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Is it better to charge few miles everyday or all in one shot?

Discussion in 'Model 3: Battery & Charging' started by gujudog, Jul 25, 2018.

  1. gujudog

    gujudog Member

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    We have access to charger at work and can charge to top off everyday or let it run down to about 30% and charge all day. What would be better in long run or it doesn't matter really as long as the car isnt charged to 100% all the time and run down to 0%.
     
  2. TexasEV

    TexasEV Well-Known Member

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    I would encourage you to RTFM, which has the answer to this and many other questions new Tesla owners have. Especially read the battery section. The short answer is plug in when you can, don’t wait until the charge gets low.

    Tesla used to pass out a card that said “A connected Model S is a happy Model S”. The same is true for a Model 3.
    A connected Model S is a happy Model S
     
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  3. jerry33

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

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    A few miles every day is best. Besides being better for the battery, starting every day with a full tank (e.g. full daily charge) means that you never worry if some emergency should come up.
     
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  4. gujudog

    gujudog Member

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    Thx for the link.. What is RTFM? Still not familiar with all the acronyms.
     
  5. brkaus

    brkaus Active Member

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    Read the friendly manual. (Is one interpretation)
     
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  6. TT97

    TT97 Active Member

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    From the manual:

    "There is no advantage to waiting until the
    Battery’s level is low before charging. In fact,
    the Battery performs best when charged
    regularly."
     
  7. Birdman325

    Birdman325 Member

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    ABC (always be charging).
     
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  8. TexasEV

    TexasEV Well-Known Member

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    LMGTFY
    RTFM | Know Your Meme
     
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  9. gujudog

    gujudog Member

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  10. Bulbski

    Bulbski Member

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    Thanks for sharing the manual.
     
  11. TT97

    TT97 Active Member

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    Wait, was does LMGTFY mean? Can someone Google it for me?
     
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  12. tga

    tga Supporting Member

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    #12 tga, Jul 25, 2018
    Last edited: Jul 25, 2018
    Charging is like voting. Do it early and often.

    Edit for more useful info:
    On a serious note, if you're only driving a few miles a day (which I'm guessing is the case if you can go multiple days without charging), your battery will last longest if you keep it close to 50%.

    If you need 10%/day, you can:
    1. Charge weekly to 90%, drive down to 20%, then repeat.
    2. Charge daily to 90%, drive down to 80%, then repeat.
    3. Charge daily to 55%, drive down to 45%, then repeat.
    #3 is best for battery longevity. It does mean you may have an issue if you need to do on a sudden unexpected trip.

    Generally, I charge my S to 60-70% overnight. I go higher if I have a trip the next day, but I have a local supercharger if an unexpected need arises.
     
  13. TexasEV

    TexasEV Well-Known Member

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    Unnecessarily complicated for mainstream owners. There may be statistically significant difference in battery experiments with different charge levels, but no one has shown any meaningful difference in range with the Model S after many years regardless of usual charge level within the daily range.

    Owners shouldn’t have to think about the battery or what charge they will need the next day. Just set it to 90% and leave it there unless you’re going out of town.
     
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  14. tga

    tga Supporting Member

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    True. I didn't mention that I'm unnecessarily anal about this stuff...

    OTOH, I wonder how many people on an enthusiast car forum count as "mainstream." ;)
     
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  15. Thunder7ga

    Thunder7ga Member

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    I use 50% of my battery every work day.....so I charge to 80% overnight and by the time I get home she's at ~30% and I repeat.
     
  16. paulvinh

    paulvinh Member

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    Charge to 90% everyday. I drive 70mi per day for work. Wondering if I should set it to 80% ?
     
  17. 1.21GW

    1.21GW Member

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    yes, 80% would be better
     
  18. electracity

    electracity Active Member

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    Probably, unless you tend to be forgetful.
     
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  19. SSedan

    SSedan Member

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    Model 3 is new enough nobody is thinking about it but wear on the port and the charging device plug can come into play.

    I think the newer cars can charge the 12volt from the wall and might reduce diachadis cycling which would be a reason to keep it plugged in.
     
  20. TexasEV

    TexasEV Well-Known Member

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    What do you mean by “better”? Is it that in 10 years you might see a difference of a mile or two in range? Because regardless of what you read about battery experiments, in the real world of Tesla driving there hasn’t been any meaningful difference in battery degradation seen after five years of people typically charging to 80% or 90%.

    My Model S only lost 5% of range after 5 years of daily charging to 90% and charging to 100% many times for trips. You’re not going to do better than that.

    The early Model S firmware only had two settings, 92% for daily and 100% for trip. The slider giving the ability to lower the daily setting exists because of stupid EPA policy of averaging a daily and trip range together— so if there aren’t two settings, there’s nothing to average and Tesla got to advertise the 100% range.
     

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