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Wall Charger

Discussion in 'Model S' started by Bunnak, Jun 13, 2018.

  1. Bunnak

    Bunnak Member

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    Hi, I'm new to this forum. My lightly used 2016 Model S 75 is arriving any day now. I am a newbie when it comes to anything Tesla related. I ordered the Wall Connector so that I can charge at home and contacted one of Tesla preferred/recommended electricians. I asked how much charge I would be able to get for my Tesla. The electrician said that for my Tesla I could get about 30 miles per hour of charge. I told him that my neighbor has a Model X 75 and that he's getting about 50 miles per charge from his Wall Connector. The electrician said that that is impossible because the only Teslas that could get 50mi/hour are the 100s (Model S 100 or Model X 100). My hunch is that this Tesla preferred electrician doesn't know what he is taking about. Am I correct? Can my Wall Connector charge my Model S 75 at 50mi/hour? Thanks for your help and so sorry for the long initial message!
     
  2. BIG ACH

    BIG ACH Member

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    Your electrician is incorrect, it really depends on your electrical setup at home.

    I'm using a 240v 50A setup, and that charges at 30 miles per hour... but say you were able to setup 80A - that will get you to 50 miles per hour for sure!

    Also need to have dual chargers in your car.
     
  3. Bunnak

    Bunnak Member

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    Per Tesla's website on Wall Charger info, "For Model S or Model X equipped with the standard on-board charger (48A), install the Wall Connector with a 60 amp circuit breaker for optimal charging". My question then becomes is 60A enough to get 50mi/hour via the Wall Charger? Or do I need 80A or higher?
     
  4. Brettski

    Brettski Member

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    Here’s a chart that was in a document Tesla sent me shortly after I placed my order.

    30 miles/hr is reasonable for a Model S at 50A...... but according to this, it would require around 100A to charge a model X at 50 miles/hour. I’m sure people have such an installation, but I don’t believe it would be common.....

    Best of luck with delivery of your new Tesla!
     

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  5. gavine

    gavine Petrol Head turned EV Enthusiast

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    The 60A circuit with 48A output gets you about 33MPH on the Model X.
     
  6. BIG ACH

    BIG ACH Member

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    I don't think a 60A breaker will get you to 50 mi/hr.... because remember, the 60A will supply less to the vehicle (closer to 50A probably).

    My 50A breaker supplies 40A to the car. You will probably need 80A...

    There was a nice table that broke it down - hold on let me try to find it.

    EDIT: Looks like Brettski beat me to the punch with the table :)
     
  7. BIG ACH

    BIG ACH Member

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    Here are the charge rates per Amps
    [​IMG]
     
  8. P85_DA

    P85_DA Supporting Member

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    OP what matters is what charger you have in car .....do you have a print out of options ? It’s moot point to get higher amp circuit if u don’t have proper charger in car
     
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  9. ucmndd

    ucmndd Active Member

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    #9 ucmndd, Jun 13, 2018
    Last edited: Jun 13, 2018
    The key variable here is which charger is installed in the car you're buying. The default option for your vintage Model S 75 was a 48 amp charger. If you combine that with a Tesla High Power Wall Connector (HPWC) on a 60 amp circuit, you will get a max of about 34 miles per hour. Using the included mobile connector on a 50 amp NEMA 14-50 outlet will give you about 29 miles per hour.

    IF and only if your car includes the upgraded 72 amp charging option (which I believe was a $1500 option), then you can pair that with a High Power Wall Connector on a 90+ amp circuit and charge at ~52 miles per hour.

    Your electrician is correct with respect to cars currently being produced - the only way to get the 72 amp charger on a new vehicle is to select the 100 kwh battery.
     
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  10. Bunnak

    Bunnak Member

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    It's currently a MS60 delivered late 2016 (Sept/Oct). My plan is to upgrade to 75 when I get it later this week. Is this gonna be a problem for me then? I bought if from a dealer and it's getting shipped from out of state to my home in California.
     
  11. P85_DA

    P85_DA Supporting Member

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    No issues ...but what charger do you have in car ? Single charger ? Dual ? 48a 72a??
     
  12. ucmndd

    ucmndd Active Member

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    Define "problem". Do you need 50+ mile/hour home charging for your use case? (hint: most people don't)

    I would assume the car you bought has a 48 amp charger until proven otherwise. I don't think the take rate was particularly high on the $1500 charger upgrade.
     
  13. Bunnak

    Bunnak Member

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    I don't know what charger is in the car, or if it's 48a or 72a...sorry to ask a stupid question but when my car arrives where can I find this info? regarding the "problem" I'm referring to: I just want to make sure that I can get 50mi/hour charge with the Wall Charger. I can't rely on my wife to charge every night and we will be sharing the vehicle which is why I need something at home that charges quickly.
     
  14. Brettski

    Brettski Member

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    Did Tesla give you a spec sheet on the car? The type of charger on the car should be listed there with the other features.
     
  15. Bunnak

    Bunnak Member

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    I bought it from third party at a dealership--no spec sheets where given to me.
     
  16. Kuhz

    Kuhz Member

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    The only way to get 50+mph to charge your 75 is:
    1) have dual chargers
    2) Wall Charger needs to be on a 90 or 100amp breaker (more expensive)
     
  17. Bunnak

    Bunnak Member

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    So a Wall Charger with 100A breaker with 48A on MS75 won't get to about 50mi/hour? It has to have dual chargers? I read somewhere that they did away with option of having dual chargers. Or am I wrong? My Model S is was production 2016 (Sept/Oct).
     
  18. Kuhz

    Kuhz Member

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    Correct. The most you’ll get with a 48A single onboard charger is about 33mph. If your car only has one 48A charger it will only charge up to 48A no matter how high the Wall Charger is set and what breaker it’s on.

    For example my 75D has single 48amp charger and my HPWC is on a 60amp breaker which after line losses is about 48amps to the car.

    Yes the newer cars either have 48amp chargers or 72amp. Older ones (pre 2016 I believe) had either a single 48amp or two 48amp chargers.
     
  19. Bunnak

    Bunnak Member

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    so my Sept 2016 MS60 will either have 48amp or 72amp depending on what first owner bought, correct?
     
  20. boaterva

    boaterva Supporting Member

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    Note that the 48 amps you are getting isn’t ‘line losses’, it’s code maximum. You can only use 80% of the circuit for a charging circuit since it’s a ‘continuous’ load. See Flasher’s FAQ thread in my sig for much more.

    As said above the real question here is the hardware in the car. The HPWC is only a conduit for power from the house to the car, as the.car can’t charge more than the hardware in the car will allow. The electrician for once was correct. :D
     

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