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Model S - HPWC (High Power Wall Connector)

Discussion in 'Model S: Battery & Charging' started by zax123, Nov 28, 2012.

  1. MorrisonHiker

    MorrisonHiker S 100D 2021.4.11

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    Just to confirm, are you setting the dip switches as shown below?
    upload_2021-1-4_14-2-17.png
     
  2. irish26

    irish26 Member

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    Yes sir. Top 2 switches to the right, bottom 2 switches to the left.

    For 50A the top 3 remain the same and the bottom switch moved back over to the right. I ran test mode before all this and it didn't give me any errors either.
     
  3. MorrisonHiker

    MorrisonHiker S 100D 2021.4.11

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    I don't have a gen 1 wall connector so I can't be of much help. I checked the manual and saw the dip switch settings. If they are correct, then I'm stumped. Maybe @Rocky_H would have some ideas?
     
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  4. scaesare

    scaesare Well-Known Member

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    Does the car indicate 12/60A or 12/12A?

    Also, not that I think it would explain this, but does your car have dual Gen1 chargers or the single later-gen 48A charger?
     
  5. MorrisonHiker

    MorrisonHiker S 100D 2021.4.11

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    Good question! 48A didn't come out for the S until 2016 so he'd either have 40A or 80A.
     
  6. irish26

    irish26 Member

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    it indicates 12/12A. I do not believe the car has dual chargers. It was not listed on the moroney paperwork.
     
  7. scaesare

    scaesare Well-Known Member

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    OK, then you won't get anything more than the 40A the car can use for a 50A circuit anyway.

    So you can either:

    1) Set the HPWC back to 50A, and forget about it while enjoying the maximum your single charger can give you

    or

    2) Try to figure out this odd behavior, as the car should use it's max rate (40A) even on an HPWC capable of delivering more.

    If you want to try the latter, maybe set the HPWC to test mode as on pg. 11 (dip switches all right) and see if ti passes?
     
    • Informative x 1
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  8. irish26

    irish26 Member

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    Ok. So maybe my max is 40A. I just assumed it was 48A

    If that is the case, should I switch out my breaker for a 50A breaker? Or is it OK to run the wall connector set to 50A when it’s really on a 60A?
     
  9. tga

    tga Supporting Member

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    As long as the wire is rated for 60A, a 60A breaker is fine (what wire - gauge/type - did you use?). The breaker is there to protect the wire, not the device at the other end of the wire.
     
    • Like x 1
  10. irish26

    irish26 Member

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    #1730 irish26, Jan 4, 2021
    Last edited: Jan 4, 2021
    #6 thhn wire for about a 25’ run. It was an electrician. I did not do the work myself.
     
  11. kash

    kash Member

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    Is it seated properly, or give it time to ramp up!
     
  12. Rocky_H

    Rocky_H Well-Known Member

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    This is funny. I got to this thread a few hours ago when this was the last message on here, and already had an idea of what was causing this but got called away to work stuff, so I just now got back to it and see there are more messages.
    And I saw someone used my Bat-signal.
    The thing is...there were two versions of the Gen 1 wall connectors, and they used different DIP switch settings, which do explain this behavior!

    Here is the link to the first version Gen 1 manual, with part numbers ending in A or B:
    https://www.tesla.com/sites/default/files/downloads/high-power-wall-connector-installation-installation-a-b.pdf
    And that's where you DIP switch setting comes from, with the top two right and bottom two left meaning 60A breaker.

    But here is the version for the later Gen 1, with part numbers ending in C or D, where they added some more breaker settings, including lower level circuits:
    https://www.tesla.com/sites/default/files/downloads/80a-single-phase-wall-connector-installation-manual-c-d.pdf

    And in that version of the wall connector, if you have the DIP switches set that way, it's for a 15A circuit, supplying 12A to the car! So @irish26 that seems to be your issue. If you look at the part number, I'll bet you have this type ending in C or D. Now unfortunately, they didn't have a setting for 60A breakers. They had 50 or 80. So with your setup, the 50 is about the best you can do, supplying 40A to the car. It just happens to be a coincidence that the DIP switches for 50A are the same between both versions of the wall connector. They repurposed some of the less common breaker size settings of 60, 70, and 90 to make the settings for lower level circuits.

    Dang, this was a fun mystery!
     
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  13. JPoldo

    JPoldo Member

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    Has there been any news on the gen3 WC capable of direct billing to users? Clearly, it requires new software to achieve this functionality, but heard from reliable sources it was coming. This feature would greatly help people who live in apartments & condominiums charge at home. I think many of these prospective EV buyers are sitting on the sideline waiting for home charging.
     
  14. irish26

    irish26 Member

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    Boom that was it! My part number ends with D. Bummer that they don’t have a 60A setting but oh well. 40A will be just fine for me. Thanks for taking the time to solve this one!
     
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  15. tga

    tga Supporting Member

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    You're good - don't worry about replacing the breaker (not worth the $) - 6ga THHN is good for 60A, since you can use the 75degC column. NM-B (romex) is only good for 50A (since you must use the 60degC column for NM-B). But @Rocky_H solved the mystery (I had completely forgotten about the A/B vs C/D version of the Gen 1)
     
    • Helpful x 2
  16. morrisdl

    morrisdl Member

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    Does you S have a 2nd onboard charger? If not 40A is the max.
    Have you had and eMMC MCU1 problems? Mine would sometimes default down to 12A before it was replaced with the new 64G version
    Lastly, maybe it is just a bug in the current S/W that MCU1 Tesla dont negotiate with 60A HWPC.
     
    • Informative x 1
  17. David29

    David29 Supporting Member

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    Do you know if you have dual chargers installed? If not, the car will only charge at a maximum of 40 Amps anyway. The 48 amp chargers came later in Model S production. That may (or may not) be an explanation.
     
  18. Rocky_H

    Rocky_H Well-Known Member

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    Guys, this was already solved--nothing to do with single or dual chargers in the car. He has a version of the Gen 1 wall connector that can't be set for a 60A circuit. The DIP switches were forcing it to indicate a 15A circuit.
     
    • Like x 3
  19. irish26

    irish26 Member

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    Me again. I’m looking at upgrading to MCU2 thanks to the lowered price.

    I stumbled across the the threads about Gen 1 Wall Chargers not working with MCU2 cars. Has that been resolved? I also saw some folks able to charge at 40A? That would be fine for me if feasible.
     
  20. Hayseed_MS

    Hayseed_MS Member

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    Do these wall chargers have a way of keeping track of the usage? I will be installing and my company will pay for the charging. Without adding anything else to the system, does the charger keep a tab of the kwh used?
     

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