how to 80% charge?

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billglas

New member
Joined
Jan 8, 2025
Messages
3
Location
Victor, NY 14564
I got a 2020 Leaf in May 2023. I have always charged it Level 2 to 100%. Under the best conditions, my range is at most 140 miles and I want to avoid range anxiety. How can I do the 80% charge thing? I don't believe that there is a charge limit setting built into the car so how do I set a limit? how necessary is it?
 
Necessary? No, but avoiding keeping the battery at high SoC for no reason helps reduce degradation.

See https://mynissanleaf.com/threads/th...ut-80-isnt-necessary.36542/page-2#post-651659 and docs at https://mynissanleaf.com/threads/th...ng-about-80-isnt-necessary.36542/#post-651529.

As for how, unfortunately, Nissan in their infinite wisdom removed the 80% limiter on US model year '14. See https://mynissanleaf.com/threads/th...ng-about-80-isnt-necessary.36542/#post-651405. You'll have to use the charging timers and make an estimate to get it to stop around 80%.

Charge to 100%, high SoC or whatever when you need it.
 
I got a 2020 Leaf in May 2023. I have always charged it Level 2 to 100%. Under the best conditions, my range is at most 140 miles and I want to avoid range anxiety. How can I do the 80% charge thing? I don't believe that there is a charge limit setting built into the car so how do I set a limit? how necessary is it?
My 40 kWh Leaf Level 2 charges at a rate of 18.5% / hour so it's easy to calculate how many hours are needed to charge to 80% or any other SOC and then put that interval into the Charge Timer. Alternatively, you can manually time the charge and stop at the desired SOC without the Charge Timer.
 
I got a 2020 Leaf in May 2023. I have always charged it Level 2 to 100%. Under the best conditions, my range is at most 140 miles and I want to avoid range anxiety. How can I do the 80% charge thing? I don't believe that there is a charge limit setting built into the car so how do I set a limit? how necessary is it?
After I had a L2 charger installed I frequently checked the Nissan “EV&Services” app during a charge. I found it charged at roughly 10%-11% every hour. So, since then, when I go to charge, I simply note the current percentage of juice and calculate in my head about when it should hit 80% if I plugged in then. Set a time on my iPhone for the number of hours it should take. When the timer goes off, check the app and either unplug or set a new timer if needed. Works for me. 😆
 
I got a 2020 Leaf in May 2023. I have always charged it Level 2 to 100%. Under the best conditions, my range is at most 140 miles and I want to avoid range anxiety. How can I do the 80% charge thing? I don't believe that there is a charge limit setting built into the car so how do I set a limit? how necessary is it?
The ONLY option you have is your charge timer. This also allows you the cheapest charge (if you are on TOU)

You will need to play with the timer but it won't take you more than a few days to figure out how much you need to charge to hit any SOC target. My guess is your weekly driving doesn't vary by much so don't worry too much about being exact. I aim for a "after charge" SOC between 50 and 65%; a pretty easy target to hit.

So look at your total range and how much you need (expected driving plus a buffer for those just in case things) and go from there.
 
I created a spreadsheet that helps me determine how long to charge. It is an approximation and bombs out if you want to go over 80%. You basically input the remaining charge, the rest of the values can be considered configuration. It will calculate the time and amount needed to charge.

AB
1Charge Remaining (%)32
2Desired SOC (%)80
3Charger Rate (A)27.5
4Charge Time (hrs)4.36
5Watt Hours to Charge (Wh)28,800
6Battery Size (Wh)60,000
7Voltage (V)240

B4=B5/B3/B7
B5=B6*(B2%-B1%)
 
I created a spreadsheet that helps me determine how long to charge. It is an approximation and bombs out if you want to go over 80%. You basically input the remaining charge, the rest of the values can be considered configuration. It will calculate the time and amount needed to charge.

AB
1Charge Remaining (%)32
2Desired SOC (%)80
3Charger Rate (A)27.5
4Charge Time (hrs)4.36
5Watt Hours to Charge (Wh)28,800
6Battery Size (Wh)60,000
7Voltage (V)240

B4=B5/B3/B7
B5=B6*(B2%-B1%) geometry dash
Yes, I determined it very easily the amount of power needed to charge. Thanks for providing this spreadsheet!
 
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