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 and becoming a Supporting Member. For more info: Support TMC

Cold Morning Pre-Heat?

Discussion in 'New England' started by Driver Dave, Nov 3, 2016.

?

On A Cold Morning I...

  1. Turn On Max Heat, Turn On Car

    0 vote(s)
    0.0%
  2. Turn On Heat, Turn On Car

    0 vote(s)
    0.0%
  3. Turn On Max Heat

    1 vote(s)
    8.3%
  4. Turn On Heat

    9 vote(s)
    75.0%
  5. Nothing, It'll Warm Up Soon Enough When I Hit The Road

    2 vote(s)
    16.7%
  1. Driver Dave

    Driver Dave Member

    Joined:
    Oct 10, 2016
    Messages:
    211
    Location:
    Boston, MA
    Hello Tesla New England...

    Getting some conflicting info on pre-heating car. Max or not? Turn on car or not? Do nothing?

    Feel free to check your preference in poll and leave any other background info here as well.

    Cheers!
     
  2. EdA

    EdA Model S P-2540

    Joined:
    Mar 24, 2011
    Messages:
    1,947
    Location:
    Massachusetts
    I'm not sure what you're asking, regarding turning the car on or not.
    If you use the phone app and turn the heat on 10 or so minutes before you get in the car you should be fine no? Perhaps a little longer below 32F?
     
  3. tliving

    tliving Member

    Joined:
    Mar 8, 2014
    Messages:
    732
    Location:
    New England, USA
    Here's what I do:

    1) Try to time charge end (if charging) so it ends just before I leave (AM commute)
    2) Warm up 15 minutes before via app (mostly for my own comfort)
    3) I drive highway most of the way so the pack heats up quickly.
    4) "Smart" preconditioning isn't so don't waste your time on it.
     
  4. Driver Dave

    Driver Dave Member

    Joined:
    Oct 10, 2016
    Messages:
    211
    Location:
    Boston, MA
    In the app, you can "turn on" climate, but you can also "start" the car.

    Wondering if starting the car does something that just turning on climate doesn't.

    For example, turning on climate warms up the inside of the car, but possibly starting the car will get other systems going to warm up the battery, regeneration systems, etc.?
     
  5. ArtInCT

    ArtInCT Always Learning

    Joined:
    Sep 2, 2014
    Messages:
    1,681
    Location:
    Southern Connecticut
    Like @tliving said, set your charge time to end just before you depart in the AM.
    Turn on climate to pre-heat the car 10 to 15 minutes before you depart and while on shore power, this way you do not deplete the traction battery pack.

    This works the best for me in cold weather.
     
  6. tliving

    tliving Member

    Joined:
    Mar 8, 2014
    Messages:
    732
    Location:
    New England, USA
    Start just enables driving access, it doesn't change the car's temperature or other things in any significant way.

    Just remember it takes a lot of time and power to bring up the temperature of 7000 batteries. Warming your cabin to 70 or even 80 for 15 mins isn't going to make a big difference. Charging is long sustained energy (and the heat is otherwise wasted so its a good way to use it)
     
  7. SureValla

    SureValla Member

    Joined:
    Mar 15, 2016
    Messages:
    450
    Location:
    Shelton, CT
    I'm a little confused on what your asking too. Are you saying "Should I warm up my car to avoid damaging it by driving on a cold battery?" Similar to how people used to warm up ICE engines a ways back?
     
  8. Driver Dave

    Driver Dave Member

    Joined:
    Oct 10, 2016
    Messages:
    211
    Location:
    Boston, MA
    Nope, not for damage concerns, more for:

    * Does getting things warmed up while on shore power help it use less while driving and not waste range?
    * I've heard that regenerative braking can sometimes not work until things are warmed up.
    * Just a general does getting a machine warmed up after being cold have all systems be ready to work efficiently.

    And finally:

    * Just curious to see what other people are doing as we head into winter.
     
  9. ArtInCT

    ArtInCT Always Learning

    Joined:
    Sep 2, 2014
    Messages:
    1,681
    Location:
    Southern Connecticut
    SureValla, on really cold mornings (if your S in in an unheated grarage), your main traction battery will become cold soaked which will limit your power and range to some extent and also will limit regen a great deal. If you do not preheat your pack, the pack will use the energy in your pack while you are driving to warm up the pack. This will diminish your driving range to some extent. Having RANGE MODE on will limit this use factor a bit.

    If you preheat your pack by doing your daily charge just prior to leaving the act of charging the traction battery will warm the cells and thus the pack. Also by preheating your car interior using SHORE POWER you will reduce the use of the traction battery to warm the car's interior air and seats etc.

    BTW, I am in Stratford....

    ARTinCT
     
    • Informative x 1
  10. David29

    David29 Member

    Joined:
    Aug 1, 2015
    Messages:
    892
    Location:
    DEDHAM, MA
    I agree with others who say you preheat the car using the phone app and try to time the charging so it ends shortly before you will leave. Don't "start" the car.
    And if your car is plugged in, the preheating will come from the charging circuit, not the battery. But if you want to be comfortable and do not need absolute maximum range, go ahead and preheat even if you are not plugged in.
    BTW, I am nearby, in Dedham, and my experience is that you only need a few minutes of preheating on a chilly day, but you might need the full half hour only on the coldest winter days.
    One other note: The heating system will turn on as you left it. So you might want to think about how to set the controls (auto vs manual, fan speed, recirc, etc) to get the most benefit from your preheating. The seat heaters cannot be actuated remotely, though, nor can the Defrost mode or heated steering wheel or other features. (Although the Defrost mode cannot be turned on, you can set the air flow to include the windshield.)
     
  11. Driver Dave

    Driver Dave Member

    Joined:
    Oct 10, 2016
    Messages:
    211
    Location:
    Boston, MA
    I was wondering if you did "start" the car, it would turn on some of these other things? Probably not seat heaters as they need a "seat" :)
     

Share This Page