Limit charge to 80%

Discussion in 'LEAF' started by David Douglas, Jun 28, 2019.

  1. David Douglas

    David Douglas New Member

    Hi, I just got a new 2019 leaf a few days ago, I haven't had time to dive into the manuals. I leave for a 12 day camping trip in two days. I don't see any menu items that will allow me to limit the charging to some set percent, like 80%

    I bought a juice box and believe this can limit the charge. But at work they will have some charging available in the future and I don't want to be charging up to 100% every day while at work

    Thanks
    Dave
     
  2. Kenneth Bokor

    Kenneth Bokor Active Member

    Hi David, the Gen 2 Leafs don't offer the programmable charging thresholds anymore with the vehicle. They just offer charging start/stop time intervals and climate pre-con scheduling.

    I've talked to Nissan engineers about this and they tell me it's fine to charge up to 100% on these Gen 2 Leafs. This includes both the 40kWh and 62kWh models.

    I know many will argue and not agree with this approach, but Nissan states they have no issues with Level 1/2 regular charging to 100%. So I can only tell you what they told me. I for one charge my 40kWh Leaf up to 100% when I need to. I use it daily and as needed, when the battery SoC gets low enough and I know the next day I will need more range, I plug it in for an overnight charge to 100% at off-peak electricity rates.

    If you have a wall Charger for home that is programmable with percent threshold limits, then you certainly and use that. It's up to you.
     
  3. David Douglas

    David Douglas New Member

    I have the plus model. I ask because my work might be adding some charging stations (I don't know if L1 or L2 yet). If level 1 that won't be an issue as I won't reach 100% if I arrive say at 60%. If they install level 2, it will be charged up to 100% every day. I want to get the longest life out of my batteries as we all do :)
    I live north of Barrie, your Leaf gathering sounds interesting
     
  4. Kenneth Bokor

    Kenneth Bokor Active Member

    You will be fine David. It's really many many DC Fast Charges that can take a toll on a pack. L1/L2 are fine.

    Yes, I'm hoping to organize a cruise day this fall, so follow me on Twitter to stay informed @EVRevShow
     
  5. Electra

    Electra Active Member

    Right after you turn the car off, you can set the timer by using the left controls on the steering wheel. There are two timers so set one for work and one for home. If you're using a Level 2 EVSE at work, it should charge at around 10% per hour since you have a Plus (16%/hr for non-Plus) . Let's say you arrive at work with 50% at 8:00 and you want to charge to 80%. Set timer 1 to start at 8:00 and end at 11:00. I would recommend you to do it this way in case someone else at work needs to charge, they can unplug you when your car stops charging at 11:00. Set your timer 2 to when you'll be at home, like 4:00PM to 6:00AM and use your JuiceBox to limit the charge (if it can do that, if not, set the timer in hours to get to 80% like above)
     
    Joe McLain likes this.
  6. Kenneth Bokor

    Kenneth Bokor Active Member

    Only thing about using the timer is that if you park the car in the evening at different times, it will be hard to program it to go to 80% based on time consistently.
     
  7. Electra

    Electra Active Member

    Yes, I have to do it manually every time. Takes less than 30 secs. It would be easier with a Leaf Plus since it's about 10% per hour. On the 40 kWh, it's about 17% per hour for me so I have to open my calculator app. :)
     
  8. Kenneth Bokor

    Kenneth Bokor Active Member

    That's too much math for me, but great you have it figured out! :)
     
  9. Electra

    Electra Active Member

    Not really since I use my calculator app. Let's say you arrive at home with a 30% charge and you want to charge it up to 80%. Open your calculator app and put in 80 - 30 = 50 / 17 = 2.94 hours. I use 17 here because that's about how many % my Level 2 EVSE charges at, yours may be a little bit lower. If you want to start charging right away, set the start time to < the current time and stop time 3 hours from now. If you want to start charging later, set the start time to the later time and stop to 3 hours after the start time. You should get to around 80% when you use this method. It sounds complicated, but it's really easy after you do it a couple of times.
    My charging time estimate by the increased in battery %, yours may vary:
    70% - 4:10
    60% - 3:30
    50% - 3:00
    40% - 2:20
    30% - 1:50
    20% - 1:10
     
  10. Kenneth Bokor

    Kenneth Bokor Active Member

    Thanks, I will look at this too.
     

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