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eMotorwerks JuiceBox Smart Charging and Model 3 Incompatibility Update

Discussion in 'Model 3: Battery & Charging' started by Charlie_T, Aug 24, 2018.

  1. Charlie_T

    Charlie_T Member

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    Aug 4, 2018
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    Foster City
    For Model 3 owners having trouble using the eMotorwerks JuiceBox Smart Charging feature, I received this email from eMotorWerks today:

    “Thank you for your participation in eMotorWerks Rewards program.

    We appreciate you identifying your Tesla Model 3 in your JuiceNet mobile app. As a result, as of Tuesday August 21st, we have implemented special handling of your smart charging events to accommodate Model 3s. You will notice that your car may reduce its charging rate during the night, but not shut off entirely, before returning to a higher charging rate.

    This is due to Model 3s not currently following the J1772 charging port standard. Similarly, we strongly recommend use of your Tesla's time-of-use settings, rather than your JuiceNet settings, if applicable. In both cases - smart charging events and time-of-use settings - the Model 3 will not "wake-up" due to instruction from an EV charging station.”


    The Smart Charging program website is https://emotorwerks.com/rewards .
     
  2. bahree

    bahree Member

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    Seattle
    This is interesting and thank you for sharing. I also have a JuiceBox Pro 40 and never had this issue. But that might also be because we don't have ToU here and I never noticed or tracked it as a result.

    Do you have any more details on what spec the car isn't implementing?
     
  3. Charlie_T

    Charlie_T Member

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    The Smart Charging feature of the JuiceBox is supposed to turn on or off charging when the car is plugged in in order to charge when the cheapest and greenest electricity is on the grid. eMotorWerks then provides you with cash rewards, provided to them from the power company for saving the power company money. With the Model 3, however, if the JuiceBox temporarily turns off charging when power is expensive and then later turns it back on, the Model 3 will not wake up to charge. That is why eMotorWerks provided the workaround mentioned in their email. A related issue is that if you set the JuiceBox to charge at a specific time - say at night - it will not be able to wake up the car when charging is supposed to start. That is why they suggest setting the charging time in the Model 3 and not in JuiceBox.

    The email says that the car is not following the "J1772 charging port standard", which is how it communicates with most public charging stations. eMotorwerks has said that Tesla will be fixing this problem by the end of the year.
     
    • Like x 1
  4. vashwood

    vashwood Member

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    Oct 21, 2018
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    Location:
    San Jose
    I just noticed this as well. At first when I used my older car in my Juicebox profile, my Model 3 would not finish charging since it would have to be woken up first. And when I added the Model 3 to my Juicebox profile, it would not seem to follow my Juicbox TOU settings.

    Are you just using both the Juicebox TOU and the Model 3 TOU?
     
  5. Msjulie

    Msjulie Active Member

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    San Fran Bay Area
    I have an old-school juicebox (no wifi or timer) - the car has charging scheduled itself, must be the magic. No trouble with the charger otherwise - charges the Audi A3 e-tron and previously the leased Fiat 500e w/o issues
     
  6. tommolog

    tommolog Member

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    Northern NJ
    Looks like Tesla and eMotorWerks are working on a resolution. In the meantime, you can still use a JuiceBox without issues, because they have implemented a temporary workaround until Tesla updates their software: I got this from eMotorWerks.


    Attention: Tesla Model 3 Drivers

    Unfortunately, the Model 3 does not currently comply with the J1772 charging port standard right now. However, Tesla has been aware of this issue, but we do not yet have an estimated time frame from Tesla when it will be resolved by a future firmware update.

    Meanwhile, instead of your JuiceNet-enabled charging station disallowing charging, such as outside of your desired time-of-use (TOU) period or for smart charging events, your charger associated with a Tesla Model 3 will operate at approximately 2kW for these periods to avoid a failure to charge your vehicle.

    In the interim, we ask that you use the Tesla app timer to enable your charging session to begin at your desired times and deactivate your JuiceNet Timer for now.


    Additional context:

    When you are using your JuiceNet Time-of-Use (TOU) settings or participating in a Smart Charging Event, the Model 3 may not commence charging when expected. This means that it may not “wake up,” despite your JuiceBox permitting power to flow to your EV. In the event you use the JuiceNet TOU timer, your EV will charge at 2kW before your TOU period and at your full charging rate during your TOU period. For smart charging events, we handle this issue by not pausing your charging entirely, but rather by reducing the charging rate by approximately 2 kW until the smart charging event is completed.
     
    • Like x 2
  7. compu85

    compu85 Supporting Member

    Joined:
    Jun 7, 2016
    Messages:
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    Location:
    Springfield, VA, USA
    We noticed that too - an acceptable work around. It's too bad they could only go down to 9 amps, the J1772 minimum of 6 would be even better for our time of use plan.

    -J
     

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