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New Owner Question. Home charging limited to 12amps?

Discussion in 'Model 3: Battery & Charging' started by beedubyah, Aug 15, 2018.

  1. beedubyah

    beedubyah New Member

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    Greenville, SC
    Just got a Tesla home charger installed for my Model 3 (few weeks old). The electrician and I settled on bringing in 30 amps to the charger. However, when it is charging, it says that I am limited to 12 amps and I'm unable to configure it to bring in more. Shouldnt I be able to configure it to bring in more than 12amps? Any idea what's wrong?
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  2. Blue_Model_S

    Blue_Model_S Member

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    #2 Blue_Model_S, Aug 15, 2018
    Last edited: Aug 15, 2018
    I see that the voltage is 231 volts. So you are not using a regular household outlet. What kind of outlet are you using? If it is NEMA 14-50, the car has detected instability in the line and reduced the amperage. Try unplugging and plugging again and see if it starts at a higher amperage and then goes down.

    Oh on second reading, I think you may be using the Tesla wall connector. I don't have one, but I understand that there are dip switches in the charger to set the amperage. Perhaps someone else can comment or its manual may have some information.

    Page 21 in the following pdf.

    https://www.tesla.com/sites/default/files/downloads/wall_connector_installation_manual_80A_en_US.pdf?201612081439

    found on this page Model S/X/3 Wall Connector
     
  3. ronm2948

    ronm2948 Member

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    Oregon
    Are you saying that you installed a Tesla Walll Connector? If that is what you are using, the problem is that the electrician did not set the amperage correctly in the Wall Connector (the same thing happened to me). Take a look at the manual for the wall connector. There is a little dial inside it that specifies what the amperage is of the circuit you are using. It defaults to “1” which is 15A (of which 80% is usable, hence the 12A). You need to set it to 30A which will give you 24A of charging, or double what you get now. You can do this yourself if you’d like (I did).

    If you want to do so, first of all make sure that you shut off the circuit breaker to the Wall Connector.

    Then, you need to remove the outer case of the Wall Connector. This requires a Torx security screwdriver (read the manual to see which size you need ... I think it was a “20”). Once inside, just use a small flat-head screwdriver to change the setting.

    Or you could just ask your electrician to come back and adjust it.
     
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  4. beedubyah

    beedubyah New Member

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    Fantastic, guys. I did install the Tesla Wall Connector (thanks for deducing that) and I believe that is the issue. Electrician said this might need configuration so this should be an easy fix. Thanks for the help. Pretty sure that solved my problem!
     
  5. TexasEV

    TexasEV Well-Known Member

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    The electrician needs to RTFM before installing the Wall Connector. Especially the part about setting the amperage.
     
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  6. beedubyah

    beedubyah New Member

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    • Like x 1
  7. eprosenx

    eprosenx Member

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    Just make sure that whatever you set it to that the backing wire and circuit breaker are of sufficient ampacity. (not to mention the load calculations for the feeder/service - presumably the electrician only wanted to do a 30a circuit since you otherwise have limitations to your electrical service that would keep you from doing more?)
     
  8. karpetkutter

    karpetkutter Member

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    Location:
    London, Ontario Canada
    dip switch adjustment in wall connector
     

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