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Worst energy usage?

Discussion in 'Model S: Driving Dynamics' started by rick325, Jan 5, 2013.

  1. rick325

    rick325 Member

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    I see a lot of commentary around "most efficient" Wh/m. I'm curious what the "worst" you will get is when driving hard, with A/C on full blast, up hills, etc. I've seen numbers as high as 425 Wh/m over 30mi+, but am guessing that 500+ is possible (over an extended period). Thoughts?
     
  2. contaygious

    contaygious Active Member

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    Need to check, but I get about 160 projected average range. Not quite the 300 I was hoping for.
     
  3. AnOutsider

    AnOutsider S532 # XS27

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    If we're talking peaks, I've hit 1323 wh/mi before. I drove about 80mph down the highway, and actually kept pretty close to 450ish on average (which I was impressed by). So it seems like it's hard to be really innefficient, but sadly, also quite hard to be REALLY efficient (I think 300miles would need to be at 275-ish wh/mi avg). I've NEVER seen under 300.
     
  4. SCW-Greg

    SCW-Greg Active Member

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    Do you mean on average? As in consistently, with your daily driving habits?
    Or just when you drive it super hard?
     
  5. AnOutsider

    AnOutsider S532 # XS27

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    I get 175 with my daily driving habits :( Granted that's also on a standard charge
     
  6. rick325

    rick325 Member

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    I mean on average, or a sustained amount of time hard driving. I'm not really worried about what happens over 2-5 miles and what an instantaneous peak while accelerating . The reason is there is a car club in Austin that I routinely drive with, and we have a 100-150 mi circuit. Lambos, Ferraris, BMWs, other fun and interesting cars. I'm just wondering if I could drive hard (85-100 mph for large portions of it), be comfortable (AC on), and comfortably make it home on the longer drives.

    450 Wh/m is encouraging as an "inefficient" driver. Can/will it be worse? (Again, too much time on my hands without a car to play with!!).
     
  7. dashrb

    dashrb Member

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    Yes, I've been wondering this too. My ICE got horrible gas mileage when driving it on the track (SCCA, 2+ mile track). The driving pattern is: punch it full throttle, apply brakes, repeat. I assume I won't be able to take the S to the track, but I'm curious how long the battery would last.
     
  8. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    I don't see why you couldn't take your Model S to the track. Others have.
     
  9. AnOutsider

    AnOutsider S532 # XS27

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    I plan to take a trip to the christiana mall today in DE and will use the supercharger. I can just make it there and back on a single charge (85 miles one way), but I firstly want to use the SC and secondly want to see what I can get distance-wise driving "normal". I'll clear out my computer before leaving and report back my average usage.
     
  10. GeekGirls

    GeekGirls Kid in Candy Store

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    During my regular commute I see 600 Wh/mi averages climbing to the local "summit" – so if you're gaining elevation dramatically on a trip you can expect 1/2 or even 1/3 of the rated range (since my climb is steady but not steep and my use of climate control is quite modest.) The good news is that coming back down is extremely efficient. The average for my entire trip has been as low as 308 Wh/mi and is routinely right around the rated range at 320 Wh/mi.

    Tesla may want to consider supercharging stations on either side of dramatic mountain passes!
     
  11. rcc

    rcc Model S 85KW, VIN #2236

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    You want to drain power? Put the defrost on. I saw energy usage jump from ~340-350 Kwh/mile (consistent with what I'd been getting in highway driving) to 511 Kwh/mile when I pulled out from the Gilroy supercharger onto the highway, then put the defrost on.
     
  12. dashrb

    dashrb Member

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    @Jerry33, thanks for the link. That chatter was about the Roadster, and the post on page 2 said he could go about 7 minutes before degrading due to motor heat. Of course the S is different. The track sessions I've driven in have been 20-30 minutes of track time, followed by 30-40 minutes of rest time while another group (or 2 depending on crowd size) goes, to fill an hour cycle. You get 4 or 5 cycles of this in a day. so with either a 50% duty cycle per hour, or 33% duty cycle per hour, is it practical to spend 4 or 5 hours at the track in an S?

    These are horrible conditions in terms of fuel consumption. (And excellent conditions for inducing wide grins). If anyone has driven this sort of "all-out" method in a model S, how much energy was consumed? Was there any over-heating issue?
     
  13. shokunin

    shokunin P85 & S40

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    I find highway driving to be pretty efficient, I get killed in the city though. Most of my city streets are 50-60mph street limits so there's quite a bit of acceleration, but even when I take it pretty slow I always seem to average out 400wh/mi in the city, on the freeway I get away in the low 300's.

    It takes a lot of energy to get the model S moving, once at speed it's pretty efficient unless you're going over 80.
     
  14. brianman

    brianman Burrito Founder

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    1. Put on swimwear
    2. Roll down all the windows
    3. Open the pano roof
    4. Turn on all your lights (including hazards)
    5. Turn AC to HI/LO (HI if it's cold out, LO if it's hot out)
    6. Floor it regularly
    7. Use brakes heavily
    8. Drive uphill into the wind
    9. Turn the radio up to 11
    10. Put something very draining into your 12V outlet (like a hairdryer on full blast)
    11. Use both USB ports to charge your tablet/laptop and phone

    There's lots you can do to burn energy. ;)
     
  15. ADN_ModelS

    ADN_ModelS Member

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    Over the last 30 miles I've averaged nearly 800 Wh/mile. And, I drive like a snail. This is a result of cold weather and short trips. My rated mileage is around 80. Good thing I got the 85.

    IMG_1234.jpg
     
  16. contaygious

    contaygious Active Member

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    165 average projected nearly all the time. Rated is 215 on standard charge.
    Shokunin your city limit is 60? I want to live in that city! :wink:
     
  17. rick325

    rick325 Member

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    Whoa... 800 Wh/m just by blasting the heater? Is anybody else seeing that the heater (or the AC) at full blast is draining 350+ Wh/mi?

    Actually, now that I think about it, the slower you drive the higher your "tax" is going to be from heating and AC (on a Wh/mi) basis. Maybe a better number is "Wh/minute" for the Heater and A/C? Hmm....
     
  18. FlasherZ

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

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    Driving to St. Louis to the airport, into a 30 mph wind, 15 degrees outside, I managed to average ~550-600 Wh/mile at 70 mph over 55 miles of driving. Coming back, with the wind's help, I averaged 300-325.
     
  19. Beavis

    Beavis Signature 991

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    It's cold and it's heating the battery.
     
  20. vfx

    vfx Well-Known Member

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    Load up the frunk with lead or bricks.
    Get 6 250 plus people in the car.
    Fill up that back full of dwarf star matter
     

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