Post Your Battery Degradation Results

[tkdbrusco]

Hi Everyone, is this normal after 6 months for 2015 S+QC? I could only charge up to 20.7 kw. When It was new it was 22.7 kw from Leaf Spy Pro. 260 GID at 100% charge. Lowest reading was 56.35 AHr SOH 91% Hx 86.95. I also notice using QC will increase AHr and Hx slightly.

Current Reading
57.63 AHr
SOH 92%
Hx 88.38%
7437 miles
62 QC
84 L1/L2

My 2015 S/QC has the following at 7,000mi.

280 GIDS at 100%
21.7 kwh
97.23 SOC
89.72 SOH
91.61 HX
59.44 Ahr

Not sure on L1/L2, but I know 0 QC

 

[jwalbaum]

Ahr - Hx - GIDs - Miles - Date
64.38 - 100.73 - 292 - 3287 - 11/7/2014
64.1 - 100.93 - 293 - 4034 - 11/20/2014
64.38 - 104.34 - 293 - 4661 - 12/5/2014
64.24 - 104.24 - 292 - 6039 - 1/15/2015
64.38 - 104.57 - 292 - 6694 - 1/31/2015
64.38 - 105.3 - 292 - 7863 - 3/1/2015
64.38 - 104.25 - 292 - 8968 - 3/18/2015



Manufacture date: 8/14 Lease date: 9/13/2014

 

[mwalsh]

Manufacture date: ? Lease date: 9/13/2014

Manufacture date should be on a label inside the driver's door jamb, towards the bottom of the "B" pillar.

 

[jwalbaum]

Manufacture date: ? Lease date: 9/13/2014

Manufacture date should be on a label inside the driver's door jamb, towards the bottom of the "B" pillar.

Thanks!

 

[jlv]

Manufacture date: 8/14 Lease date: 9/13/2014

If they were producing MY13 in Dec-13 and MY15 in Aug-14, then they didn't produce MY14 for very long.

 

[LeafSwe]

2014 Leaf

Manufacture date: 5/14 Lease date: 8/2014

550miles
AHr 67.36
284 GIDs @ 100%
SOH 100%
Hx 105,74%
11 QCs 221 L1/L2

 

[Deleted member 770]

Posting this just in case anyone wants to know...I keep my information in my signature, so this post will always be up-to-date. Hopefully I'll lose that 4th bar in the next couple of months and squeak in under the warranty period...

 

[DaveEV]

I wonder how close to the 4th bar I'll be by next June. Rate of loss so far:

12th bar lost: 27 months, 22k miles (0.56% / month, 0.67% / 1000 mi)
11th bar lost: 42 months, 33k miles (0.42% / month, 0.57% / 1000 mi)

It would be interesting to try to figure out how people's rate of capacity loss changes over time.

I do find that I need to charge to 100% a lot more frequently, now since trips that used to be possible on a 80% charge now require a 100% charge since I have 20%+ less capacity than I used to.

 

[lorenfb]

It would be interesting to try to figure out how people's rate of capacity loss changes over time.

Your data correlates (mileage) closely with many who have posted theirs, including mine:

2013 model, 18K miles, 56 Ahr @ 100%, 12th bar drops @ 52.5 Ahr, 11th bar drops @ 48 Ahr

The correlation obviously discounts the extreme temps conditions, e.g. temps >> 90 - 100 deg F.

 

[gbshaun]

I just lost my 10th bar.
I've been logging the capacity regularly since last June, and although it drops in jumps and suprts, overall it's been quite consistent. However it's also been clear that the local temperature is by far the dominant factor. Even one or two days of (v.warm) Santa Ana winds causes a distinctive drop.

I plotted the capacity

And also the projected date I'd lose the 10th bar, and will lose the 9th bar

As you see, quite steady and predictable. Slower decline in winter than summer.
Overall for 9 months: 0.015 Ah/day

6/14/2016 my car will be 5 years old.

Shaun

 

[lorenfb]

However it's also been clear that the local temperature is by far the dominant factor. Even one or two days of (v.warm) Santa Ana winds causes a distinctive drop.
6/14/2016 my car will be 5 years old.

Shaun

Yes, temp plays a factor in capacity loss, but you seem to discount mileage and age of the battery.
My Leaf has 18K miles and is 16 months old and is following your Ahr decline with my coastal temps
here probably on average 20-25 degrees less than yours. Most likely when my Leaf is 45 months old
and has 33K miles, its capacity will be very similar to yours even with the milder climate.

 

[opencar]

wow, our battery stats are almost identical. what was the Ahr reading upon drop of bar 10? i'm @ 47.70 now
thanks

I just lost my 10th bar.
I've been logging the capacity regularly since last June, and although it drops in jumps and suprts, overall it's been quite consistent. However it's also been clear that the local temperature is by far the dominant factor. Even one or two days of (v.warm) Santa Ana winds causes a distinctive drop.

I plotted the capacity

And also the projected date I'd lose the 10th bar, and will lose the 9th bar

As you see, quite steady and predictable. Slower decline in winter than summer.
Overall for 9 months: 0.015 Ah/day

6/14/2016 my car will be 5 years old.

Shaun

 

[gbshaun]

wow, our battery stats are almost identical. what was the Ahr reading upon drop of bar 10? i'm @ 47.70 now
thanks

It was 47.36.
During that last Santa Ana we had it dropped a lot, going from 47.63 to 47.36 in just 6 days and right past the 47.47 I had as my "10th bar target". But then it came back up a little (47.40) and held for a few days before dropping again and this time losing the bar on the day it again showed the 47.36Ahr

Do we have an expectation for when to lose the 9th bar?

Shaun

 

[ttweed]

Do we have an expectation for when to lose the 9th bar?

Low 43 AHr range is what I have seen reported for the 4th bar going away.

TT

 

[mwalsh]

Low 43 AHr range is what I have seen reported for the 4th bar going away.
TT

Although...I was quite shocked to hear that 91040 lost his at 41.6AHr. I hope to God mine doesn't hang on that long! :shock:

 

[kolmstead]

Yeah, 41.6 would suck. That's about 63%; a far cry from the 70% Nissan has been quoting as the warranty trigger (or the 66.25% they've actually been honoring). Mike's car and mine have been losing about 7% battery capacity per year. We are at 70% capacity, and we have nine months left to lose somewhere between 4% and 7%. 4% should be easy; 7% pretty tough. Still wondering if P3227 moved the limits for capacity bar loss a little lower. I lost the tenth bar when the battery's capacity was an Amp-hour lower than expected. I had P3227 done over a year ago.

-Karl

 

[mwalsh]

we have nine months left to lose somewhere between 4% and 7%. 4% should be easy; 7% pretty tough.

I know I shouldn't, what with the drought and all, and I really don't care for heat too much above 80 degrees, but I'm really hoping for a long, hot summer this year. The longer and the hotter the better!

 

[Deleted member 770]

Yeah, 41.6 would suck. That's about 63%; a far cry from the 70% Nissan has been quoting as the warranty trigger (or the 66.25% they've actually been honoring).
-Karl

Do you have any evidence that Nissan has been willing to replace a battery on a vehicle that hasn't yet lost the fourth capacity bar, but is at < 66.25%? And is that based on the LEAF Spy "SOH" parameter?

I haven't yet heard of anyone getting a replacement WITHOUT losing the 4th bar - if it's true, I'm curious as to what the process would be to get started.

 

[mwalsh]

Do you have any evidence that Nissan has been willing to replace a battery on a vehicle that hasn't yet lost the fourth capacity bar, but is at < 66.25%? And is that based on the LEAF Spy "SOH" parameter?

Nissan is not willing to accept any data from a third-party device as evidence of capacity loss. I went through this when I had my BCM replaced and felt that the new one had left me down on capacity by around 10%. When I called Nissan to open a ticket they flatly refused to acknowledge any data collected from my Gidometer.

 

[gbshaun]

Low 43 AHr range is what I have seen reported for the 4th bar going away.
TT

Although...I was quite shocked to hear that 91040 lost his at 41.6AHr. I hope to God mine doesn't hang on that long! :shock:

Looking at my graph that would put me exactly at my 5 year date. ha, maybe i'll have to take a couple of adventure weekend vacations to the desert !
The 9th-bar line right now on my graph is at 42.75Ahr. I should hit that next January-February at the current degradation rate (-0.015Ahr/day).
Maybe that loss rate will slow up a bit as now there is less capacity to lose? ie the steady thing that's lost per day/month/year is % of remaining capacity (eg 10%/year)

However the loss also means that the battery that remains is effectively working harder, no? I've had to swap from mostly 80% charges to 100% because of the reduced range.

Not complaining, love my LEAF, though I'd be disappointed to drop below 70% capacity (in May) and not get a warranty fix.