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

2018 MX - Charging

Discussion in 'Model X' started by bayx, Sep 14, 2018.

  1. bayx

    bayx Member

    Joined:
    Jul 29, 2018
    Messages:
    294
    Location:
    San Francisco
    Would you charge your MX to 90% or only 80%? In my case, I can only charge at supercharging stations and I am doing 90% and don't let it go below 20%.

    Just curious to know what others think is the best thing for the battery?
     
  2. Rockster

    Rockster Active Member

    Joined:
    Oct 22, 2013
    Messages:
    1,941
    Location:
    McKinney, TX
    Lithium ion batteries are happiest at 50% state of charge. Ideally your driving would bracket 50% as closely as possible (e.g., if you use 40% in a day, charge it to 70% and drain it to 30%). So, if you don't have to charge it to 90% then charge it to 80%.

    That said, there's evidence to suggest that optimizing battery usage in this way provides very slight longevity benefits, at best, and it's quite good enough to simply not charge above 90% unless you need to for a trip and when charging to 100% don't let the car sit at 100% for very long.
     
    • Helpful x 1
    • Informative x 1
    • Like x 1
  3. TexasEV

    TexasEV Well-Known Member

    Joined:
    Jun 5, 2013
    Messages:
    6,859
    Location:
    Austin, TX
    Charge it to 90%, as that will be more convenient for you without home charging, and don’t worry about it. There is no practical difference over a reasonable number if years, even though tests may show a statistically significant difference. If a few miles of range after many years matters to you, then you bought the wrong car.

    As one data point, my Model S only lost 5% of range after 5 years, when charged to 90% nightly and to 100% for trips. You’re not going to do meaningfully better than that by charging it less.
     
    • Informative x 1
    • Like x 1
  4. DCGOO

    DCGOO Member

    Joined:
    Nov 24, 2015
    Messages:
    712
    Location:
    Indianapolis, IN
    I also would not worry about staying above 20%. Obviously you need to stay above 0, but 20% is a lot to leave on the table.
     
    • Like x 2
  5. Darksoldier360

    Joined:
    Dec 17, 2017
    Messages:
    99
    Location:
    SF Bay Area
    Agree, wouldn't leave it empty for days, but no issue rolling into a super charger with 5% left in my experiance.
     
    • Like x 2
  6. puritan

    puritan Member

    Joined:
    Apr 7, 2018
    Messages:
    45
    Location:
    SF Bay area
    Interesting data point to consider:

    Tesloop of Los Angeles have a 2016 MX that was supercharged to 100% on a daily basis and is approaching 300,000 miles.

    Total range loss? 10%.

    I think that is possibly the worst case charging scenario of any Tesla, probably ever.
     
    • Informative x 1
    • Like x 1
  7. Anzir

    Anzir Supporting Member

    Joined:
    Nov 9, 2012
    Messages:
    609
    Location:
    Central Florida
    Aren't you concerned Tesla is going to start throttling you back with excess usage of the superchargers?
     
  8. cwerdna

    cwerdna Active Member

    Joined:
    Jul 11, 2012
    Messages:
    2,064
    Location:
    SF Bay Area, CA
    On the flip side: Tesloop’s Tesla Model S Surpasses 400,000 miles (643,737 kM)

     
    • Informative x 1
  9. bayx

    bayx Member

    Joined:
    Jul 29, 2018
    Messages:
    294
    Location:
    San Francisco
    I have no choice but to use supercharging stations until a while.
     
    • Love x 1
  10. jboy210

    jboy210 Supporting Member

    Joined:
    Dec 2, 2016
    Messages:
    544
    Location:
    California
    Unless you need the range, I would shoot for 80%. The charge rate drops off quickly as the battery get's charged. 20-40% is much faster than 70-90%. 90-100% takes forever and you lose brake regen after 93% or so.

    BTW, where are the superchargers in the City? Do they have urban Superchargers?
     
    • Informative x 1
    • Like x 1
  11. tpham07

    tpham07 Active Member

    Joined:
    Mar 21, 2017
    Messages:
    1,830
    Location:
    Baton Rouge
    Not an issue. only happens in maybe 1 out of 500 owners who excessively supercharge, and only adds 10-15 mins tops to charging.
     
    • Like x 2
  12. ChuckG

    ChuckG Member

    Joined:
    Aug 6, 2017
    Messages:
    10
    Location:
    San Diego
    San Diego has an urban supercharger station downtown.
     
  13. Seattle Tom

    Seattle Tom Member

    Joined:
    Mar 31, 2016
    Messages:
    300
    Location:
    Seattle, WA
    I started with 90% daily charging when I got my X last summer, but didn’t need it and then stumbled on the article below from Electrek. I trust the battery experts more than the randos on the forum, like me! :)

    Tesla battery expert recommends daily charging limit to optimize durability

    Based on the article, I went to an 80% daily charge - not quite the 70 recommended, but close enough.

    I’ve had the X for a year and two months and have 22K miles on it. I charged up to 100% for a golf trip three weeks ago and had full range of 295 miles. I know the rated miles displayed on the instrument cluster is not a true indicator of battery loss, but my experience has been positive enough that I’d encourage anyone who wants to be proactive to charge less than 90% if you don’t need it.

    Oh, I’ve supercharged for a road trip from Seattle to Los Angeles and back, plus a golf trip last summer too. Besides that...and maybe a few other instances I’m forgetting for short trips, it’s been all home (slower) charging. Good luck!
     
    • Informative x 1
  14. Leo Snow

    Leo Snow Member

    Joined:
    Jun 27, 2018
    Messages:
    46
    Location:
    Ontario
    I charge it up to 90% all the time for my regular commute and 100% for road trips.
    Stop overthinking of your car, it's just a car and there is no difference that you'd notice between charging it to 80 or 90%.
     
    • Informative x 1
    • Like x 1
  15. outie

    outie Active Member

    Joined:
    May 22, 2016
    Messages:
    2,370
    Location:
    SoCal
    So they not only take up the local SpC spaces for commercial purposes, they also spend an extra hour on the already-congested stations to charge the last 10% to 100%? Pathetic.
     
    • Disagree x 1

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