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

Battery Charging

Discussion in 'Model 3' started by Chirojan, Oct 18, 2019.

  1. Chirojan

    Chirojan Member

    Joined:
    Jul 17, 2019
    Messages:
    23
    Location:
    Miision Viejo, Ca
    I generally charge to 85%. 2019 3 Standard+
    Each Sunday I drive to see my parents uses 180 mileage equivalent. So Saturday night I fully charge before the trip. Is there a best way to do this?
    Also Is there a problem leaving the cord in the 220 line?
     
  2. gecko10x

    gecko10x Member

    Joined:
    Jan 22, 2018
    Messages:
    265
    Location:
    WV
    The best way would be to calculate the time to charge to full (personally, I'd just do 95-98%, as that last couple will take longer and get you almost nothing), then time it so it finishes charging just when you leave. Leaving the battery sitting at full isn't good for it (worse in higher ambient temperature).
     
    • Helpful x 1
  3. Chirojan

    Chirojan Member

    Joined:
    Jul 17, 2019
    Messages:
    23
    Location:
    Miision Viejo, Ca
    Good point. Thanks
     
  4. jamnmon66

    jamnmon66 Member

    Joined:
    Apr 10, 2018
    Messages:
    572
    Location:
    Brighton, CO
    +1 follow gecko10x's advice. Time the charging so that it finishes right before you leave home.

    The issue isn't so much that you're charging to 100%. It's the amount of time that it sits fully charged.
     
  5. NickFie

    NickFie Member

    Joined:
    Sep 28, 2017
    Messages:
    447
    Location:
    Near Philadelphia, PA
    I charge to 90% overnight. Then set limit to 100% when I wake up, start charging again.

    Charge completes during shower, breakfast, car packing. Battery is also warmed up for the trip.

    No problem leaving connector plugged in when car is not charging.

    Also, in cold weather, turn on cabin heat while car is plugged in. More efficient than pushing power into battery, then pulling it out to heat the car. Also leaves more juice in the battery for later.

    Finally, I think occasionally completely charging to 100%, until charging completes, is good. Allows battery management system to completely balance the packs. Obviously, set off on your trip very soon after the full charge.
     
    • Like x 3
    • Helpful x 1
  6. 5_+JqckQttqck

    5_+JqckQttqck Active Member

    Joined:
    Apr 27, 2018
    Messages:
    1,851
    Location:
    Toronto
    Take the charger with you and charge at the destination. It'll get you maybe 30miles of buffer and keeps the battery happy.
     
  7. Chirojan

    Chirojan Member

    Joined:
    Jul 17, 2019
    Messages:
    23
    Location:
    Miision Viejo, Ca
    Thanks all. I did not understand about not leaving the battery fully charged
     
  8. dhrivnak

    dhrivnak Active Member

    Joined:
    Jan 8, 2011
    Messages:
    4,309
    Location:
    NE Tennessee
    No problem leaving the 240 cord plugged in. It is the plugging and unplugging that causes issues. And i know of no way to automatically do a full charge just in Friday’s. So just try to remember the day before. Set a phone reminder and set via the app.
     
  9. captn_bob

    captn_bob Member

    Joined:
    Jan 8, 2020
    Messages:
    14
    Location:
    Corvallis
    What is better to do .
    I commute daily about 35 miles per day round trp.
    Is it better to charge it up every day (to 90%) or better to wait to charge it after it runs down to a certain level.
     
  10. frankusb

    frankusb Member

    Joined:
    Jan 2, 2019
    Messages:
    47
    Location:
    Texas
    I have a similar situation, I charge to 60%. The battery life is best around 50%. 55% might be more optimal for me.
     
  11. Sparkler

    Sparkler Member

    Joined:
    Jun 25, 2019
    Messages:
    19
    Location:
    California
    Wow - I'm not as fastidious as that. If we're going some distance on the weekend I simply change the charge level from my iPhone in the evening and it's fully charged by morning. Unplug and go. Are these batteries really that delicate?
     
  12. Knightshade

    Knightshade Well-Known Member

    Joined:
    Jul 31, 2017
    Messages:
    10,628
    Location:
    NC

    No. They're not.

    Set charge limit to 80 or 90 percent.

    ALWAYS plug it in when home (user manual even says to do this)

    Also change the displayed range to % so you don't waste 50 posts freaking out about how it says you have 3 miles more or less range this week than last as some folks do. You'll thank me later.
     
    • Like x 1
  13. ElectricIAC

    ElectricIAC Devil’s Advocate

    Joined:
    Dec 31, 2019
    Messages:
    2,123
    Location:
    DFW
    They’ve designed these cars to set it and forget it at 80-90% I mean I suppose in theory you could make it last longer overall if you micromanage 50-70% like some do but chances are you will trade/sell/wreck the car before some minute difference in battery life rears it’s ugly head.

    Make it a habit to plug in whenever it’s convenient and be happy!
     
    • Like x 2
    • Disagree x 1
  14. Wennfred

    Wennfred Supporting Member

    Joined:
    Apr 4, 2019
    Messages:
    2,803
    Location:
    San Diego
    From reading these forums on battery degradation, those that charge to 70% are seeing a range lost as the battery’s memory thinks it suppose to be that low. Then they have to do the 3x 10% to 100% calibration which is a pain if you don’t have a Supercharger nearby.

    SR+ .... Ive charged at 90% daily, battery still shows 239-240 at 100%. 11 months 14,900 miles

    Fred
     
    • Like x 1
  15. Knightshade

    Knightshade Well-Known Member

    Joined:
    Jul 31, 2017
    Messages:
    10,628
    Location:
    NC

    That's not a loss of range- that's the reported range being inaccurate.

    (it's another good reason to change the display to just be % and stop worrying about it)
     
    • Like x 2
  16. sdorn

    sdorn Director of Awesome

    Joined:
    Oct 9, 2016
    Messages:
    938
    Location:
    Georgia
    I had my Model S for 3 years. Max range dropped from 318 brand new to about 308 by the end of my lease. I had about 30,000 miles on it over that time. I always charged to 90% every night and charged to 100% probably 30 - 40 times while I owned it. I usually would charge to 98% the night before a trip and then set it to 100% about 30 minutes before I left so that it would be absolutely maxed out when we left on the trip.

    I am treating my M3 the same. I charge to 90% every day and have charged to 100% once when I had a lot of driving to do one day. I expect it to do even better than my MS given the battery and software improvements over the past 3 years.
     
    • Helpful x 2
    • Like x 1
  17. XLR82XS

    XLR82XS D M C

    Joined:
    Jul 26, 2019
    Messages:
    2,836
    Location:
    SWFL | Vegas
    Amen. I plug in all the time at home when not in use and SOC 90% daily - 100% trips over 2 hours. I follow recommendation from the manual and enjoy without worries.
     
  18. SomeJoe7777

    SomeJoe7777 Marginally-Known Member

    Joined:
    Mar 28, 2015
    Messages:
    2,121
    Location:
    Houston, TX
    If need to charge to 100% and know when you're leaving, use the scheduled departure feature in the charging menu, and set the time the night before. The car will complete the 100% charge right as you want to leave, and will also have the cabin conditioned for you.

    This will reduce the time that the battery spends charged to 100% to a minimal amount.
     
  19. Knightshade

    Knightshade Well-Known Member

    Joined:
    Jul 31, 2017
    Messages:
    10,628
    Location:
    NC
    Unless you want to leave after 6 AM.

    Because it stops at 6 AM no matter what departure time you set.
     
    • Like x 2
  20. PianoAl

    PianoAl Member

    Joined:
    Dec 15, 2019
    Messages:
    682
    Location:
    Far Northern California
    You can actually let the car calculate it. Plug it, set it to charge immediately, note how long it says it will take, then set it to charge at a later time.

    The "Set departure time" is fine, except that currently, it won't honor a departure time after 6 AM.
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC