PLEASE HELP! Home Charging Options for Prius Prime

Discussion in 'Prime Plug-in Charging' started by Edward.Howard, Nov 18, 2016.

  1. Edward.Howard

    Edward.Howard Junior Member

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    Hello Everyone,
    I have ordered my 2017 Prius Prime Advanced and am trying to get my house ready for charging the car. I know the Prime operates on the industry standard J1772 (port). I have a designated 120V standard 15-amp GFCI outlet in the garage, but want to run a new 240V outlet for faster home charging. Does anyone know what the Amps need to be and what the outlet plug should look like? I am assuming something like a dryer plug. Also do I need to get an adapter for the included cable to be able to plug in. Any help would be greatly appreciated.
     
  2. DavidA

    DavidA Prius owner since July 2009

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    The 240v plug type will depend on the Level 2 charger you will be purchasing. There are at least 4 types of 240v socket types in the U.S. An option is to hard-wire the EVSE instead of plugging to a wall socket.

    The Prime has an internal 3.3kw charger (not to be confused with the EVSE you'll need). 3.3 is pretty tame as these go. Many other plug-in cars spec a 6.6 or 7.2kw charger, so at the 3.3kw, your Prime won't be drawing a big load while charging. A 30 amp breaker would probably be sufficient if it is only used for the Prime. Most EVSE mfgr's will suggest at least a 40 amp breaker and 8 gauge wiring, and 50 amp is not uncommon. Upgrading your service later to a higher amp breaker and beefier wiring is expensive, so you might consider just going 40 or 50 amp and 8g right from the get-go.

    Here's a pretty good article on chargers:
    How to buy an electric-car charging station: buyer's guide to EVSEs
     
  3. NR427

    NR427 Member

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    I would recommend having an electrician look at your situation if aren't familiar with the building codes in your area. You want to make sure your service can safely handle added load. It would probably be cheaper to install oversize lines and evse the first time if you ever plan on getting a bev in the future.
     
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  4. bisco

    bisco cookie crumbler

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    what kind of adapter for the included cable do you need? it should plug right in.

    plugincars.com has a nice article entitled 'buying your first home EV charger'.

    i think i have a nema 14-30. it depends on your L2 and desire for future planning/amperage.
     
    #4 bisco, Nov 18, 2016
    Last edited: Nov 18, 2016
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  5. DonDNH

    DonDNH Senior Member

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    I'm sure your Toyota dealer can help you get an electrician capable of helping you install the equipment need for charging at home.
     
  6. Trollbait

    Trollbait It's a D&D thing

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    It seems the Prime only needs 20A/240V for AC Level 2 charging, but even that requires a new EVSE. The cable that comes with the car is also an EVSE, but only good for AC Level 1 charging from a 15amp outlet.

    I'd install a 40 or 50 amp line and outlet. Not only does this give you something that can supply a BEV, but thicker gauge wire is a little more efficient at transferring the electricity. If you don't want to shell out the extra cash for the EVSE to match your new outlet amperage, get a 20amp one and adapter for the outlet.
     
  7. fotomoto

    fotomoto Senior Member

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    I have an Energi with a similar sized battery and charger specs. You only need the minimum size (16amp) 240v EVSE as the car's internal charger can't accept faster spec's; however, if you want to future proof the installation you might ponder going with a higher amperage, faster EVSE. You'll need to determine both the house panel's total amperage and how much is open and unused. Personally, I went with the cheapest 16amp EVSE and will wait for prices to fall as the market matures (both charge cables and EV's).

    I DIY my installation since it was fairly easy because there was a sub-panel in the garage exactly where I wanted to install the EVSE so I only need the barest minimum of parts. I installed a 20 amp 240v breaker at the bottom of the sub-panel and ran one foot of wire to the NEMA 6-20R wall receptacle. I bought a Clipper Creek "hard wire" EVSE which are slightly cheaper than wired units and attached the matching 6-20P plug to it. The NEMA 6-20 spec is what a lot of 240v A/C window units use.

    [​IMG]

    [​IMG]
     
    #7 fotomoto, Nov 18, 2016
    Last edited: Nov 18, 2016
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  8. giora

    giora Senior Member

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    As @Trollbait pointed out already, the portable EVSE (the "cable") that comes with the Prime is only good for 120V (L1). If you upgrade your outlet to 240V (L2) you need to purchase a new EVSE (or upgrade the stock one to L1/L2 which costs about $230).
     
  9. sboli

    sboli Junior Member

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    Where is your panel and are you installing the wiring and outlet yourself? at 3.3kwatts you will need a 20 amp circuit with a minimum of #12 awg. you may have to consider voltage drop if the distance is far.
     
  10. ttait

    ttait Active Member

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    Where do you get the upgrade? I was told Toyota doesn't make one yet.
     
  11. Lee Jay

    Lee Jay Senior Member

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  12. lroki

    lroki Member

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    I asked about 240V charging when I got my Prime. I was told that the Leviton units are the only ones "approved" by Toyota.
     
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  13. giora

    giora Senior Member

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    I wonder what kind of 'kick back' they are getting from Leviton for sending-in customers and whether Leviton is treating these customers as captive ones.:rolleyes:
     
  14. Trollbait

    Trollbait It's a D&D thing

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  15. DavidA

    DavidA Prius owner since July 2009

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  16. bisco

    bisco cookie crumbler

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    buy the cheapest one you can get, they're all the same unless you want wifi, and etc.
     
  17. DavidA

    DavidA Prius owner since July 2009

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    The eMotorWerks models are very small. I happen to think the WiFi options are almost useless. The data has to come off the company's server, which is a PITA. Just plug 'er in. It is merely an appliance.
     
  18. bisco

    bisco cookie crumbler

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    that's what i do. unless you're an info geek.
     
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  19. john1701a

    john1701a Prius Guru

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    Ever use ChargePoint for charging?

    The app & data is quite informative.
     
  20. DavidA

    DavidA Prius owner since July 2009

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    No I haven't. I don't have my car, yet, sadly.
     
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