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

Questions about charging in "charge stopped mode"

Discussion in 'Model S: Battery & Charging' started by xradr, Nov 24, 2013.

  1. xradr

    xradr Member

    Joined:
    Apr 12, 2013
    Messages:
    18
    Location:
    SF Bay Area
    Hi All,

    I did a search on this, but wasn't able to find an answer. Does anyone know the precise state of the car when you are in "charge stopped" mode. More specifically, when the car is plugged in, but charging is stopped (manually and the charge port color is blue), will the car draw any power for various management features (battery temp regulation, communications, etc)? As I recall, AC/Heat should be running off wall power when plugged in right?

    If not, is there any value in plugging the car in even if you're not charging specifically (or have manually stopped charging)?

    If so, do you know what the uses are and what the (very) approximate wattage used per day? (bat temp management will likely depend on external temps, etc).

    Thank you sincerely for any input/expertise.

    GO TESLA!!!!
     
  2. montgom626

    montgom626 Active Member

    Joined:
    Dec 15, 2012
    Messages:
    1,339
    Location:
    USA
    Always plug your car in. Will save the main battery if you are gone for any length of time. Mine charges very two days and uses about 4-5 kW every 2 days to replace vampire losses. I am on FW 5.8
     
  3. mknox

    mknox Well-Known Member

    Joined:
    Aug 7, 2012
    Messages:
    8,570
    Location:
    Toronto, ON
    If you use the mobile app to pre-condition the car, or get in and turn on the HVAC, it will begin drawing shore power. The charge port will blink green and the UMC will indicate current flow.

    - - - Updated - - -

    Interesting. Mine did the exact same thing on 4.5 last summer when I was away. I thought 5.8 would have reduced this requirement somewhat with its Energy Saving features.
     
  4. montgom626

    montgom626 Active Member

    Joined:
    Dec 15, 2012
    Messages:
    1,339
    Location:
    USA
    My impression is that 5.8 has reduced vampire loss (standby loss) by 25-30%%. Not as much as I wanted, but better.
     
  5. mknox

    mknox Well-Known Member

    Joined:
    Aug 7, 2012
    Messages:
    8,570
    Location:
    Toronto, ON
    Well, not if you're still seeing 4-5 kW of "top up" every other day. That is exactly the amount I used to see on 4.5.
     
  6. xradr

    xradr Member

    Joined:
    Apr 12, 2013
    Messages:
    18
    Location:
    SF Bay Area
    Thanks sincerely for the input/guidance.
     
  7. Benjamin Brooks

    Joined:
    Jan 21, 2013
    Messages:
    444
    Location:
    San Jose, California, United States
    Perhaps the car never goes to sleep when plugged in?
     
  8. mknox

    mknox Well-Known Member

    Joined:
    Aug 7, 2012
    Messages:
    8,570
    Location:
    Toronto, ON
    Mine seems to sleep while plugged in based on the fact that the mobile app has to "wake up" the car before connecting. It never sleeps while in a charge cycle which I guess makes sense.
     
  9. Dreamin

    Dreamin Member

    Joined:
    Aug 7, 2013
    Messages:
    165
    Location:
    SoCal
    Have the similar question as OP. Not sure I understand the issue with leaving it unplugged and plugging in/topping off every 2 days - exactly what the car does, just to it manually.

    I can't leave my car plugged in 24/7 due to multiple cars/garage/driveway layout.
     
  10. jerry33

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

    Joined:
    Mar 8, 2012
    Messages:
    12,766
    Location:
    Texas
    I believe the only real difference is that the car doesn't forget.
     

Share This Page