SageBrush
Posts: 5261
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

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

Sun Aug 23, 2020 7:33 am

eKrom wrote:
Sat Aug 22, 2020 5:26 pm
The best point is that it's a-OK to charge to 100% as long as the car is not sitting fully charged for long. Now how "long" is long?
I didn't say it is "A-OK" to charge to 100% SoC

I said sitting at 100% is bad, and the less time the battery sits at 100%, the less degradation from that cause.

I understand battery degradation as mostly due to battery temperature, SoC, and time at high SoC. These variables affect each other so the best approach is to do as best you can with each of them.
2013 LEAF 'S' Model with QC & rear-view camera
Bought Jan 2017 from N. California
Two years in Colorado, now in NM
03/18: 58 Ahr, 28k miles
11/18: 56.16 Ahr, 30k miles
09/20: 54.3 Ahr; 38k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

lorenfb
Posts: 2467
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

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

Sun Aug 23, 2020 7:54 am

cwerdna wrote:
Sun Aug 23, 2020 12:19 am
If charging on a 30+ amp L2 EVSE at 240 volts, figure about 6 kWh per hour is added to the battery during the full power phase, before ramp down and bounces. 6 kWh/h --> 6 kW, since h's cancel out. 6.0 kW is the official max OBC output while drawing 6.6 kW from the wall.

At my work, the supply voltage is ~208 volts, hence the typical max of 5.7 to ~6.1 kW or so (from the "wall") on our 30 amp L2 EVSEs.
It's that simple! The assumptions are that the battery isn't in the hot zone and charging hasn't tapered as it reaches full charge.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

WetEV
Posts: 3991
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?

Sun Aug 23, 2020 9:24 am

cwerdna wrote:
Sat Aug 22, 2020 6:50 pm
For some reason, Tesla's been able to get away with this for years w/UI that lets you charge to whatever % you want. 2017 and 2018 Bolt had a hilltop reserve toggle. Turning it on made it not charge as full. 2019+ Bolt have UI that lets you limit charge anywhere from 40 to 100% in 5% increments. Current HyunKia EVs also have some charge limiter UI, I believe in 10% increments and even separate settings for AC vs. DC charging.
Audi etron has 50% to 100% limit at 10% increments, can set up home as different than general locations, and can set up other locations as different as well. Not sure how many, more than two locations have have "advanced charging settings" for just that location. I think, but have yet to try, that applies to DC as well as AC charging. My general charging target is 100%.

So you could set 80% at home, 70% at work, 50% at some favorite vacation spot, and 100% generally. And maybe more locations, owner's manual does not give a limit and I've only tried two. This is a nice feature.

The charge timers, on the other hand, are a hot mess.
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

cwerdna
Posts: 11132
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

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

Sun Aug 23, 2020 11:04 am

Yeah, the other day I learned that my '19 Bolt also lets you specify different target charge levels for home vs. away. I've never played with that much as I almost never charge at home as it is so no need for that nor the very complicated timers on Bolt.

Maybe I should set home to 40% and away to 100? Currently, the main reason why I'd plug in my Bolt at all at home is for thermal management and I don't want it charging at home anyway at Pacific Gouge & Extort prices where my marginal cost to charge at home is about 31 cents/kWh (as opposed for free public L2 juice I can sometimes get or free DrivetheARC DC FC or 18 cents a minute EA or 25 cents/kWh DC FC at ChargePoint HQ (not near home though)),

'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.

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 4:31 pm

So it looks unclear why Nissan decided to remove 80% stop charge feature?

Probably a somewhat different question: how bad is frequent "up-charging" providing it does not reach 80%. Or is better to run as long as possible (well perhaps not below 20% SOC).
'17 Leaf S, 15k, SOH=88% Hx=70%

LeftieBiker
Moderator
Posts: 15473
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

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

Sun Aug 23, 2020 5:27 pm

Charging from just below (or at) 80% is ok if not done to a hot battery, and if not done very frequently. It's pretty clear that Nissan removed the 80% charge limiter because of the reduced EPA combined range rating. We just don't have anything from them in writing saying that. ;)
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

cwerdna
Posts: 11132
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

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

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

'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.

DougWantsALeaf
Posts: 2075
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

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

Sun Aug 23, 2020 6:36 pm

The S+ does a little better. A few of us in this board find the S+ does quite a bit better range/efficiency wise during temperate weather.
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

SageBrush
Posts: 5261
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

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

Sun Aug 23, 2020 8:03 pm

DougWantsALeaf wrote:
Sun Aug 23, 2020 6:36 pm
A few of us in this board find the S+ does quite a bit better range/efficiency wise during temperate weather.
And all it takes is driving below the speed limit.
2013 LEAF 'S' Model with QC & rear-view camera
Bought Jan 2017 from N. California
Two years in Colorado, now in NM
03/18: 58 Ahr, 28k miles
11/18: 56.16 Ahr, 30k miles
09/20: 54.3 Ahr; 38k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

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 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!
'17 Leaf S, 15k, SOH=88% Hx=70%

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