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Abnormal consumption Model S P85D

Discussion in 'Australia' started by P85D2, Dec 17, 2019.

  1. P85D2

    P85D2 Member

    Joined:
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    Location:
    Melbourne
    Hi there!

    This is my first post here as I’m a happy new owner of a second-hand Model S P85D from 2015.

    I have been using my Tesla for a month now, and I’m wondering if the energy consumption is « normal ».

    From the « Trip » screen in the car, I’m consuming on average 250Wh/km. That seems a bit high to me and I just wanted to know is it’s normal after only 48K km. As a result, I can only ride 100-150 km from 80% to 20%.

    I’m not particularly driving like a maniac and I’m most of the time in the traffic jam in Melbourne.

    If someone can help me understand that’d be great. Let me know if you need more info.

    Here some info about the car:

    Wheels: 21" with brand new tyres (Michelin Pilot Sport 4S)
    Year: 2015
    Model: S P85D
    Odometer: 47K km
    Dashcam installed


    Thanks, everyone
     

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  2. DrHoon

    DrHoon Member

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    Range mode turned on? Regeneration set to standard?
     
  3. zswilliams

    zswilliams Member

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    I also have a 2015 P85D. The wh/mile for 'rated range' is 310. This is with 19 inch wheels. You could expect slightly higher consumption with 21 inch wheels, maybe 10wh/mile. So to translate to km, that's 186wh/km for rated, and likely 190-195 for the 21 inch weels for rated range.

    I've averaged over the lifetime of the car (combined city/highway, with a good chunk of highway) less than 320wh/mile, so within about 3% of rated, which I think is pretty good.

    I never use range mode. It only served to wear my front tires down faster. Without range mode, they wear evenly across front and back. :)

    Things that affect consumption significantly.

    1: Weather, especially cold. The battery heater is a strong power draw.
    2: Speed. Going above 110km/h will significantly increase consumption.
    3: Lower regen settings (though I don't have numbers to back this up).

    So 250wh/km seems high, but it's such a short sample of only 24km, that it could just be as simple as the battery being brought to a normal temperature. I often see higher consumption for the first part of a drive before it comes down once everything is at a nice temp.

    If there are any environmental factors or settings you can think of, let us know, but I wouldn't be too worried.
     
  4. P85D2

    P85D2 Member

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    Location:
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    Hi All,

    Thanks for your prompt answers. I think something is definitely wrong here. I don't have the Range mode activated, but the regeneration is set to standard. Regarding the weather, I live in Melbourne and we are around 20 degrees on average (nothing cold).

    @zswilliams, the 260 wh/k is on a 600km sample (3rd line) so I'm assuming that what to car actually consumes.

    I almost never went on the highway as I'm living in the city, I'm mostly stuck in the traffic jam.

    What do you recommend, should I take an appointment with Tesla?
     
  5. meloccom

    meloccom Moderator Aus/NZ

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    Location:
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    What are your tyre pressures? The tyre placard is on the bottom of the B pillar when you open the drivers door.
     
  6. LDCRS

    LDCRS Member

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    Location:
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    How long have you owned it for?

    Reason I ask is because your right foot may still be a bit pedal happy if you're still quite new to it. I know I was....

    Even so - I don't think I drive particularly conservatively either. I just love that instantaneous torque! I average about 205wh/km inner melb on a model S 75D
     
  7. Blue heaven

    Blue heaven Fair Dinkum Tesla

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    #7 Blue heaven, Dec 17, 2019
    Last edited: Dec 17, 2019
    @meloccom makes a good point, 21 inch tyres should be 42psi at room temperature, anything less and the extra rolling resistance will increase energy use.
    21 inch tyre/wheel combination consume on average 10% more energy than 19s.
    Make sure regen is on highest setting, don't back off accelerator pedal hard or energy just gets turned into heat.
    When I spent a few days in Melbourne traffic I couldn't get anywhere near my lifetime range, I think it's just the nature of the Melbourne roads/traffic flow.
    Don't be concerned with range around the city and suburbs, enjoy the car, enjoy the acceleration, electricity to move a car is far cheaper than petrol. It's on long trips between charging points that energy efficiency is needed.
    Edit: I just noticed you have brand new tyres, this will also provide poor range for the first 200kms.
     
  8. paulp

    paulp Active Member

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    I would have thought you should be around 200 wh/km. Tyres etc will make a difference but not to the degree you have.
    Some key points;
    If your journey is uphill, the consumption will be a lot higher, for example, I live on the coast and use way more energy going to the city (44m above sea level) than I do going home. If I head into the hills the consumption rockets up.
    Each time you do a rapid takeoff you will use more power. Have a look at your graph. If you are seeing spikes each time you take off, then you just have to accept that the fun has a cost at your power meter.
    If none of the above applies to you, jump on the app and book a service with tesla. Select the closest match to the problem. You probably need at least 500-1000km of driving to know what your true average range is, excluding your first fortnight to month of ownership. Demo rides destroy your average.
     
  9. Tasdoc

    Tasdoc Member

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    Location:
    Melbourne
    If you’re in a heavy and slow traffic most of the time your climate/distance energy expenditure ratio is likely to be a lot higher. Try to drive with climate off (perhaps, not in this weather) and see if it makes any difference.

    I live in Melbourne, but 80% of my driving is in Rural Victoria, so my MS75D’s lifetime average after 70,000 ks is 183wh/km. It doesn’t vary much on highways, but in Melbourne it can be anywhere between 150 and 250 wh/km
     
  10. P85D2

    P85D2 Member

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    My tyre pressure is above 42psi and I had them for more than 600km so that should affect I reckon.

    Do you think the driving mode affect this as well? I usually drive with the Insane mode activated, should I consider the chill mode? Does it make a difference?

    I think after 1 or 2K km, I'll book to Tesla to check if I'm still that high, I realised that I can't even do more than 150km with 90% charge, that's not cool :-(

    Also, is there a way to check the battery health? How can I be sure that my battery is not damaged?
     
  11. Blue heaven

    Blue heaven Fair Dinkum Tesla

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    Keeping the car in insane mode is fine if you're smooth with the right foot, what range do you get sitting on 100kmh on a smooth road on a moderate day? (20-30c) once the tyres warm up and the aircon settles down you should be getting around 180-200wh/km over the last 10kms with the 21 inch tyres, no hills, not windy.
     
  12. PJF000

    PJF000 Member

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    OK for vanilla "Insane" however if you have it set to "Insane +" then that is your problem.
     
  13. P85D2

    P85D2 Member

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    I tried the car on the highway for about 10km, and I noticed that my average was 190wh/km. I have a friend who own the exact same car (same year, same wheels, etc.), he is also driving around the city with all the traffic jam and his average is 150... Something is definitely wrong here.

    I asked Tesla to check the issue on the phone, they are investigating and they will gt back to me soon. I'll keep you guys posted.

    Thanks again for your help!
     
  14. EcoCloudIT

    EcoCloudIT Active Member

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    150 around town is nearly unheard of, 190’ish on the highway in your Model is about right....
     
    • Like x 1
  15. baillies

    baillies Member

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    is a brake pad rubbing? Does the car pull left or right on a flat surface? Maybe pump the breaks and see if it frees?
     
    • Helpful x 1
  16. Rockford

    Rockford Member

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    Here is mine, same car/wheels etc. Not sure how your mate is getting 150 around town. I get around 340Km per charge at std charge position.

    tezbatt.jpg
     
  17. P85D2

    P85D2 Member

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    ERRATUM: My mate made a mistake. When I asked him again based on your reactions here, he had a closer look and he is more close to 190 on average, not 150. Sorry about this I was just repeating what he said.

    @baillies, not sure what you meant by "pump the brake"
    @Rockford thanks for sharing!

    I'll let you know when Tesla will get back to me
     
    • Like x 1
  18. baillies

    baillies Member

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    Press hard on then off the brakes a few times. You can also try driving slow in forward/reverse with the windows open and listen for the brakes rubbing (or get someone outside to listen). Of course a mechanic can check this easily as well. There are some maintenance videos mentioning them sticking and applying grease(?) to help reduce this. Due to the lack of use brakes are susceptible to rusting and jamming more than ice cars.
     
  19. Dborn

    Dborn Confirmed

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    Yikes! NO GREASE ON ROTORS OR PADS. PLEASE!!!!! TOTALLY CONTRAINDICATED! Any lubrication on the brakes (and I doubt that any is required even if they stick) should be carried out by a VERY qualified mechanic!
     
    • Like x 2
  20. baillies

    baillies Member

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    Of course not on rotors or pads, of course by someone who knows what they are doing.
     
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