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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

    Joined:
    Aug 4, 2018
    Messages:
    20
    Location:
    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

    Joined:
    Jul 9, 2018
    Messages:
    73
    Location:
    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

    Joined:
    Aug 4, 2018
    Messages:
    20
    Location:
    Foster City
    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.
     
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