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

Power drain while idle (Vampire Load)

Discussion in 'Model S: Battery & Charging' started by dennis, Nov 10, 2012.

  1. neroden

    neroden Happy Model S Owner

    Joined:
    Apr 25, 2011
    Messages:
    2,987
    Location:
    Ithaca, NY, USA
    You are correct in your comparisons; I am not comparing this car to the cars other people would compare it with. If I were getting a gasoline car, I would be getting a much smaller car; my actual taste is for econoboxes. :redface: The trouble is that there simply *isn't* a smaller car which is (a) a four-seater, (b) all-electric, and (c) has a real-world cold-weather range long enough to handle my trips, out here where it's 70 miles to some of our doctors' offices (specialists' offices). This year's Leaf can't even handle cold weather well. Next year's Leaf should be better and should have (a) and (b), but still not (c). I don't see suitable (long-range) electric econoboxes becoming available before Tesla's GenIII, thanks to the idiocy of the major car companies. (I think a Leaf with a 200-mile range would be flying off the lots even at high prices.) I also don't see a network of Superchargers showing up here for 4-5 years, either.

    And dammit, I want OFF of gasoline SOON! :scared:

    Basically, I'm paying a whole lot extra in order to get an electric car 4-5 years before the "perfect electric car for me" becomes available. (The extra cost for the Signature was too much for me; I decided I could wait another year. But another 5 years? Too long!) The main point against the Model S as a car, for me, is simply that it *is* a large car. I'm mentally trying to justify the oversized car by saying "Well, but see, it's great in every *other* way..." :love: ... so any flaws which show up how uneconomic my pure-electric choice is, make me sad. :crying: (This is also why I'm much, much happier to be further back in the production line rather than having the Signature reservation I had; I would not have been happy with a buggy, incomplete car, or with repeatedly calling the rangers out, 400 miles from the nearest service center. Showing off a nice, complete, car with the bugs worked out makes the extra cost a lot more justifiable in my head. :biggrin:)

    Now, back to the topic. 700 watt-hours/day? :love: That makes vampire load a non-issue. I saved more than that by switching to LED lights in my house. I can leave the car unplugged for a month and have 150 miles of charge. :tongue: Nothing to worry about here. :cool:
     
  2. Rodolfo Paiz

    Rodolfo Paiz P85 "Plug and Play"

    Joined:
    Nov 19, 2012
    Messages:
    665
    Location:
    Miami, FL
    Thanks for the additional detail, I understand perfectly now. :)
     
  3. ddruz

    ddruz Member

    Joined:
    Mar 17, 2012
    Messages:
    672
    Location:
    North Shore Oahu, HI
    Do car owners who have received the recent software update feel that the vampire load issue has been sufficiently addressed with the sleep mode option? Thanks.
     
  4. bosgig

    bosgig Member

    Joined:
    Apr 12, 2012
    Messages:
    167
    Location:
    Metro Boston
    There are tons of J1772's but unfortunately they're not very practical unless you can leave your S plugged into one overnight. For charging on the go, they're just too slow (in the Northeast, anyway). And charging overnight? If they're at the hotel, great, otherwise. . .not sure I'd leave my car in some random parking lot. Which is why I hope Tesla continues to build out the supercharger network beyond what they've shown.
     
  5. bosgig

    bosgig Member

    Joined:
    Apr 12, 2012
    Messages:
    167
    Location:
    Metro Boston
    Back on topic. . .and apologies if this is a dumb question. Unless I change my habits, the place where I'll leave my key fob will be within about 20 feet of the steering wheel of my Model S as it rests in my garage. I'd imagine I'm not alone in this. Does leaving the fob within "range" affect the vamp load? Will leaving it that close have any other practical impact on the car since it will "sense" it continuously?
     
  6. Robert.Boston

    Robert.Boston Model S VIN P01536

    Joined:
    Oct 7, 2011
    Messages:
    7,842
    Location:
    Portland, Maine, USA
    I believe that the car should still shut down after two hours. To insure that my car locks when parked at home, however, I'm considering getting an RF-shielded pouch to store the key inside; or perhaps easier and cheaper, toss my keys in a fabric-lined can.
     
  7. Zextraterrestrial

    Joined:
    Mar 11, 2010
    Messages:
    3,571
    Location:
    Humboldt/Los Altos
    I think it is Too far away for recognition of the RFid - it is more like 10-15 feet that it recognizes it. You could always leave it in a small faraday cage?
     
  8. bosgig

    bosgig Member

    Joined:
    Apr 12, 2012
    Messages:
    167
    Location:
    Metro Boston
    Ideally I'd leave it unlocked, but not if that means the vamp load goes up. So if I leave the fob out of range or if I use any kind of shielded bag, etc., I'm locking the car. This is a dilemma. . .unless, of course, keeping the fob in range doesn't affect the vamp load. Then I'll just leave it closer. Hmmm. . .well, I guess if this is my biggest dilemma I'm doing pretty well.
     
  9. Robert.Boston

    Robert.Boston Model S VIN P01536

    Joined:
    Oct 7, 2011
    Messages:
    7,842
    Location:
    Portland, Maine, USA
    Autolock is an option you can toggle. Unfortunately, it doesn't have a location-specific setting (autolock unless in the garage).
     
  10. strider

    strider Active Member

    Joined:
    Oct 20, 2010
    Messages:
    2,882
    Location:
    NE Oklahoma
    Well, you don't have to turn on walk-away locking.
     
  11. bosgig

    bosgig Member

    Joined:
    Apr 12, 2012
    Messages:
    167
    Location:
    Metro Boston
    Good point. Not actually having mine yet, I lose track of what is customizable and what isn't!
     
  12. brianman

    brianman Burrito Founder

    Joined:
    Nov 10, 2011
    Messages:
    15,231
    Page 9 from the online Quick Guide:
    DoorsAndLocks.jpg
     
  13. eledille

    eledille TMS 85 owner :)

    Joined:
    Jan 13, 2010
    Messages:
    535
    Location:
    Oslo, Norway
    I think shutting down after two hours is way too long. If it really boots up before I can get my seat belt on, I would want it to shut down almost immediately. I'd love to be able to adjust that timer.
     
  14. bosgig

    bosgig Member

    Joined:
    Apr 12, 2012
    Messages:
    167
    Location:
    Metro Boston
    For those who care about this, here's Tesla's response:

    "Realistically if you leave your key fob within a sensor range of the vehicle, you will increase the standby drain because the car will not be able to enter sleep mode. Sleep mode is the newest software update on Model S. Model S will power off the display and vehicle electronics each time you exit, transitioning to a “sleep” state. When you return to Model S, you’ll note a modest increase in the time it take the touch screen and instrument panel to wake from this energy-saving state.

    Model S will initiate the startup process the moment the key is recognized nearby. You can only begin driving once both displays are ready. Note that keeping the displays powered will reduce your car’s range up to 8 miles per day when the car is not plugged in, and will also reduce the life of your 12 v battery and vehicle electrical systems. If displays are set to power off, the displays will power off 2 hours after the rest of the car goes to sleep. The Displays will also power off when the battery charge is low (or after 60 hours without use), regardless of the setting."
     
  15. MikeK

    MikeK R#129, TSLA shareholder

    Joined:
    Jun 29, 2012
    Messages:
    1,133
    Location:
    San Francisco Bay Area
    Okay, this needs asking: what the heck do they mean when they say that it will reduce the life of the "vehicle's electrical systems"?!
     
  16. jerry33

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

    Joined:
    Mar 8, 2012
    Messages:
    12,447
    Location:
    Texas
    Presumably, they mean that electronic components have a certain MTBF (mean time between failures) measured in hours at a given temperature. If you have them on 24 hours a day they won't last as many days compared to having them on only two hours a day. This is particularly true in the hotter areas because electronic components have a shorter life as their temperature rises.
     
  17. pilotSteve

    pilotSteve Member

    Joined:
    Jul 14, 2012
    Messages:
    542
    Location:
    Vancouver WA
    I believe they are specifically calling out the 12V battery as that is what keeps some of the computer(s) alive. By not sleeping there are more and deeper charge/discharge cycles on the 12V battery.
     
  18. tezco

    tezco Sig P85

    Joined:
    Nov 9, 2012
    Messages:
    817
    Location:
    Colorado
    Sounds to me that Tesla needs to increase the frequency that the 12V battery charges off the main pack when the car is not asleep, or install a larger deep cycle battery. Too many reports of battery failures in the first couple of months the car has been out.
     
  19. dennis

    dennis P85D

    Joined:
    Jul 26, 2012
    Messages:
    961
    Location:
    Silicon Valley CA
    OK, I am confused. I am on sw version 1.15.14. I assume that is the latest version.

    My car still loses 10 mile range per day. I have gone through all of the "settings" screens and can't find anything for "sleep mode", so I assume it is automagic.

    So is the sleep mode referenced in Tesla's response above in a future software version that is not yet released? :confused:
     
  20. dsm363

    dsm363 Roadster + Sig Model S

    Joined:
    May 17, 2009
    Messages:
    18,220
    Location:
    Las Vegas, NV
    There is one version newer than yours (they're calling if Version 4.0 but it's actually v1.17.50)
    Model S software/firmware changelog - Tesla Motors Club - Enthusiasts & Owners Forum
     

Share This Page