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jhm614
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Posts: 861
Joined: Fri Apr 23, 2010 7:48 pm
Delivery Date: 30 Mar 2011
Leaf Number: 000493
Location: Arlington, TX

Re: How long 'til 4th bar drops?

Sun Jun 18, 2017 5:50 am

setof4 wrote:With the current hot weather in the bay area the 9th bar dropped today. The stats are:

2013 S with no charge package
Mfg Date: 02/2013
Ahr: 40.05
Odo: 53,568

Sorry for your loss but congrats on impending new battery. Don't accidentally go over the 60k mile limit before getting the new battery installed...
2011 Brilliant Silver SL - 105,000 gasoline free miles so far.
4BL: 06/29/13 @ 27 months, 43,520 miles, 42.56 Ahr. New 12 bar battery: 09/09/13
4BLx2:12/31/16 @ 69 months, 99,475 miles, 42.99 Ahr.

sandeen
Posts: 29
Joined: Fri May 12, 2017 1:45 pm
Leaf Number: 026685

Re: How long 'til 4th bar drops?

Sun Jun 18, 2017 8:02 am

setof4 wrote:With the current hot weather in the bay area the 9th bar dropped today. The stats are:

2013 S with no charge package
Mfg Date: 02/2013
Ahr: 40.05
...


Wow, that may be the lowest Ahr I've seen. Which worries me a little ;)
2012 SL, used

sandeen
Posts: 29
Joined: Fri May 12, 2017 1:45 pm
Leaf Number: 026685

Re: How long 'til 4th bar drops?

Sun Jun 18, 2017 9:17 am

This question may be better for another forum, but maybe someone can post a link to an existing answer: of the 3 stats people pay attention to here, Ahr, Hx, and SOH - are those all interpreted by LeafSpy, or are they more or less direct readings from values in the car? Meaning, how much of these numbers are reverse-engineered guesswork by the LeafSpy author? There is very little documentation about what's actually behind these values.
2012 SL, used

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drees
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Re: How long 'til 4th bar drops?

Sun Jun 18, 2017 11:56 pm

sandeen wrote:Wow, that may be the lowest Ahr I've seen. Which worries me a little ;)

It seems that most '11-12 LEAFs drop the 4th bar at a higher SOC. Mine dropped at 43.3 AHr, for example. So I think that you have a good chance of making the warranty period.

sandeen wrote:3 stats people pay attention to here, Ahr, Hx, and SOH - are those all interpreted by LeafSpy, or are they more or less direct readings from values in the car?

AHr/Hx are directly from the car. I believe that SOH is a derived value based on the current AHr reading and 65 AHr or so - if not in LeafSpy it's done in the car, but I could be wrong. I wouldn't worry about that value, anyway - all you really care about is AHr.
'11 LEAF SL Powered By 3.24 kW Enphase Solar PV

cwerdna
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Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: How long 'til 4th bar drops?

Mon Jun 19, 2017 1:42 am

drees wrote:AHr/Hx are directly from the car. I believe that SOH is a derived value based on the current AHr reading and 65 AHr or so - if not in LeafSpy it's done in the car, but I could be wrong. I wouldn't worry about that value, anyway - all you really care about is AHr.

I'm not sure about the bolded part. Here are some old posts from Turbo3. From searches (not reading threads and posts in detail), it looks like:

old Hlth got renamed to Hx
SOH is a newer value

viewtopic.php?f=44&t=12098&p=307174&hilit=health#p307174
viewtopic.php?p=329843#p329843
viewtopic.php?f=44&t=4131&p=337560&hilit=soh#p337560
viewtopic.php?f=44&t=14285&p=337612&hilit=soh#p337612
viewtopic.php?f=44&t=14285&p=342294&hilit=Hlth#p342294

'13 blue Leaf SV w/premium package (owned)
'13 blue Leaf SV w/QC + LED & premium packages (lease over, car returned)
'06 Prius

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drees
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Re: How long 'til 4th bar drops?

Tue Jun 20, 2017 1:46 am

cwerdna wrote:
drees wrote:AHr/Hx are directly from the car. I believe that SOH is a derived value based on the current AHr reading and 65 AHr or so - if not in LeafSpy it's done in the car, but I could be wrong. I wouldn't worry about that value, anyway - all you really care about is AHr.

I'm not sure about the bolded part. Here are some old posts from Turbo3. From searches (not reading threads and posts in detail), it looks like:

old Hlth got renamed to Hx
SOH is a newer value

Everything that I can see shows that SOH is current AHr / 66.25 and calculated in LeafSpy. 66.25 AHr is the assumed capacity of a new battery.

Health => Hlth => Hx in LeafSpy.

Just grab a couple random LeafSpy screenshots and run the calculation and you'll see that the "new" capacity of a 24 kWh LEAF is 66.25 AHr.
'11 LEAF SL Powered By 3.24 kW Enphase Solar PV

sandeen
Posts: 29
Joined: Fri May 12, 2017 1:45 pm
Leaf Number: 026685

Re: How long 'til 4th bar drops?

Tue Jun 20, 2017 9:50 am

More fun with charts; here's what I see for 4th bar drop by model year for Ahr & Hx. I only included ones for which I could find the forum post, not everything on the wiki. Clearly the 2013s behave differently, with the 4th bar drop at lower Ahr & higher Hx... There are a few weird outlier numbers, too. In particular co2112's numbers seem pretty far out of the normal range. Google sheet is here
(Edit: Updated with a few more entries I found. Far more 2011s than 2012, though perhaps that's expected simply due to age. 2012s have a wider range on Ahr. Come on 2012's, show me what you've got!) :)
(Last update: Removed co2112's outlier numbers, they were drop to 9th bar not drop of 9th bar, AFAICT; added a few more stats I found)
Image
Image
Last edited by sandeen on Sat Jun 24, 2017 2:43 pm, edited 2 times in total.
2012 SL, used

Reddy
Posts: 1383
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Leaf Number: 006828
Location: Pasco, WA

Re: How long 'til 4th bar drops?

Tue Jun 20, 2017 10:18 am

sandeen wrote:More fun with charts; here's what I see for 4th bar drop by model year for Ahr & Hx. I only included ones for which I could find the forum post, not everything on the wiki. Clearly the 2013s behave differently, with the 4th bar drop at lower Ahr & higher Hx... There are a few weird outlier numbers, too. In particular co2112's numbers seem pretty far out of the normal range. Google sheet is here
Image
Image
THANKS! That's a great summary.
Reddy
2011 SL; 9 bar, 46.44 AHr; 40,067 mi; rcv'd Aug 18, 2011
Long: http://www.mynissanleaf.com/viewtopic.p ... al#p226115"
Cold: http://www.mynissanleaf.com/viewtopic.p ... 60#p243033"

sandeen
Posts: 29
Joined: Fri May 12, 2017 1:45 pm
Leaf Number: 026685

Re: How long 'til 4th bar drops?

Tue Jun 20, 2017 11:55 am

Meanwhile, my numbers are inexplicably improving. It gained about 0.25aHr sitting over night a couple days ago. :mad:
2012 SL, used

chaz
Posts: 14
Joined: Tue Nov 15, 2016 10:02 pm
Delivery Date: 01 Jul 2016
Leaf Number: 405678
Location: Salt Lake City, UT

Re: How long 'til 4th bar drops?

Fri Jul 14, 2017 2:56 pm

Just dropped my 4th bar!
Last Sunday 7/9/2017 4/2013 leaf SL, was a southern cali car that we bought used in Utah last year 7/1/2016 with only 2 bars missing. Utah summer heat did it in. Leaf Spy: AHr = 42.10 SOH = 64% Hx = 57.69 39k miles, 1814 L1 charges
I still had 8 mo left on the warranty! Dealer got approval for the replacement no problem. Just waiting 4 weeks for the battery to come in.
Electric Ninja http://evalbum.com/preview.php?vid=5243
Mar 2013 Leaf SV SOH 73% Hx 68% 3 Bars missing
6hp E snowblower http://evalbum.com/preview.php?vid=5250

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