eKrom
Posts: 12
Joined: Thu Jul 30, 2020 1:08 pm
Delivery Date: 29 Jul 2020
Leaf Number: 307821
Location: Bay Area, CA
Contact: Website

Re: how to charge to 80% on model SL?

Sun Aug 23, 2020 10:04 pm

cwerdna wrote:
Sun Aug 23, 2020 5:31 pm
eKrom wrote:
Sun Aug 23, 2020 4:31 pm
So it looks unclear why Nissan decided to remove 80% stop charge feature?
Seems likely due to https://www.mynissanleaf.com/viewtopic. ... 04#p589104.

Even now, Leaf Plus without the limiter is at an EPA mileage disadvantage vs. competitors in its price range:
https://www.fueleconomy.gov/feg/Find.do ... 1&id=42089
https://www.fueleconomy.gov/feg/Find.do ... 4&id=40520
Wow, that's interesting - so Leafs have (somewhat) worse efficiency.

I can see how eliminating 80% would make the EPA range a bit better (against 80/100 average) so that is still a side-effect of EPA's silly standard. They can't prevent me from unplugging the car before it's fully charged or misuse the end timer...eh?
'17 Leaf S, 15k, SOH=88% Hx=70%

cwerdna
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Location: SF Bay Area, CA

Re: how to charge to 80% on model SL?

Mon Aug 24, 2020 12:17 am

Yeah, I don't think anyone here is clear why Tesla can get away with UI to let you control charge end SoC along w/GM and now HyunKia.

Maybe Nissan got bit because they called 80% "long life mode" and had references in '11 to '13 manuals with stuff like this?
• Avoid sustained high battery state of charge (caused, for example, by frequently charging to 100% state of charge and/or leaving the battery
above 80% state of charge for long periods of time).
• Allow the battery charge to be below at least 80% before charging.
Above is from page EV-24 of the '13 Leaf manual.

And, maybe it's related to this that was written before Leaf shipped?
https://web.archive.org/web/20100112044 ... tes_page_3
that vehicle is tested in any driver-selectable mode, such as a transmission sport mode, that would worsen emissions. But for fuel-economy purposes, many things are up for discussion; it’s the automaker’s task to convince the EPA how the cars are likely to be driven in consumers’ hands.

The EPA’s Wehrly describes a hypothetical, but typical, discussion where an automaker wants to get around activating a particular feature that degrades fuel economy during the testing. Luxury automaker: “We have this feature, but no one uses it.” EPA: “Then why do you have it?” Automaker: “Because Mercedes has it. If we don’t have it, it looks bad.”

'19 Bolt Premier
'13 Leaf SV w/premium (owned)
'13 Leaf SV w/QC + LED & premium (lease over)

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

WetEV
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Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: how to charge to 80% on model SL?

Mon Aug 24, 2020 7:05 am

Audi manual says
You can set the charging target, meaning you can set the maximum charge level to which the high-voltage battery should be charged. The charging target can be set between 50% and 100%. For daily usage, Audi recommends setting the charging target at 80%. This can extend the service life of the high-voltage battery. Before long trips, Audi recommends setting the charging target at 100% for the highest possible range.
Nissan needs to change the manual to something similar, or use the GM "hilltop mode" or something.
WetEV
#49
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red (Totaled)
2014 Leaf SL Red
2019 eTron Blue

DougWantsALeaf
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Leaf Number: 407811
Location: Chicago North Side

Re: how to charge to 80% on model SL?

Mon Aug 24, 2020 7:13 am

I wonder if Nissan introduced the quarterly buffering as a way to mitigate not having a hilltop mode.
2019 S Plus (98.06% SOH) & 2019 SV Plus (94.77% SOH) Both Silver
2013 Leaf SV sold 2019 with 11 bars
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV+: 242 Highway miles @ 4.5 miles/kWh

alozzy
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Location: Vancouver, BC
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Re: how to charge to 80% on model SL?

Mon Aug 24, 2020 9:34 am

eKrom wrote:
Sun Aug 23, 2020 9:50 pm
alozzy wrote:
Sat Aug 22, 2020 11:26 pm
Dala's solution is both simple and inexpensive. Why not explore that option?

If he won't sell you a modded version, the muxsan can bus bridge can be purchased here:

https://www.tindie.com/products/muxsan/ ... rt-rev-25/

And the source code for Dala's BatterySaver is here:

https://github.com/dalathegreat/Nissan- ... tterySaver
That is way cool, thanks!
If you decide to give that BatterySaver solution a try, please post back your experiences and the steps you took as that content would be valuable to the LEAF community. So many people have requested 80% charging and the go to answer is always to use some sort of timer. This solution seems a lot more elegant and even improves on the stock 80% option of the 2013 MY.

I'm fortunate to have the 80% charging option, as I own a 2013 LEAF, or I would have given this a shot by now. Good luck!
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

GerryAZ
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Re: how to charge to 80% on model SL?

Mon Aug 24, 2020 7:19 pm

eKrom,

If you want the charge timer to stop at the programmed time, you need to program both start and end times. The car calculates when to start charging to reach full charge a little before the end time if you only program an end time. I have start and end times programmed to match my off-peak power times (2011, 2015, and 2019 all stop or stopped charging at the programmed end time). The 2019 has a setting for "full charge priority" that will override the end time if active, but the 2011 and 2015 did not have that setting so I don't know when it first appeared. It took a little time reading the owner manual of the 2019 to find out what the "full charge priority" setting would do. Obviously, I keep it turned off to make my timers work correctly.

If your daily use pattern is consistent, you should be able to program charge start and end times to get close to 80%. Personally, I almost always charge to 100% unless the car will not be driven soon after charging. I don't worry about the car sitting for a few hours after charging to 100%, but would not let it sit that way for more than a day or two. I make sure the SOC is less than 70% when the car is parked for extended time at the airport or my office.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

User avatar
Dala
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Re: how to charge to 80% on model SL?

Tue Aug 25, 2020 4:47 am

It is also possible to get a CAN-bridge and load BatterySaver onto it :)

https://www.youtube.com/watch?v=yJvrB6aw5Ys

alozzy
Posts: 1605
Joined: Fri Jan 20, 2017 4:25 pm
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Location: Vancouver, BC
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Re: how to charge to 80% on model SL?

Tue Aug 25, 2020 9:06 am

Dala wrote:
Tue Aug 25, 2020 4:47 am
It is also possible to get a CAN-bridge and load BatterySaver onto it :)
Indeed!

https://www.mynissanleaf.com/viewtopic. ... 10#p589119
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

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