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Weird charging problem

Discussion in 'Model X: Battery & Charging' started by Simon_elf, Jan 1, 2017.

  1. Simon_elf

    Simon_elf Member

    Joined:
    Jan 1, 2017
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    Location:
    Yorba Linda
    Just had my model x for 2 weeks. Today started to charge at 5pm with 90 miles left. 4 hours past. I checked my phone around 10pm. It shows 70 miles range left. It is DECREASING! Do anyone encounter this before? I am using a nema 5-15 plug.
     
  2. MXWing

    MXWing Active Member

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    Oct 13, 2016
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    Location:
    California
    I recommend you go to 40AMP charging right away. It will cost around 300-400 for an electrician to install it but I think its well worth it.

    Go check the car.. I don't think driving range should decrease. I've seen my MX not want to take the full 48AMPS and charge 'slower' but never backwards battery. :)
     
  3. Simon_elf

    Simon_elf Member

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    Location:
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    Yes. Just moved to a new house and need wrap it up. Have a solar home with solar city, now part of tesla. Not sure if that will raise the cost.
     
  4. MXWing

    MXWing Active Member

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    Solar is independent of the outlet so no worries there.

    400 is the top end cost even if they have to give you new breakers.
     
  5. jdw

    jdw Supporting Member

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    Likely due to low temperatures and the battery trying to warm itself to charge and not having enough power to do both.
     
    • Informative x 1
  6. Ormond

    Ormond Member

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    Jul 10, 2016
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    Location:
    USA
    After you start charging, it's a good idea to look at your charge rate on your Tesla app or dash display. I've had times when I wasn't plugged in correctly.

    I'm not sure why your miles would go down. That doesn't sound right.
     
  7. BerTX

    BerTX Active Member

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    If it does this, that is a real bug. The car knows how much power is available to charge, and should never burn battery power to heat up for such a paltry amount of charge. It should never come out negative...
     
    • Like x 1
  8. sammyfan711

    sammyfan711 Member

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    May 30, 2016
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    134
    Location:
    Downers Grove, IL
    I park in Chicago and trickle charge in one of the garages - the trickle has always charged (3 mph on the model x) and maintained the battery no matter the temperature.

    I did leave the model S out below ten degrees once with only 19 miles and came out to a snowflake near the battery - it eventually warmed up but "consumed" 15 miles when it did. I had to crawl into IKEA and use a 30amp for an hour to continue the journey.

    Let us know if you get to the bottom of this "reverse charging" - really random thing for it to do.
     
  9. jdw

    jdw Supporting Member

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    If the battery is warm from driving when you plug it in, it will trickle charge. In my experience, if the battery is cold, it may not charge much if at all. The definition of cold can vary - I’m talking below freezing ambient temperature, but the effects of cold can start around 40-45 degrees.
     
  10. Simon_elf

    Simon_elf Member

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    Can you refer me your electrician?
    I am living in Southern California. So it is not likely because of the temperature. Twitted tesla and hope they could find why.
     

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