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HPWC Charging Rate Slower

Discussion in 'Model S: Battery & Charging' started by Mrwatchdawg, Jun 24, 2017.

  1. Mrwatchdawg

    Mrwatchdawg Member

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    Jun 2, 2017
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    Location:
    Dallas
    Quick question, on. HPWC what is the charge rate per hour?

    Just installed mine today (sadly don't have the high amperage charger since I have 75D and not worth paying to upgrade) and love the convenence of not having to pull the cable outta the car.
     

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  2. Lloyd

    Lloyd Well-Known Member

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    San Luis Obispo, CA
    What you show is correct
     
  3. Silverstreak

    Silverstreak Member

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    Indiana
    That is all you will ever get
     
  4. Mrwatchdawg

    Mrwatchdawg Member

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    Ok awesome. Which honestly is more than enough to charger overnight anyway.
     
  5. CLLACAB

    CLLACAB Member

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    Dec 11, 2014
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    Location:
    Simi Valley, CA
    Is that with the single onboard charger. If it has the dual chargers, it should get 59 mph.
     
  6. Rocky_H

    Rocky_H Active Member

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    Boise, ID
    Just to clarify how to ask the question a little better in the future:
    This is a little like asking how much a bucket holds. "a bucket", as the name of an object doesn't really tell you how big it is.
    A HPWC can be installed on a 20A circuit, or a 100A circuit, and they will have vastly different charge rates per hour. So you might ask this type of thing with some numbers of volts and amps, so it's easier to answer the question. I usually run a ratio, using a given data point that I know and scale it to other levels. At 240V and 40A, it's about 29 mph for a Model S. So 40 / 29 = 48 / X. Solving for X is about 34.8, so yep, your charging rate looks like I would expect.
     
  7. Galve2000

    Galve2000 Member

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    May 20, 2013
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    602
    Location:
    NYC
    I would be thrilled to get 48 Amps instead of 40. particularly since most of NYC is commercial power limited to 208 V instead of 237 V that u are getting.
     

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