220V line install

Discussion in 'Prime Plug-in Charging' started by dpframing, Sep 12, 2022.

  1. dpframing

    dpframing "Nobody tells me what to do, not even me."

    Joined:
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    Location:
    Chester NY 10918
    Vehicle:
    2022 Prius Prime
    Model:
    LE
    Some quick reference guide tips on how to install a 220v line for the Prime would be greatly appreciated right now since my electrician is on his way over and I don't have time to search it or look it up in the manual. How many amps does the Prime use? Should I use a 20 amp breaker or higher? He has a Tesla but I know he's gonna ask me about the Prime requirements. Any facts would be a big help. Thanks.
     
  2. Isaac Zachary

    Isaac Zachary Active Member

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    It depends more on your EVSE (the charging cord) than the car. Normally the one that comes with the car is 120V 15A compatible, but apparently the Prime's EVSE can do 240V for a 15A or bigger circuit. So 15A circuit if you're using the Prime's EVSE with a 240V to NEMA 5-15 adapter.

    If you're getting a different EVSE, go with whatever amperage it's designed for.

    A little more info, the Prime will draw 12A on a 15A EVSE like it's own EVSE. That's because it's supposed to draw 80% of what the circuit is rated for (15A x 80% = 12A). If you get a dedicated EVSE you could go with a 240V 20A one, but again the Prime will charge at 80% of that, or 15A. (20A circuit x 80% = 15A draw). Apparently if you go with a bigger EVSE (40A, 70A, etc.) the Prime won't draw anymore than 15A. But if you installed one you still need to use the right cables for the EVSE, not the car, so that if someone ever hooks up their Tesla or Bolt they don't fry the wires.
     
    #2 Isaac Zachary, Sep 12, 2022
    Last edited: Sep 12, 2022
  3. pghyndman

    pghyndman Active Member

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    Location:
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    Vehicle:
    2021 Prius Prime
    Model:
    Limited
    Check for any rebates/tax credits available in your area to ameliorate installation costs. We decided to "future proof" to some degree by installing a ChargePoint Home Flex (NEMA 6-50 circuit) almost for free after all the credits. Our utility also allows up to $200 back per year if WiFi monitoring is allowed (they may reduce draw during peak season hours, but you can bypass when a faster charge is required).

    We don't require more oomph right now, but it is nice to be able to charge to Prime in far less time than with the stock charger (now takes about 1.5 hours to fully charge), and know we can handle higher capacities for future EVs.
     
  4. bisco

    bisco cookie crumbler

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    an electrician with a tesla? i'm envious :)
     
  5. dtsexpert

    dtsexpert Member

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    Location:
    San Francisco
    Vehicle:
    2021 Prius Prime
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    XLE
    max the Prime takes is 16amp so 20amp breaker is fine if you dont carr about future-proof.
    If your house is old with 100amp electrical panel, installing future proof line with 40-50 breaker will require to upgrade the panel as well.
    In short, sometime going for 40-50 amp breaker does not make sense.
     
    Isaac Zachary likes this.
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