TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC
Start a Discussionhttps://teslamotorsclub.com/tmc/tags/

How much current (kW) is your house using while charging?

Discussion in 'Australia & New Zealand' started by ElectricAutos, Oct 31, 2016.

  1. ElectricAutos

    ElectricAutos Member

    Joined:
    Oct 14, 2014
    Messages:
    25
    Location:
    Perth
    Has anyone measured how much current their house is pulling from the grid when the Model S is on charge?

    Would your local utility allow 22 kW+ assuming the house is on a three phase connection and the Model S is equipped with twin on-board AC chargers? The limits in WA are around 14 kW for a single phase connected house and around 21 kW for a three phase connected house.

    And what about households with two electric cars? Even two BMW i3s pulling 7 kW each would max out a single phase connected house.
     
  2. garyjac

    garyjac Member

    Joined:
    Jan 14, 2016
    Messages:
    422
    Location:
    Brisbane, Queensland
    As a general rule, I'm not sure the "problem" arises. A 32A single phase circuit (nominal 7.5 kw) can restore more than enough overnight for just about any daily driving scenario. I have 32A 1-ph on night rate for this. If I amin urgent need of a charge I have 3-ph 32A and that will top anything lacking up in less than two hours (my practice is not to be more than 200 km off a full battery. The house circuit does draw 22-24 kW on the 3-phase circuit. I would not use the large ducted air-conditioner while doing that though.
     
  3. Dborn

    Dborn Confirmed

    Joined:
    Aug 26, 2011
    Messages:
    2,393
    Location:
    Sydney, Australia
    My car is on 32 amp 3 phase. I have no issues. Just under 100km per hour while charging.
     
  4. meloccom

    meloccom Moderator Aus/NZ

    Joined:
    Feb 11, 2008
    Messages:
    1,488
    Location:
    Sydney Australia
    When the electrician installs your wall connector he/she should audit the capacity of your house connection and adjust the wall connector to suit.
    Even though I have 3 phase and 32 Amps at my holiday house I have never run it that hard out of respect of the local grid, currently I have adjusted the amps in the car to 20 which works out at about 14 KW.
    In the city I only have a single phase 32 Amp supply as I park my car in a shared garage of an apartment building which restricts me to 16 Amps or about 3.8Kw, but I can always go to the Pyrmont Supercharger to top up in an emergency.
    I understand that the latest Tesla wall connectors can be connected in series and the master will control the slaves to remain under the set capacity limit.
     
    • Informative x 1
  5. dogphlap

    dogphlap Member

    Joined:
    Jan 24, 2015
    Messages:
    97
    Location:
    Australia
    2015 single phase wall connector.
    The main circuit breaker is 63A so I'm limited to 15kW for everything but that is fine since water heating and cooking are gas. Charging at 2am uses 9.6kW if maxed out at 40A, boil a kettle at the same time would take that to 12kW so that is also fine. TV, computer and lighting (CFL and LED) take around 0.5kW total. If I wanted to turn on bedroom air-conditioning at night while charging I would need to turn down the charging current a bit to avoid the 63A switchboard CB limit. But my house runs cool with its white roof tiles and the shade from its PV panels so I hardly ever need the air conditioner day or night. It sounds a little close but the reality is no problems ever.
     
  6. Garlan Garner

    Garlan Garner Well-Known Member

    Joined:
    Mar 31, 2016
    Messages:
    5,973
    Location:
    Chicagoland
    My M3 is pulling 80 AMPs from my service panel. I only have a 200AMP service. That M3 is really hungry from all of the ludicrous 0-60 endeavors.


    hmmm...I can't wait to make that statement in about a year.
     
    • Like x 1
    • Funny x 1
  7. ShockOnT

    ShockOnT ⚡️⚡️⚡️⚡️⚡️

    Joined:
    Jun 26, 2016
    Messages:
    1,465
    Location:
    Sydney
    I will never stop envying dual chargers :)
     
    • Like x 1
  8. ShockOnT

    ShockOnT ⚡️⚡️⚡️⚡️⚡️

    Joined:
    Jun 26, 2016
    Messages:
    1,465
    Location:
    Sydney
    Just FYI, on my 32A 1-phase installation it works out to about 45km/hr charge.
    This is fast enough to take me (70D) from almost empty to full within the off-peak hours.
     
  9. Garlan Garner

    Garlan Garner Well-Known Member

    Joined:
    Mar 31, 2016
    Messages:
    5,973
    Location:
    Chicagoland
    Good point.

    Off peak charging. I'm going to have to put some kind of timer on my charger. OR it would be a great feature to put into the M3 - ONLY CHARGE BETWEEN THESE TIMES 00:00 and 05:00.....or something like that..
     
  10. Mark E

    Mark E Member

    Joined:
    Jun 27, 2012
    Messages:
    720
    Location:
    Sydney NSW
    I only have a single phase supply to my house - it
    I also have 32A single phase at home - although dual chargers in the car. In my case the charger is connected to controlled load off peak charging, but you can set the car to shedule timing for any time you like. It remembers this based on location.
     
    • Like x 1
  11. ShockOnT

    ShockOnT ⚡️⚡️⚡️⚡️⚡️

    Joined:
    Jun 26, 2016
    Messages:
    1,465
    Location:
    Sydney
    You can!
    The car can be programmed to start charging at a certain time. Mine starts at 10pm. Even if it's close to empty (rare) it's done before 6am.
    I'll add a screenshot from the Tesla app once I work out how to...
     
    • Informative x 1
    • Love x 1
  12. ShockOnT

    ShockOnT ⚡️⚡️⚡️⚡️⚡️

    Joined:
    Jun 26, 2016
    Messages:
    1,465
    Location:
    Sydney
    • Informative x 1
  13. ShockOnT

    ShockOnT ⚡️⚡️⚡️⚡️⚡️

    Joined:
    Jun 26, 2016
    Messages:
    1,465
    Location:
    Sydney
    Also note that for some reason Tesla doesn't give the option to schedule charge end time, only start time.
    This hasn't been a problem for me because charging is always complete before the off-peak period finishes.
     
  14. PatrickCH4313

    PatrickCH4313 Member

    Joined:
    Mar 6, 2016
    Messages:
    128
    Location:
    Switzerland
    Got a 16 A / 3-phases installation and it works out to about 66km/hr charge.
    Setting to 6 A ,I still get 30 km/hr when charging free during the day using my Solar installation between 10:00 AM and 15:00
     
  15. ShockOnT

    ShockOnT ⚡️⚡️⚡️⚡️⚡️

    Joined:
    Jun 26, 2016
    Messages:
    1,465
    Location:
    Sydney
    Charging on solar is "living the dream" :)
     
  16. garyjac

    garyjac Member

    Joined:
    Jan 14, 2016
    Messages:
    422
    Location:
    Brisbane, Queensland
    @ShockOnT: Just thought I'd torture you: 32A 3-phase, 105km/hr, all free on rooftop PV...:) Now, if you can just tell me what the strange thing in the froot is that my aunt gave me (and I don't know what it is)...?
     
    • Like x 2
  17. RC CAR

    RC CAR Member

    Joined:
    Oct 28, 2016
    Messages:
    6
    Location:
    Maylands
    I've got a question for you guys. I've recently installed a solar system that collects up to 5kw during peak sunshine.

    How would I know what Amp to set the car to, to make sure the car is getting charged by the solar array and not pulling from the grid?
     
  18. Garlan Garner

    Garlan Garner Well-Known Member

    Joined:
    Mar 31, 2016
    Messages:
    5,973
    Location:
    Chicagoland
    Fantastic Thanks.
     
  19. Garlan Garner

    Garlan Garner Well-Known Member

    Joined:
    Mar 31, 2016
    Messages:
    5,973
    Location:
    Chicagoland
    Thanks again for the info.
     
  20. Garlan Garner

    Garlan Garner Well-Known Member

    Joined:
    Mar 31, 2016
    Messages:
    5,973
    Location:
    Chicagoland

Share This Page