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Poll on 40KW battery actual rated range vs age(miles) of car

Discussion in 'Model S: Battery & Charging' started by toolmanca1, Nov 24, 2015.

  1. toolmanca1

    toolmanca1 Member

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    I'm seeing a dramatic drop-off in range on my 40KW battery so I'd like to see what others are experiencing.

    So this is only for the few of us with 40kw models.

    What is your current "rated" (not ideal) range at 100% (not 85%) range?:
    What is your current mileage?:

    My answers are:
    Rated Range = 106 miles (that is a 25% drop from original 140 miles)
    Miles = 34,000

    That seems like too much degradation, but I have nothing to compare to.

    Thanks,
    Dave
     
  2. FlasherZ

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

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    There aren't that many 40's out there, so you may not get too many comparable results.

    You can look through some of the other degradation threads perhaps for 60 kWh batteries and draw conclusions.

    Have you asked Tesla to look at your battery pack? What do they say?

    This may be a problem in their range calculation algorithm when the battery pack is artificially limited via software.
     
  3. Lanber

    Lanber Member

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    Have you tried running it completly down and see if there is alot hidden below "charge now" msg? That and charging it fully back up, preferably more than once could give you back some indicated range
     
  4. Larry Hutchinson

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    Mine is 130 but the car is at only about 5000 miles.
     
  5. sorka

    sorka Active Member

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    You'd think with all of the unused capacity (it really being a 60 kwh battery) that they'd have designed the software to eat into the un paid for capacity to keep the observed degradation to a minimum or nothing at all.
     
  6. donv

    donv Member

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    I suspect that it's more of an indication problem-- just like if you only charge to 60% all the time on a 60 or 85. The way you normally fix this is through a few 100% charges, but of course on a 40 you can't do that.
     
  7. kennybobby

    kennybobby Member

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    Can someone post a picture of the battery label for an S40--don't think we've ever seen one. My guess is that it will have 'S1' in the top line description. S2 is 60 and S3 is 85?
     
  8. FlasherZ

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

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    I'm guessing it'll be just another S60 pack. The configuration on the car provides the software limiting.

    I'm not aware of any label or description posted for a 40 kWh. I'd be interested in seeing if my theory is correct (or yours is, for that matter).
     
  9. brianman

    brianman Burrito Founder

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    Sorry for the slightly off-topic...

    @toolmanca1 - I'd love to test drive your car for a little while (< 5 miles) sometime when I'm in CA if you're willing (perhaps in July?). If so, PM me for follow-up. Thanks in advance for considering the request.

    - - - Updated - - -

    My recollection is that [1] I've seen S2 labels on 60 kWh crates and S3 labels on 85 kWh crates at service centers and [2] S1 labelled crates/packs never went in customer vehicles (if they even existed as full packs).
     
  10. Andy Black

    Andy Black Member

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    33,000 miles and I normally see 130-135 rated just after a charge.
     
  11. vevans

    vevans Member

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    70,000 miles I saw 132 rated yesterday.
     
  12. aaron0k

    aaron0k Member

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    65,800 miles @ 130.

    Originally 140 for the first 6 months. Dropped briefly to 117 then we got the firmware fix. Rated range hovered at 134 for a over year. Now it's consistent at 130 for the last 8 months.

    If you're at 106, unless you're driving up mountains... I would make an appointment with your SC.
     
  13. tdvo

    tdvo New Member

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    35,000 miles and full charge hovers around 128-130.
     
  14. toolmanca1

    toolmanca1 Member

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    Thanks to everyone for the input. I have no mountains to climb in my daily commute so something is definitely wrong. Your input has been invaluable!

    I'll let you know how this ends up being resolved.

    Thanks,
    Dave

    - - - Updated - - -

    My "40" car has a "60" battery pack, they all do. Tesla wrote us a letter and said they decided to never make a 40 pack since almost no one wanted them. Dave
     
  15. kennybobby

    kennybobby Member

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    We still would like to see a picture of the battery pack label from a 40--one has never been posted.

    Is the pack voltage the same as a 60 and the controller just limits the available current draw? If so then maybe you get a true and full 40kWh without any reserve margin withheld, whereas a 60 doesn't get to use the full 60kWh nor an 85 gets the full 85kWh?
     
  16. toolmanca1

    toolmanca1 Member

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    Where is the battery label? I'll take a picture.

    The pack voltage is the same and Tesla actually allows all the "60" current to be used so the car performs like a "60." They just software limit the (artificial) capacity.

    Dave
     
  17. kennybobby

    kennybobby Member

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    Front right side of the pack behind the right front wheel well. May need to turn the wheels to the left for more room.

    Those packs should last a long time operated like that.
     
  18. Lanber

    Lanber Member

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    The best way to determin you actual available juice is to fully charge, then drive till it stops or thereabouts (20kw limiter)
    All else is guesswork
     
  19. toolmanca1

    toolmanca1 Member

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  20. dragyoul

    dragyoul Member

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    Had a max rated range of 146 miles when I received it in 2013.
    Dropped to 140 miles in 2014 after a software update.
    Dropped to 133 miles in 2015 after a software update.
    Dropped to 130 miles last week for an unknown reason.

    That's not very encouraging. I do everything I can to keep the battery as good as possible, but it keeps dropping. I do not feel like it's battery degradation, but some software updates that create artificial degradation. I'm very disappointed ...
     

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