DaveinOlyWA
Posts: 13281
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Post Your Battery Degradation Results

Mon Mar 05, 2018 7:58 pm

On my 2018, I have gone from 115.13 ahr to 114.80 ahr in barely over 1400 miles.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 11,987 miles, 485 GIDs, 37.6 kwh 110.89 Ahr , SOH 96.00, Hx 115.22
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

WetEV
Posts: 2350
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: Post Your Battery Degradation Results

Mon Mar 05, 2018 8:00 pm

2104 SL 40,000 miles today, 60.57 Ahr HX 91.15
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

Beardedjeff
Posts: 20
Joined: Sat Nov 07, 2015 6:50 am
Delivery Date: 30 Oct 2015

Re: Post Your Battery Degradation Results

Tue Apr 10, 2018 8:15 am

2013 SV, kept in Wisconsin
42,143 mi, 15 QC's, 2139 L1/L2's
AHr = 58.60 SOH = 89.60% Hx = 86.88%

Going to try a few QC's over the next few weeks and see if it brings it up a bit. Overall i'm still really impressed at a 5 year old Leaf with 42k+ miles. I thought for sure I would have lost a few bars by now!

DaveinOlyWA
Posts: 13281
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Post Your Battery Degradation Results

Tue Apr 10, 2018 8:25 am

Beardedjeff wrote:2013 SV, kept in Wisconsin
42,143 mi, 15 QC's, 2139 L1/L2's
AHr = 58.60 SOH = 89.60% Hx = 86.88%

Going to try a few QC's over the next few weeks and see if it brings it up a bit. Overall i'm still really impressed at a 5 year old Leaf with 42k+ miles. I thought for sure I would have lost a few bars by now!


I had a 2013 with higher stats but add in the extra 1½ years of time and you are just about where I was. I bounced between 91-93% at 44,840 miles but switched to 30 kwh LEAF in Nov 2016
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 11,987 miles, 485 GIDs, 37.6 kwh 110.89 Ahr , SOH 96.00, Hx 115.22
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

User avatar
lpickup
Posts: 1142
Joined: Thu Nov 17, 2011 2:14 pm
Delivery Date: 09 Dec 2011
Leaf Number: 16138
Location: Raleigh, NC
Contact: Website

Re: Post Your Battery Degradation Results

Tue Apr 10, 2018 12:37 pm

Beardedjeff wrote:2013 SV, kept in Wisconsin
42,143 mi, 15 QC's, 2139 L1/L2's
AHr = 58.60 SOH = 89.60% Hx = 86.88%

Going to try a few QC's over the next few weeks and see if it brings it up a bit. Overall i'm still really impressed at a 5 year old Leaf with 42k+ miles. I thought for sure I would have lost a few bars by now!


Nice! My 2016 SV (30kWh battery), with 14,558 miles, only has 3.86 AHr more than yours (6.6% more, even though the battery is theoretically 25% bigger and I've only got about 1/4 the miles and time you have!
...Lance

Deep Blue Metallic 2018 Tesla Model 3 (31849) (delivered: 7/13/18)
Coulis Red 2016 SV (312310) (bought: 12/23/16 sold: 7/5/18)
Glacier Pearl 2012 SL (016138) (delivered: 12/9/11; traded in 12/23/16)
NOGA$4ME Blog

leafcaldonie
Posts: 1
Joined: Wed Apr 11, 2018 5:57 pm
Delivery Date: 12 Apr 2018

Re: Post Your Battery Degradation Results

Wed Apr 11, 2018 6:03 pm

Bonjour,

Je confirme cet article de https://insideevs.com/nissan-issues-sta ... gradation/
Nissan Issues Statement On LEAF 30-kWh Battery Degradation

1 D BY ERIC LOVEDAY 107
It’s not quite as detailed as we hoped for, but at least Nissan is fully aware of the concern and is investigating the potential issue.

Earlier this week, we presented the highly detailed findings of an in-depth Nissan LEAF battery degradation study.
Battery Issues – Nissan LEAF 30-kWh Battery Degrades More Rapidly Than 24-kWh Pack

The takeaway from the published results were:

“At two years of age, the mean rate of decline of SoH of 30 kWh Leafs was 9.9% per annum (95% uncertainty interval of 8.7% to 11.1%; n = 82). This was around three times the rate of decline of 24 kWh Leafs which at two years averaged 3.1% per annum (95% uncertainty interval of 2.9% to 3.3%; n = 201).”

Or, in very simplified terms, the 30-kWh LEAF seemed to have much higher battery degradation rates than the 24-kWh LEAFs.

The study concluded by suggesting that the rate of decline in the 24-kWh version of the LEAF is acceptable, but suggests that the 30-kWh pack declines too rapidly to be considered within normal parameters.
Replacement Batteries – Nissan Introduces $2,850 Refabricated Batteries For LEAF

Following the release of the results of this study and our coverage of the potential issue, Green Car Reports reached out to Nissan for comment. EV communication manager, Jeff Wandell, offered this response:

“Nissan is aware that a limited number of customers have expressed concerns with the previous generation of the Nissan LEAF 30-kWh battery.”

“LEAF owners are some of our most devoted customers.”

“We take their concerns seriously, and have technical experts currently investigating the issues raised.”

We’re glad to know that Nissan is looking into this potential issue. We’ll report back if Nissan presents any additional information.

The abstract from the work titled “Accelerated Reported Battery Capacity Loss in 30 kWh Variants of the Nissan Leaf” contains more details on the issue. It states:

Analysis of 1382 measures of battery State of Health (SoH) from 283 Nissan Leafs (“Leaf/s”), manufactured between 2011 and 2017, has detected a faster rate of decline in this measure of energy-holding capacity for 30 kWh variants.

At two years of age, the mean rate of decline of SoH of 30 kWh Leafs was 9.9% per annum (95% uncertainty interval of 8.7% to 11.1%; n = 82). This was around three times the rate of decline of 24 kWh Leafs which at two years averaged 3.1% per annum (95% uncertainty interval of 2.9% to 3.3%; n = 201).

For both variants there was evidence for an increasing rate of decline as they aged, although this was much more pronounced in the 30 kWh Leafs. Higher use of rapid DC charging was associated with a small decrease in SoH. Additionally, while 24 kWh cars with greater distances travelled showed a higher SoH, in 30 kWh cars there was a reduction in SoH observed in cars that had travelled further.

The 30 kWh Leafs sourced from United Kingdom showed slower initial decline than those from Japan, but the rate of decline was similar at two years of age.

Improvements in the battery health diagnostics, continuous monitoring of battery temperatures and state of charge, and verification of a fundamental model of battery health are needed before causes and remedies for the observed decline can be pinpointed.

If the high rate of decline in battery capacity that we observed in the first 2.3 years of a 30 kWh Leaf’s lifetime were to continue, the financial and environmental benefits of this model may be significantly eroded. Despite 30 kWh Leafs accounting for only 14% of all light battery electric vehicles registered for use on New Zealand roads at the end of February 2018, there is also the potential for the relatively poor performance of this specific model to undermine electric vehicle uptake more generally unless remedies can be found.

Myall, D.; Ivanov, D.; Larason, W.; Nixon, M.; Moller, H. Accelerated Reported Battery Capacity Loss in 30 kWh Variants of the Nissan Leaf. Preprints 2018, 2018030122 (doi: 10.20944/preprints201803.0122.v1)

Myall, D.; Ivanov, D.; Larason, W.; Nixon, M.; Moller, H. Accelerated Reported Battery Capacity Loss in 30 kWh Variants of the Nissan Leaf. Preprints 2018, 2018030122 (doi: 10.20944/preprints201803.0122.v1)

Source: Preprints

Nissan statement via Green Car Reports

Category: Nissan

Tags: featured, leaf battery, leaf battery degradation, Nissan LEAF, Nissan LEAF 30 kWh


Par mon expérience personnelle : je viens de perdre une barre d'autonomie sur ma Leaf 30Kwh a 18000Kms ; a 6000Kms j'avais encore 230 Kms d'autonomie alors que maintenant je n'ai plus que 170Kms.(documents joints basés sur Leaf Spy Pro).

Je tiens a votre disposition mes relevés Leaf Spy Pro.

Bien cordialement.

MEMO0002rd.jpg


P1160423rd.jpg


Durandal
Posts: 332
Joined: Wed Sep 21, 2016 8:55 am
Delivery Date: 22 Sep 2016
Leaf Number: 025018
Location: Central Arkansas

Lost 4th battery bar this morning

Mon Jun 04, 2018 5:50 am

I am now down to 8 battery bars as of this morning:
2012 SL
65.64% SOH
40.06 ah
43.49% HX
45,670 miles
2635 L1/L2
0 L3

I'm expecting to be told to pound sand, but I will call the Nissan Leaf customer line today to see if they will offer any 3/4 or 1/2 off replacement battery cost, as I am 6.5 months past battery warranty expiration.
Charging behavior: I have a charge timer set to charge to 100% and have it complete roughly 30 minutes before my morning commute.
Pulled the trigger on going EV on 10/2016 with a 2012 Leaf, and a Tesla Model 3 reservation expected to receive in June 2018.

nlagnew
Gold Member
Posts: 58
Joined: Mon Jul 25, 2011 9:03 am
Delivery Date: 08 Nov 2011
Leaf Number: 15120
Location: Chapel Hill, NC

Re: Post Your Battery Degradation Results

Tue Jun 05, 2018 8:35 am

Lost third battery bar 6/4/2018:
2012 SL, put into service 11/8/2011
61000 miles (hit that number exactly when I got home 6/3, bar was gone the next morning)
47.55 AH
70.48% SOH
50.66% HX
7 L3 charges
(didn't note the number of L2 charges)

a "full" charge seems to be about 14.6 kW at this time

located in central (RDU area) North Carolina - we do not have copious numbers of public EVSEs around, but fortunately my employer put in several around our campus.

I still enjoy my Leaf. I liked it a bit better when I had 12 bars, though!
Reserved 5/22/2010
Ordered:7/29/2011
Delivered: Nov 8, 2011
Lost first bar: 10/2/2014 at 28,410 miles
VIN: 15120

leaf2014EU
Posts: 3
Joined: Tue Jun 05, 2018 4:20 am
Delivery Date: 12 Dec 2013
Leaf Number: 000000
Location: Europe

Re: Post Your Battery Degradation Results

Tue Jun 05, 2018 10:21 pm

12/2013 Leaf 24kW (I think is left about 15kW usable)
321 500kms (199 770mi)
9 bars ( 2 weeks ago was 10 bars)
100% to 20% in town about 85kms
QC is limited (not temp related) after 50% and up, 5% to 50% is ok speed, after that is tooo slow, imo.
We have 85A/400V QC and 120A/400V in Estonia.

bought this leaf 3 weeks ago (cheap ex taxi, black), drives and looks normal-great.
not have yet leafspy

jasondNC
Posts: 1
Joined: Wed Jun 06, 2018 10:33 am
Delivery Date: 20 Jun 2013
Leaf Number: 406055

Re: Post Your Battery Degradation Results

Wed Jun 06, 2018 10:46 am

Lost 4th battery bar 16 days before the 5-year anniversary, and just confirmed at dealership that they will replace the battery under warranty. :D

2013 Leaf SL (first sold June 2013; we purchased used in August 2016)
33,289 miles
AHr = 43.06 [LeafSpy data after 4th bar loss]
SOH = 65.84%
Hx = 57.76%

1st bar was lost before we purchased in August 2016
2nd bar lost in early 2017
3rd bar lost in fall 2017
4th bar lost June 2018

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