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Real World HPWC Charging Curve

Discussion in 'Model S: Battery & Charging' started by Pmacafee, Feb 19, 2013.

  1. Pmacafee

    Pmacafee Member

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    San Francisco
    I have to install multiple HPWCs at a single location and not sure about the total load that will be created. Can someone tell me what their experience is with the charging curve on a HPWC? There are some very informative posts about what the the Model S draw down is on a Supercharger over an hour or so but can't find any postings about the HPWC, probably becuase they are just getting distributed.

    Philip Macafee
     
  2. bluetinc

    bluetinc Member

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    MD
    #2 bluetinc, Feb 19, 2013
    Last edited: Feb 28, 2013
    Hey Philip,

    I don't have an HPWC, but I have my own box that provides the same 80A to the S. During standard charging I see the car draw the full 80A after a ramp-up of 15 seconds or so. This then continues until the car finishes the standard charge (up to ~4 hours later), with a very quick ramp down. For a range charge you will see some ramp down over the last few miles you hear about on the superchargers but by this point you have had up to 5 hours at full load and the ramp down time is in the 10-20 min range. All in all, if you are planning multiple HPWCs, you need to be able to support the full load that they will draw.

    Peter

    Edit: Almost all my notes of this are when charging in the cold (Sub 32 degrees), and there isn't a clear way for me to tell which part of the charge is going to charging vs. heat.
     
  3. mitch672

    mitch672 Active Member

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    bluetinc, are you the person who made the RV camp setup that uses (2) 14-50s? If so, we are curious to see a schematic (possibly) of how you wired it up, including all of the contactors etc needed for phase matching etc.
     
  4. rolosrevenge

    rolosrevenge Dr. EVS

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    Yes, there is a decrease over time but it only begins after the battery is 70% full or more. You'll need to plan for the full load of all of them.
     
  5. AMPd

    AMPd Active Member

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    Is this at a business location?
    I was hoping PMACAFE was a cafe in San Francisco:)
     
  6. Pmacafee

    Pmacafee Member

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    Location:
    San Francisco
    No, I get my coffee at Peets, I have a corporate sedan service (business class limousine) and will get my first Model S next week and have 10 more reserved if that first one goes well.
     
  7. Bradleybang

    Bradleybang Member

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    Apr 14, 2008
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    Location:
    Oakland, CA
    Hey, I just recognized you are from "Quicksilver". I am a frequent customer. A big congrats on the Model S order. I would love to get my rides in an S!
     

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