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Max charge: 407 km rated range, actual capable rated range: <380 km (@ 190 wh/km)

Discussion in 'Model S: Battery & Charging' started by mlaureti, Jul 28, 2014.

  1. mlaureti

    mlaureti Member

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    #1 mlaureti, Jul 28, 2014
    Last edited: Jul 29, 2014
    Car says: max charge at 407km of rated range. (Meaning: 407km if consumption is 200 wh/km)
    At the end of the trip (without stopping): The car did 377 km with average energy of 190 wh/km with 4km left.

    If I understand this properly, my real actual max charge gives me less than 380km of rated range on a full charge. (< 237 miles)
    This means I lost more than 50km (>31miles) after 1.5 year, am I correct?

    Have you noticed the same degradation level?
    I attached a picture of my last trip, it is in km. Next time, I will set the unit of the car in miles.

    No air conditioning / heating was used during this trip

    Thanks for sharing your numbers / real life experience about your actual capable rated range.

    I also created a shared public spreadsheet: Battery Stats - Google Sheets
     

    Attached Files:

  2. Mario Kadastik

    Mario Kadastik Active Member

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    I have noticed too that one has to spend 190Wh/km or less to be about on-par with the typical range deduction, the reason seems to be that starting from some firmware (5.9?) the climate usage isn't reported in this usage. Therefore your actual Wh/km are higher. When I got me car in Dec '13 I could spend 79kWh and still drive (battery indicator showed 4% remaining even though I was 10km already past charge now. Now it's more like 70-72kWh from full charge that I'm approaching 0 with far less behind charge now. Though I usually range charge to 398-402km I've been able to go 396km with 24km left snd average around 186Wh/km, but it wasn't a hot day so cooling probably didn't work that hard.
     
  3. RiverBrick

    RiverBrick Active Member

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    I believe there are still 4-5 kWh available as a reserve after you hit zero. This would mean that you have a total of ~77kWh. If a new 85 offers ~81kWh, you're down 5%. I'm not sure how that compares to average given the age of and kilometrage put on your battery.
     
  4. Kalud

    Kalud Member

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    Corrected. Rated range is not at 200Wh/km but more like 178Wh/km.

    Your numbers looks fine, 407 is on the low side (to me) but I'm only at 16,000km. I get 420km for a 100% charge, down from the 430 initially. But its hard to base anything on these 100% charge numbers because when I updated from 5.8 to 5.9 (or 5.11, not sure) I went back to 430km 100% range... Its an estimation, not an exact representation...

    For comparison, distance to 0 km remaining:

    At 178Wh/km I get 420km max (rated range is 420 for 100% charge on my car) 90-100km/h no headwind, flat terrain
    At 200Wh/km I get 365km (120km/h, no headwind, flat terrain)
    At 250Wh/km I get 305km (cold winter, snow)
     
  5. mlaureti

    mlaureti Member

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    Thank you for the Clarification Kalud regarding the rated value of 178!
     
  6. Cottonwood

    Cottonwood Roadster#433, Model S#S37

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    For my 85 in the U.S., I have found the rated miles = actual miles, Wh/mi factor to be 290 Wh/mi. 290 Wh/mi / 1.6093 km/mi = 180 Wh/km, pretty close to 178 Wh/km.
     
  7. Kalud

    Kalud Member

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    Okay, did some experiment this morning, the rated km is at about 183 Wh/km.

    table.png
    IMG_3262 - small.JPG IMG_3263 - Small.JPG
    IMG_3264 - Small.JPG IMG_3265 - Small.JPG
     
  8. mknox

    mknox Well-Known Member

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    I have not run my battery to anything below bout 35 miles, but I can tell you this: When my car was new, a Range Charge gave me 265 miles on the nose. I now get around 241 after 17 months and 31,000 miles of ownership. That's about a 10% reduction. In my case, it may not actually be that bad because I've never "tested" it by running it right down, and the car's calculation may be somewhat skewed by the fact that I rarely charge to full and run to empty.
     
  9. In2oil

    In2oil Member

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    My Current TESLA which is only 7 months old and with 5060km. When purchased NEW i was getting @ 90% 474km. Now I get 471km. My Rated range is 364km or 226miles. My energy usage is quite low, I think, for a P85D. From NEW it is 189wh/km
    I am a little disappointed to see this much degradation to my battery with so little usage.
     
  10. Vger

    Vger Active Member

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    Many people have reported, and there indications from the LiIon battery literature, that degradation proceeds a little more rapidly at the very beginning, then levels off so a much slower rate for a long time (at least 5 years). So I would not be too concerned. Those of us with 3-year-old batteries are seeing very little additional degradation.
     
  11. mknox

    mknox Well-Known Member

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    Yep. See my post above from last summer. I'm now at 61,000 miles and seeing almost exactly the same numbers as I did 14 months ago.
     
  12. sandpiper

    sandpiper Active Member

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    I forget where I read it, but ideal range is based on 188 wh/km. And I've found that this works out pretty much exactly on my various trips.
     

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