case, 25 miles of EV range represents 25/5.46=4.58miles/kWh. My current lifetime Total average electricity consumption (shown on the Drive Monitor 2) is 4.44 miles/kWh, meaning I am not even getting EPA average.
     
    #81 Salamander_King, Jun 4, 2019
  2. SydneyNJ

    SydneyNJ Junior Member

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    I'm assuming, on your local electric utility company side, you're only use the electric rate to figure this out and no other variables (ie taxes) are included. If I do that, my is around 2.2cents/mi
     
    #82 SydneyNJ, Jun 4, 2019
  3. Salamander_King

    Salamander_King Senior Member

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    Still far better than mine. From my ~2years, ~29K miles of my own data on actual paid electricity and gas calculated on this thread. What is your miles/kWh (total average electricity consumption) on the "Drive Monitor 2" | PriusChat I get following cost/mile.

    EV MODE $456 for 9597miles or 4.75 cents/mile (average rate of electricity paid $0.1796/kWh)
    HV MODE $861 for 19343miles or 4.45 cents/mile (average cost of gas paid $2.4185/gal)
     
    #83 Salamander_King, Jun 4, 2019
  4. jb in NE

    jb in NE Senior Member

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    No, my calc is with everything. Low electric rate in the winter with a residential heat pump. 7.5% sales tax.
     
    #84 jb in NE, Jun 4, 2019
  5. SydneyNJ

    SydneyNJ Junior Member

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    I was always suspicious about those estimated mileage numbers under "Drive Motor 2". So I did a test today on my way
    back from work. I had 10.1 miles left/estimated (the middle one with no fan). Then I reset my TripA odom and started driving
    on EV. I intentionally drive it until the PRIME switches to HV and it did when it reached 0.1 mile left. However my TripA only
    registered exactly 6.0 miles. What happened to the 4.1 miles? Well maybe not exactly 4.1 since it's a projection but I did not
    expect the projection to be this worse!!. If my math is correct, the accuracy of this projection was only at 60% !!! No wonder I felt like I had to charge more than I should be for the week.

    Are you guys out there experiencing this as well?
     
    #85 SydneyNJ, Jun 5, 2019
  6. Salamander_King

    Salamander_King Senior Member

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    GOM (Guess-O-Meter) prediction is based on your past records. If you drive the same condition every day, it gives you a fairly accurate estimation, but if your driving condition is different day by day, then well, it is a wild guess. Mine is almost always within a few miles for my daily commute route.
     
    #86 Salamander_King, Jun 5, 2019
  7. SydneyNJ

    SydneyNJ Junior Member

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    My daily EV driving is pretty much consistent. 7.2 miles local EV driving to train station and back coming home
    from work. Showing me 10.1 when I could only go 6.0 is not acceptable. Well I need more data points.
    I will do a few more tests and see if I'm getting the same results.
     
    #87 SydneyNJ, Jun 5, 2019
  8. litesong

    litesong Active Member

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    When it does get hot, why "bear it", when you can "bare it".
     
    #88 litesong, Jun 5, 2019
  9. Digloo2

    Digloo2 Active Member

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    Mine estimates a full charge to be worth 31-34 miles. I've never gotten that, but I've come close to 30 a few times. Mostly it ends up in the 25-27 miles per charge range.
     
    #89 Digloo2, Jun 5, 2019
  10. SydneyNJ

    SydneyNJ Junior Member

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    When I do a full charge, 90% of the time, I get this number 35.1 displayed on my MID. The middle number
    under "Drive Motor 2". The test I did coming home today I had 10.1 miles left according to MID. This is roughly
    1/3 remaining of my full charge. So in effect, I'm "losing" 4.1 miles of 1/3 of the charge is pretty bad or this guesstimate was
    extremely unreliable. Imagine you had zero gas and you though you could go an extra few miles to
    the nearest gas station.
     
    #90 SydneyNJ, Jun 5, 2019
  11. jb in NE

    jb in NE Senior Member

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    The Guess-O-Meter is cute, but I totally ignore it and estimate myself based on battery percentage and how I’m actually driving. This has proven fairly accurate.
     
    #91 jb in NE, Jun 5, 2019
  12. SydneyNJ

    SydneyNJ Junior Member

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    Hey! I still love my 2018 Prime. :) Last weekend was the first time I had to fill up the gas tank after driven ~1000 miles.
     
    #92 SydneyNJ, Jun 5, 2019
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  13. SydneyNJ

    SydneyNJ Junior Member

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    I will have to play around with the MID. Haven't really looked at everything since I bought it back in April. Maybe I give this
    Battery % a try.
     
    #93 SydneyNJ, Jun 5, 2019
  14. bisco

    bisco cookie crumbler

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    what does 'drive motor 2' stand for?
     
    #94 bisco, Jun 5, 2019
  15. SydneyNJ

    SydneyNJ Junior Member

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    My bad.... It's "Drive Monitor 2". If you typed in wrong the first time, copy/paste would definitely repeat the same mistake. :)
     
    #95 SydneyNJ, Jun 5, 2019
  16. bisco

    bisco cookie crumbler

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    ah, thank you.(y)
     
    #96 bisco, Jun 5, 2019
  17. Salamander_King

    Salamander_King Senior Member

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    I think he means "Drive Monitor 2". It shows EV related info. Average miles/kWh and two GOM numbers (one without AC and one with AC).

    IMG_20190604_104722.jpg
     
    #97 Salamander_King, Jun 5, 2019
  18. bisco

    bisco cookie crumbler

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    is that based on a/c use, or is it just the same calc it uses when you turn the fan down?
     
    #98 bisco, Jun 5, 2019
  19. Salamander_King

    Salamander_King Senior Member

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    It's the same number I get on the HSI with AC on or off. Just the different display for GOM.
     
    #99 Salamander_King, Jun 5, 2019
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  20. triggerhappy007

    triggerhappy007 Active Member

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    He's got the Prime AWD prototype
     
    #100 triggerhappy007, Jun 5, 2019
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