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Best way to eliminate limited regen dots? (from cold weather)

UnknownUnknown
edited November -1 in Model 3
Warm the cabin without being plugged in. That's the answer.

For my cold climate people who hate limited regen give this a try for 30-45 minutes if you can spare the range. I've been amazed at what it does.
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Comments

  • gballant4570_98238076gballant4570_98238076
    edited February 2020
    I'm gonna say the best way is to park in a heated building.
  • UnknownUnknown
    edited November -1
    I should add.....These are my normal options;

    1. Charge for 60 minutes at 29MPH
    2. Warm the cabin for 60 minutes
    3. Warm the cabin + charge for 60 minutes

    I've found warming cabin without being plugged in does way better at warming the battery than the above 3 options.
  • Proverbs327Proverbs327
    edited February 2020
    I have found this is really dependent on how cold it is and how long the car has been sitting. I have pre heated the car and drove home for 40 minutes with the snow flake icon on the whole time. For reference it was -24c outside.

    I do this at the gym though. Pre heat for 20-30 minutes and if it’s not deathly cold out, I do get enough regen to feel it.

    Charging for 1-2 hours before I leave home seems to be the best though. I can get about half revenue even in the really cold days. Doesn’t beat supercharging though.
  • UnknownUnknown
    edited February 2020
    haha, yes @gb that would probably beat all my current options :)
  • gballant4570_98238076gballant4570_98238076
    edited February 2020
    I am thinking about heating the building I park and charge in - only partly for these reasons. The other reason is to make the upstairs of the bldg a music room, which should keep the lower level warm enough to make it a great place to park & charge.
  • FISHEVFISHEV
    edited February 2020
    Or just drive and use the regen to warm the battery. My car cold soaks every night and I have about half my regen left in the 35F AM, enough to make it usable and the using it heats the battery.

    Sounds like big waste of energy to boost the regen otherwise.
  • Proverbs327Proverbs327
    edited November -1
    35f isn’t cold though. Maybe that’s why.
  • FISHEVFISHEV
    edited November -1
    "35f isn’t cold though."

    Cold enough to knock out 50% of regen. Even if its so cold as to eliminate all regen, just drive and let the regen and cabin heat recover the regen vs. burning a huge amount of energy to get regen back, counter productive as you will likely never regain the energy you used to free up the regen.
  • derotamderotam
    edited February 2020
    Mike UpNorth, it's all about whether the car goes to actively heat the battery or not. I dont think it matters whether you are plugged in or not. Activating the cabin heating from the phone app will engage battery preheating(temperature dependent of course).
  • bpr1debpr1de
    edited February 2020
    For a car parked outside and/or not plugged in, driving the car is the best way to recover regen in the winter.
  • Proverbs327Proverbs327
    edited February 2020
    @fishev

    But when it’s actually cold, driving doesn’t work. Tried it. You’ll have zero regen and you’ll have the snow flake icon.

    Went out to dinner, it’s was -24c. Car was parked for a little over two hours. Pre heated for 20 minutes and drove almost all highway home for 40 minutes. Cold icon still there with zero to no regen. Also had no heat, not sure why.

    In my experience, it depends on how cold it is outside.
  • FISHEVFISHEV
    edited February 2020
    "Also had no heat, not sure why."

    Recirc not on and just not enough heater to over come -24C temp. air?

    Seems foolish to blow 4kWh/16 miles of range, sorely needed at -24C temps, just so you don't have to use the brakes.
  • Proverbs327Proverbs327
    edited February 2020
    “Recirc not on and just not enough heater to over come -24C temp. air?“

    Ah. Ya I don’t use recirc.

    And yes, heating your car just to have regen is dumb. I do it so I’m not freezing my ass off when I get into the car. Getting regen from it is a bonus. Plus I’m so accustomed to regen, when I don’t have it (driving my ice vehicle) I forget how to drive.
  • UnknownUnknown
    edited November -1
    @gb Planning on partially finishing my garage for pretty much the same thing. A warmer home for the car.

    @fish Yes, it is a waste of energy. But I like Regen. And I have home charging set up so I can do what I prefer. Unlike your weird ass.
  • UnknownUnknown
    edited February 2020
    @derotam

    That thing you have, the CANbus, can you run a test and see if cabin warming plugged in or not makes a difference to battery temp/regen dots?
  • UnknownUnknown
    edited February 2020
    @derotam

    I wouldn't think being plugged would make a difference either. But I've warmed without being plugged in a few times this past week and its crazy how much more regen I get.
  • Proverbs327Proverbs327
    edited February 2020
    Mike UpNorth_ | February 17, 2020
    @derotam

    I wouldn't think being plugged would make a difference either. But I've warmed without being plugged in a few times this past week and its crazy how much more regen I get.


    When I do this it causes my car to charge from the range loss it had sitting. I thought this was what was giving me the regen? You think it’s just heat?
  • FISHEVFISHEV
    edited February 2020
    " Yes, it is a waste of energy."

    And then some as you are burning more energy via heating so you save a little energy gained via regen. Kind of like turning the AC on so you can have a fire in the fireplace.
  • teslamazingteslamazing
    edited February 2020
    Another thread hijacked by fish derailing it off topic. Wow!
  • teslamazingteslamazing
    edited February 2020
    Not sure if OP was asking what the most “efficient” way was or simply what ways ...
  • teslamazingteslamazing
    edited February 2020
    If your not wanting efficient, I noticed setting the nav to closest SC for precondition gives you full regen pretty quick.
  • Ron.Olsberg_98061442Ron.Olsberg_98061442
    edited February 2020
    If range is not needed, conditioning the cabin/traction battery should warm the battery quicker NOT plugged into shore power because of the battery heat generated from discharging the traction battery; however, doing so hundreds of time is going to reduce the traction battery life somewhat, ie more charge/discharge cycles. I have seen the traction battery cells warm 1-2F in about four hours when the car is awake drawing about 200W from the battery; therefore, if you were drawing 7KW to supply power to the stator windings in two motors and heating the cabin at say an average of 3-4KW would generate a fair amount cell warming due to 11KW power draw from the battery.
  • FISHEVFISHEV
    edited February 2020
    " I noticed setting the nav to closest SC for precondition gives you full regen pretty quick.

    Regen typically kicks in about 10 miles from SC so unless the SC is close by, that strategy won't work.

    Having a user activated "Battery Heater" would be great so that it could be turned on by driver if he wanted to get regen back or heat battery going to charger. It could have an auto-off after 10 minutes.
  • teslamazingteslamazing
    edited February 2020
    Keep forgetting I have the luxury of having 4 SCs in a 10-15 mile radius in our town.
  • UnknownUnknown
    edited February 2020
    @ron

    Somewhat over my head but sounds like my OP is right! I'm finally right about something on this forum....shocker!
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