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14-50 Winter Charging

Discussion in 'Model 3: Battery & Charging' started by BBBC, Dec 27, 2019.

  1. BBBC

    BBBC Member

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    Hi all,

    Got my 14-50 charging setup installed today, with a 40amp breaker (read this is OK since the draw is only 32 amps anyhow.

    I am getting only 15 mph of charge rate, which seems really low, any thoughts?

    It’s about 30F here today. Got plugged in and saw my charge rate was only a 15 mph. That was a cold car with 250 miles of range left. I ran around town with the heat on high, messing around draining the battery, got home and plugged in a warm car, theoretically warm battery, and 200 miles of range, plugged it in and still only 15 mph.

    I am worried that something is wrong with the parts, the install or the car.

    Thanks !
     
  2. jmaddr

    jmaddr Member

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    Is it saying 240v at 32a?
     
  3. BBBC

    BBBC Member

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    I just noticed on the charge screen on my phone, it says that i’m getting only 16/32 amps??? Any insight here would be great!
     
  4. BBBC

    BBBC Member

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    240 v, and 16/32 amps.
     
  5. eprosenx

    eprosenx Active Member

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    Is there a plus button you can turn up to the full 32 amps on that charging screen? Or is it limiting you to 16 amps?

    Did it display any errors when you connected it?

    Either it is manually turned down to 16 amps, OR something may be wrong with your onboard charger or latch mechanism of the charge port.

    What model of car do you have btw? (Need to know this to understand if you have two 16a charge modules or three 16a charge modules - if you only have two and one is broken that could explain it)

    If your charge port latch is broken it will also limit you to 16 amps charging rate.
     
  6. Matsayz

    Matsayz Active Member

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    #6 Matsayz, Dec 27, 2019
    Last edited: Dec 27, 2019
    Hit the charging/lightning bolt button on the screen while the car is plugged in. I bet you need to hit the + button where it currently says “16amps”. Tap that button until it maxes out, which should be 32 amps.

    Did you install this breaker and plug or was it an electrician?
     

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  7. BBBC

    BBBC Member

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    I will check this when I get back home shortly. Out for drinks right now with my father in law who did the install. He retired as a project super for Pepsi, building big production facilities, but started his career as an electrical engineer.
     
  8. Matsayz

    Matsayz Active Member

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    So as far as Father-in-laws go... trust but verify. Hopefully it’s just tapping up the amps and you’re good to go. Sometimes the software updates “reset” the amps to 16, not everyone has it happen but some do. Good luck!
     
  9. BBBC

    BBBC Member

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    Here are some pictures. Software setup doesn’t seem to be an issue?

    I will add that:

    1. this is a brand new car, less than 2 weeks old
    2. The charge port does feel “loose” and that there’s a lot of clicking when I plug in and it never quite seems secure when I let go of the cable and walk away
    3. I have had to supercharge a couple times, and that’s never been a problem charging at 200+ mph.

    many insights based on that?
     

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  10. Matsayz

    Matsayz Active Member

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    The cable should have some wiggle but not super loose. I don’t think the install was done properly but I’m not an electrician so I hired it out. Being a new car shouldn’t mean anything btw, it should pull a full load if you tell it to (32amps).

    You can try a full reboot, press both steering buttons and the brake until the screen turns off then it shows the Tesla “T”. See if that works.

    Are there any warnings or anything saying something is wrong with the car?
     
  11. mswlogo

    mswlogo Well-Known Member

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    It’s shows right on your screen shot what the problem is.

    Battery may still be to cold.

    It should ramp up.
     
  12. Matsayz

    Matsayz Active Member

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    I totally missed that you’re right. It might be pretty damn cold where he’s at then. Never see that.
     

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  13. BBBC

    BBBC Member

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    Yeah, but I really don’t think that’s it. When I plug in it starts drawing one amp, then 6 then 13. It ramps up to 16 within a minute or so and then it just stops, even after 2 hours it’s still at 16 amps.
     
  14. PACEMD

    PACEMD Active Member

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    Interesting, I've not seen that either. When I charge outside at work on a 120v 20 amp circuit it will often drop from 16 amp to 12 amp when the temperature is close to zero degrees f but I've never had the app mention temperature. And that's as of yesterday with the latest software.
     
  15. BBBC

    BBBC Member

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    No warnings. I will try this. I mention that it’s brand new only to point out the newest hardware and software configuration
     
  16. PACEMD

    PACEMD Active Member

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    Plug it in with a warm battery, after driving for a while. Oh, and test the amps at the receptacle, with a meter......
     
  17. Soey22

    Soey22 Member

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    Do you know any Tesla friends close by? Test your mobile charging with their Tesla to confirm....better yet, have them stop by and plug into your charger.

    I have the Tesla HPWC, but I’d start with troubleshooting and isolating the problem that way, since you just got the car.
     
    • Informative x 1
  18. BBBC

    BBBC Member

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    I did try that, no difference.
     
  19. Timbo2

    Timbo2 Member

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    My starting doing that this winter with any temperatures below 38F or so. I'm in an unheated garage so as soon as the battery pack cold soaks I'll get this message.

    If the pack is seriously cold soaked it can take 15 minutes to a half hour pulling 12 to 16 amps to warm the pack up enough to take any kind of charge.
     
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  20. PACEMD

    PACEMD Active Member

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    Does your father-in-law have a meter to check the amps on the circuit?
     

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