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My batteries recharging themselves?

Discussion in 'Model S: Battery & Charging' started by Bobbyducati, Apr 28, 2015.

  1. Bobbyducati

    Bobbyducati Member

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    So, unplugged from work today with 155 rated miles charge [1] at 3:55 pm today. I went to the gym near by, drove on home. I just checked my app to see what my current charge was (just being bored and plugging thru the apps on my phone) and noticed it was at 154 rated miles [2] . I thought to myself: "thats odd, im almost certain i left work with 155, and i drove about 5 miles since then." So I then proceeded to go check my car to see if this was just an app screw up or something weirder [3] .
    TL : DR: drove 4.6 rated miles yet only dropped 1 rated mile on my charge.
    Anyone have any ideas on this? Product of the batteries balancing themselves, perhaps?
     
  2. eco5280

    eco5280 Member

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    Doesn't range miles use logic to calculate based on your driving? It's not a direct measure of kWh left in the 'tank' I don't think.
     
  3. Bobbyducati

    Bobbyducati Member

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    #3 Bobbyducati, Apr 28, 2015
    Last edited: Apr 28, 2015
    i checked the the settings in the car, and its rated miles: 154 and ideal miles 177. I was under the impression a rated mile was based on 304wh/m, not recent driving habits, but I could definitely be wrong.
     
  4. brianman

    brianman Burrito Founder

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    "Rated" seems to vary by at least variant (40/60, 60, 85, P85, P85+, 70D, 85D, P85D) and possibly by production time. The value "304" might be used for some cars, but not all.
    Correct.
     
  5. Bobbyducati

    Bobbyducati Member

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    interesting, i always thought the 304 wh/m figure was an EPA standard.
     
  6. FlasherZ

    FlasherZ Sig Model S + Sig Model X + Model 3 Resv

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    Temperature can have an effect on range calculations.
     
  7. Dien Kim Nguyen

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    Going downhill? :biggrin:
     
  8. Mario Kadastik

    Mario Kadastik Active Member

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    Not seen it in the middle of SoC range, but I have seen this at the top. At pack balancing it doesn't necessarily give you the range while it balances (it'll show up the next time you recharge), but I have left home with 396km and even after 8km it was still 396km, only after that started to drop according to actual usage. So I was able to use the extra kWh from balancing and the range remaining showed the capacity, but oddly at the time had a cap from where it started balancing. Been only 1-2 cases like that though for me so not a common thing ;)
     
  9. Bobbyducati

    Bobbyducati Member

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    this seems like the most reasonable explanation to me.
     

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