TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

Wh/mi Too Much Lately ???

Discussion in 'Model S: Battery & Charging' started by Camera-Cruiser, Sep 8, 2016.

  1. Camera-Cruiser

    Camera-Cruiser Fully Charged

    Joined:
    Dec 4, 2015
    Messages:
    424
    Location:
    Fullerton, CA
    I live in fair weather Southern California, and it has been great the last month or so. 65 to 85 degrees or so.

    Yet it seems like my Wh/mi has been running really high while trying to drive relatively slow to normal. In the morning (again, maybe 68-70 degrees) the car can be in 400 to 500Wh/mi range for the first 10 to 15 minutes and I haven't broken 40mph or climbed a hill. I know the battery pack is being brought up to temp, but this seems crazy high, and I have not noticed it before.

    I just did a 25 mile trip at an average of 336 Wh/mi and again never went over 60. Most of it was in traffic poking along under 20mph. I watched myself the entire trip and never accelerated hard, or even spirited. I know that 336 Wh/mi is "not bad", but based on recent activity it just seems like something is not quite right.

    Tires are at 42psi, as always, range mode off, as always in my case, cabin temp at 72 this morning - which matched outside temp, so it was running at very low speed.

    Anyone else have something like this and then have it resolved by a service visit.
     
  2. jerry33

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

    Joined:
    Mar 8, 2012
    Messages:
    12,743
    Location:
    Texas
    That's the problem. 20 mph is not an economical speed and there was probably a lot of slowing down and speeding up (aka yo-yoing)
     
  3. tnt1971

    tnt1971 Member

    Joined:
    Feb 5, 2016
    Messages:
    98
    Location:
    United States
    I notice the first mile or so always has much higher power usage. This is true in warm weather even when I pre-cool the car while plugged in. I generally have to go 5 miles or so before the average power usage for the trip falls below 400wh/mile. The winter is far worse.
     
  4. Camera-Cruiser

    Camera-Cruiser Fully Charged

    Joined:
    Dec 4, 2015
    Messages:
    424
    Location:
    Fullerton, CA
    No, I was intentionally not yo-yoing, and really rolling the power on smoothly. I do understand about the pac coming to temperature, it has just seemed off. I just did the exact same 25 mile trip as I did in the morning (child school pick-up loop) and I was nearly 400wh/mile after the car had been just driven by my wife. So it just seems off.

    I may just call the 800 number and have them look at my logs.
     
  5. ThortsMD

    ThortsMD Member

    Joined:
    Nov 30, 2012
    Messages:
    255
    Location:
    Seattle
    I noticed the same thing for about the previous 4 weeks. But the last 3 days it's dropped to near normal.
     
    • Like x 1

Share This Page