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Roadster Charging

Discussion in 'Roadster' started by coolVariable, Jan 15, 2018.

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  1. coolVariable

    coolVariable Member

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    I am interested in potentially buying a Tesla Roadster but want to make sure that I understand the various charging options:

    Roadster to normal 120V outlet
    Roadster to NEMA 240V outlet
    Roadster to J1772 via CAN-JR
    Roadster to Tesla Desination Charger via CAN-SR
    Roadster w. JdeMo to Chademo (20% to 80% of battery usable capacity in ~45-55 minutes)

    Is that correct?
    How quickly do these various solutions charge the battery?
     
  2. miimura

    miimura Active Member

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    There was also a Roadster High Power Wall Connector, made by Clipper Creek that required a hard wired connection with a 90 amp breaker, delivering 70 amps to the car.

    A quick Google search turned up this archive image of Roadster accessories.
    [​IMG]
     
  3. ShawnA

    ShawnA Member

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    Hi CoolVariable,

    I found a sheet with approximate charging times put out by Tesla a long time ago...

    See the attached file.

    Shawn
     

    Attached Files:

  4. gregd

    gregd Active Member

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    Good list, but I would note that the "NEMA 240v" solution actually can cover just about any wall plug, via the adapters that are designed for the Universal Mobile Connector. The 240V 14-50 "RV" outlet is just one of the choices, though probably the most common. Also covered are the clothes dryer outlets (10-30 and 14-30), and some other less common ones.

    A full charge on a regular 120v outlet is something like 30 hours; not recommended unless your expected driving is very limited, or you have no other alternative. It's the least efficient of the set, besides the most time consuming. Most J1772 chargers that you find in the wild are 30 amps at either 208 or 240 volts, and will give you about 20 miles of range per hour of charge. The Tesla Destination chargers are often 40 amps, but can be up to the full 70 amps if you're lucky. 70 amps will give you a full charge in less than 4 hours, but in all of these, you will likely never need to go from empty to full, so scale things accordingly. An EV driver is most happy if its car is always plugged in whenever its not being used, unlike a gas car where you only fuel it when you have to.
     
    • Like x 1
  5. Msjulie

    Msjulie Member

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    Note sure if you're referring to this CHAdeMo charging for Tesla Roadster as the car didn't natively have fast charging...

    The Tesla HPC portable plus 2 'cans' seems has been the best all around for me, pretty much anywhere the car can be charged.
     
  6. coolVariable

    coolVariable Member

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    Updated:

    Roadster to normal 120V outlet (30 hours to charge fully)
    Roadster to 240V outlet (6-10 hours to fully charge)
    Roadster to J1772 via CAN-JR (10 hours to fully charge)
    Roadster to Tesla Desination Charger via CAN-SR (4-8 hours to charge fully)
    Roadster w. JdeMo to Chademo (20% to 80% of battery usable capacity in ~45-55 minutes)
     
  7. supersnoop

    supersnoop Tesla Roadster #334

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    I don’t think you should measure based on the device. What matters is voltage and amperage.

    There are two different “mobile chargers.” One tops out at 30 amps and the other goes to 40 amps. J1772 charges can range from 24 to 70 amps, with 30 being most common. Those J1772’s may be on a three-phase service, so 208 volts, or single phase service at 240 volts.

    At 240 volts and 70 amps, you’d go from empty to full in 2.5 hours. At 208 volts and 24 amps, it might take closer to 10 hours.
     
  8. coolVariable

    coolVariable Member

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    Thank you.
    Looking into buying a Roadster and am just trying to figure this all out.

    Also found this:
    https://teslamotorsclub.com/tmc/attachments/chrg_rate-png.233211/
     
  9. supersnoop

    supersnoop Tesla Roadster #334

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    Yes, use that chart. Know that charging at 208 volts will take about 15% longer than at 240 volts.

    Also, as noted, at the higher amperage, the charger will slow down when it gets close to finishing. See how 32 amps charges twice as fast as 16, but 64 amps take a little longer than half of 32.
     

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