2015: Battery Data Report @ 100% Charge

And all the stats shot up out of the blue, been a little warmer this week, but still

2015 S - About 27K miles - MFG 4/14

277 GIDS
21.47 kwh
97.25% SOC
88.78% SOH
90.59 HX
58.82 Ahr
72.1 degrees

tkdbrusco - Have you driven more than usual lately? That is the main thing I've seen when stats increase.

LeafMuranoDriver said:

tkdbrusco - Have you driven more than usual lately? That is the main thing I've seen when stats increase.

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No, its just been the normal commute. My wife says that she's been more diligent about charging after lunch the past few weeks since it has warmed a bit and we don't want it sitting longer than necessary at 100%, not sure if that had anything to do with it. Even if you charges in the AM we are only talking about it sitting there for 4 hours or so at 100%.

Happened to check LeafSpy last week and saw 284 Gids. Car purchased in Oct 2014 and has about 11,000 miles.

Nov 3 '14: KM - 11 962, Soh - 100%, Charges - 11 QC 256 L1/L2, Gidds - 289, kWh - 22.4, Soc - 96.4%, Hx - 101.94%, Ahr - 64.38
Jan 17 '15: KM - 19 338, Soh - 100%, Charges - 38 QC 453 L1/L2, Gidds - 292, kWh - 22.6, Soc - 97.2%, Hx - 108.32%, Ahr - 64.38
Mar 31 '15: KM - 26 786, Soh - 100%, Charges - 65 QC 647 L1/L2, Gidds - 292, kWh - 22.6, Soc - 97.1%, Hx - 111.18%, Ahr - 64.38
June 25 '15: KM - 36 038, Soh - 100%, Charges - 67 QC 814 L1/L2, Gidds - 292, kWh - 22.6, Soc - 97.4, Hx - 99.62, Ahr - 64.38 / 62.68
Aug 31 '15: KM - 43441, Soh - 99%, Charges - 90 QC 939 L1/L2, Gidds - 291, kWh - 22.6, Soc - 97.5, Hx - 95.40%, Ahr - 61.73 / 60.19
Sep 7 '15: KM - 44171, Soh - 100%, Charges - 91 QC 948 L1/L2, Gidds - 292, kWh - 22.6, Soc - 97.2, Hx - 98.21%, Ahr - 63.90 / 62.14
Sep 25 '15: KM - 46180, Soh - 98%, Charges - 95 QC 980 L1/L2, Gidds - 288, kWh - 22.3, Soc - 97.4, Hx - 98.21%, Ahr - 61.10 / 59.53
Oct 4'15: KM - 47258, Soh - 100%, Charges - 100 QC 1000 L1/L2, Gidds - 291, kWh - 22.6, Soc - 97.1, Hx - 97.02%, Ahr - 62.93 / 61.09
Nov 15 '15: KM - 51224, Soh - 99%, Charges - 107 QC 1083 L1/L2, Gidds - 292, kWh - 22.6, Soc - 97.4, Hx - 95.91%, Ahr - 62.04 / 60.45
Feb 28 '16: KM - 60257, Soh - 99%, Charges - 111 QC 1337 L1/L2, Gidds - 292, kWh - 22.6, Soc - 97.1, Hx - 96.21%, Ahr - 62.08 / 60.28
April 11 '16: KM - 64546, Soh - 97%, Charges - 124 QC 1430 L1/L2, Gidds - 285, kWh - 22.1, Soc - 97.2, Hx - 93.73%, Ahr - 60.72 / 59.04


Well my numbers are starting to drop, had some Soh saying 96% too but didn't have it readings at a full charge.

Date: 4/18/2016
Mileage: 24590
0 QC & 1132 L1/L2s

GIDs 289
kWh: 22.4
SOC: 97.3
SOH: 98
Hx: 94.98
Ahr: 61.48
Avg Battery Temp: 73 F

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

I would say if anyone is getting 21-22 Kwh from the 2015 then the their battery is doing fine.

When my leaf sits for a few days or drives little mileage the reported AH, health and Gids drop. When I'm driving it daily for commuting, 85 miles round trip, the stats climb back up to 66.7 AH after 22,000 miles.

I think DC and 6.6 Kw charging also help the reported stats to climb back up but mostly I think the more you use it the more it will report higher AH, Kwh, Gids etc.

I was off shift for a week just last week and the AH went from 66.7 - 62.5 from sitting and the Health from 100% to 95% now it's climbing back up and at 63.5 ah and 97% health.

Ah was 21 Kwh now 21.5 on a 100% charge.

I drive the Leaf pretty hard and don't baby it.

Most recent reading - 2015 S/QC, just shy of 28K miles, mfg 4/14

279 GIDS
21.62 kwh
97.35% SOC
89.44% SOH
91.31% HX
59.26 ahr
73.4 degrees

All in all, pretty happy with this considering I'm in the South Bay in CA and the car is 2 years old as of this month. I know that many people are criticizing the "lizard" packs, but if roughly 5% degradation at 2 years and nearly 30K miles is all that can be expected, then I think that's pretty good.

tkdbrusco said:

but if roughly 5% degradation at 2 years and nearly 30K miles is all that can be expected, then I think that's pretty good.

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How are you getting 5%?

If you look at GIDs, the capacity loss is negligible.
If you look at AHrs, you're down about 10%.

Draining it to turtle and measuring the energy to recharge is probably the only way to confirm.

I'm looking at GIDS vs new, 292 to 279 is roughly 5% down. My Ahr was never above 64 even when new, so with that I'm maybe down 7-8%. Unless there's hidden capacity above 292 Gids that is being eaten away at, which is a possibility, how else should I measure my capacity loss? If my decline continues to be linear for the next year or so, what else am I to assume?

My point is that I'm still a good ways away from losing a bar and the car is 2 years old and has nearly 30K miles. I ran a test on my buddy's 2013 with 30K miles (mfg 7/13, so its only 9 months older than my car) and his max GIDS were 249. So I have to assume that the 2015 Lizard is definitely an improvement.

tkdbrusco said:

I'm looking at GIDS vs new, 292 to 279 is roughly 5% down. My Ahr was never above 64 even when new, so with that I'm maybe down 7-8%. Unless there's hidden capacity above 292 Gids that is being eaten away at, which is a possibility, how else should I measure my capacity loss? If my decline continues to be linear for the next year or so, what else am I to assume?

My point is that I'm still a good ways away from losing a bar and the car is 2 years old and has nearly 30K miles. I ran a test on my buddy's 2013 with 30K miles (mfg 7/13, so its only 9 months older than my car) and his max GIDS were 249. So I have to assume that the 2015 Lizard is definitely an improvement.

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Didn't you use your leaf a lot like I suggested and the numbers climbed ? AH, Gids etc Maybe it wasn't you, can't remember.

Here's my stats from today. Last week I saw 62.4 AH and 95% because the car was sitting for a day or two and for the other 2 days wasn't used much.

Converted to miles is 22,638.

In the last month my GIDs have gone from 292 to 273 and back to 288. Ahr from 64.38 to 58.23 and back to 61.27. kWh from 22.6 to 21.2 and back to 22.3. All readings taken at 50 to 70 degrees F. I think there was some correlation to mileage put on between charges. As long as it keeps coming back, I don't mind. I don't really need much range anyway. Two years since MFG so it should have some degradation, but overall it's holding up well.

Drove a lot, for me, yesterday, 72 miles, over 50 miles on the highway tooling along in the left lane at 80 with everybody else, (supplemented with destination charging) and now it's back to 292 GIDs, but not full AHrs.

It says you got 22.6 Kwh, so then your battery is perfect.

Ah, Gids, health % etc etc will all improve with a lot of driving and charging not necessarily DC charging, but it helps, I charge at 6.6 Kw in work and it does help and helps warm the battery up a bit too.

The only true way to know is to charge 100 % until all the charge lights go out and drive it until the battery is dead and look at how many Kwh leaf spy says you used but I don't think you need to, your battery looks perfect.

Seems like nobody cares about this thread anymore, but here's my readings from this morning on my 2015 S (mfg/4/14) Mileage just hit 29K today.

277 GIDS
21.47 kwh
97.19% SOC
89.05% SOH
90.89% HX
59.0 Ahr
78.8 degrees

Depending on how you read this and what you base the degradation on, it is either down 5.2% (based on GIDS), 11% (based on SOH), down 9% (based on HX or Ahr). I'd be willing to bet that there was some hidden capacity in there that has been eaten away at as the battery degrades, so I'll put it somewhere closer to the 9%.

That doesn't seem bad for where you live. My numbers bounce around a lot, but I suspect about 60 Ah, 280 GIDs, and just under 22 kWhs is where it's really at. Should be good enough for the last year of this lease.

DNAinaGoodWay said:

That doesn't seem bad for where you live. My numbers bounce around a lot, but I suspect about 60 Ah, 280 GIDs, and just under 22 kWhs is where it's really at. Should be good enough for the last year of this lease.

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Yeah I agree. I'm reasonably pleased with the minimal degradation I have experienced. I'm also in Morgan Hill (which is south of San Jose and a bit warmer). My main concern is that the benefit from the lizard comes mosts as a result of hidden capacity that is eaten away as the pack degrades. This may explain why people experience 292 GIDS from 66-63 Ahr. So if the pack is eating away at this hidden capacity first, then we can assume that 9% of degradation is more accurate for my car, meaning that I'll be losing bar #1, at about 50K miles or so, and losing roughly 4.5% per year at 15K miles/year. This linear decline would put me at 18% loss at 60K miles, and about 25% loss at 100K miles. Not awful, but better than 11/12 cars. It doesn't matter though. I'll be selling it regardless of depreciation when my Model 3 arrives.

tkdbrusco said:

DNAinaGoodWay said:

It doesn't matter though. I'll be selling it regardless of depreciation when my Model 3 arrives.

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I agree, but in my case I will be giving it to my now middle-schooler, then high-schooler, for him to drive to school. :mrgreen:

I'm in the burbs of Atlanta, and I park in a garage at home and a basement at work. The only time my car sees the sun is when I drive home in the evenings. Also, my 60 mile daily commute does not exceed 40 mph. Let me see how many miles I can put on this bad boy!

I actually wouldn't mind keeping it. My commute is 54 miles RT and even though I can't charge at work, I think the Leaf will be able to do that commute for a long time coming, even in winter. My guess is that once I lose 3 bars (which should be a while), the 54 will become a challenge. The biggest factor on whether I keep the car or not, will be whether or not they offer a 30kwh replacement option. If this option exists by the time my Model 3 (or I should say my wife's model 3, cause she'll be driving it), then I'll likely hold onto the leaf.

Haven't posted stats in a few months. Over the winter I hit a low of 274 GIDs and 93% SOH. Now that things have warmed up a bit in Georgia those stats have come back up, even if only slightly. 2015 S w/QC, leased Dec. 2014 and now has 15,567 miles.

GIDs 275
kWh 21.3
SOC 95.9
SOH 95
Hx 91.85
AHr 59.58
Avg Temp 83.4
# QCs 42
GOM at full 98 miles