nightleaf
Posts: 17
Joined: Mon Apr 23, 2018 8:08 am
Delivery Date: 29 Mar 2018
Location: BC, Canada

Re: The 40KWH Battery Topic

Tue Sep 01, 2020 9:57 pm

So I just did another trip from Richmond, BC to Whistler, BC in Aug 2020, started with 100%batt and ended the trip with 33% remaining.
The same trip in Aug 2018 resulted in 35%remaining, the weather conditions were very similar, no a/c used and the same 4 people in the car... my son is about 20lbs heaver now but everyone else the same.

Even though the SOH shows a significant drop (almost 10% between the two trips), I did not seem much difference in range... I am not convinced the SOH leafspy reading is an accurate representation of the remaining capacity.

The return trip was also very similar, about 47% used for each return trip.

Aug 01, 2018 - Km; 08,495 Ahr; 112.20 SOH; 97.19; HX 114.89
Oct 21, 2019 - Km; 35,500 Ahr; 104.06 SOH; 90.61; HX 116.48
Aug 28, 2020 - Km; 46,751 Ahr; 102.11 SOH; 88.45; Hx 113.38
2018 Leaf SV - 3/18 build date, 3/30/18 In service date

DaveinOlyWA
Posts: 15067
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The 40KWH Battery Topic

Wed Sep 02, 2020 6:19 am

nightleaf wrote:
Tue Sep 01, 2020 9:57 pm
So I just did another trip from Richmond, BC to Whistler, BC in Aug 2020, started with 100%batt and ended the trip with 33% remaining.
The same trip in Aug 2018 resulted in 35%remaining, the weather conditions were very similar, no a/c used and the same 4 people in the car... my son is about 20lbs heaver now but everyone else the same.

Even though the SOH shows a significant drop (almost 10% between the two trips), I did not seem much difference in range... I am not convinced the SOH leafspy reading is an accurate representation of the remaining capacity.

The return trip was also very similar, about 47% used for each return trip.

Aug 01, 2018 - Km; 08,495 Ahr; 112.20 SOH; 97.19; HX 114.89
Oct 21, 2019 - Km; 35,500 Ahr; 104.06 SOH; 90.61; HX 116.48
Aug 28, 2020 - Km; 46,751 Ahr; 102.11 SOH; 88.45; Hx 113.38
Single trips can't be used as the margin of error can be very large. I would suggest something you do regularly that is at least 100 miles in length. Need to have had at least 5-10 trips and the more you have, the better. You will quickly see that the 9% variance in SOH is easily overcome by the variances of the trips made.

However, your comment on SOH not being a realistic picture of battery capacity has merit. As we know, sometimes adjustments go up which is realistically not possible suggesting that SOH has become a sort of report card for your driving behavior or better yet; an algorithm that adjusts battery capacity based on driver habits. More for people who stretch the range, less for people who rarely need it to enhance long term viability.

Either way, its obvious these adjustments are not as they appear to be.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 13,705 mi, 93.41% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

nightleaf
Posts: 17
Joined: Mon Apr 23, 2018 8:08 am
Delivery Date: 29 Mar 2018
Location: BC, Canada

Re: The 40KWH Battery Topic

Wed Sep 02, 2020 10:58 am

Agree with your margin of error comment, the issue is I never do any trips longer than 100Mi other that this one from Richmond to Whistler, which is about 145KM (90Mi), I have done two other trips in between and very similar results..,

[/quote]
Single trips can't be used as the margin of error can be very large. I would suggest something you do regularly that is at least 100 miles in length. Need to have had at least 5-10 trips and the more you have, the better. You will quickly see that the 9% variance in SOH is easily overcome by the variances of the trips made.

However, your comment on SOH not being a realistic picture of battery capacity has merit. As we know, sometimes adjustments go up which is realistically not possible suggesting that SOH has become a sort of report card for your driving behavior or better yet; an algorithm that adjusts battery capacity based on driver habits. More for people who stretch the range, less for people who rarely need it to enhance long term viability.

Either way, its obvious these adjustments are not as they appear to be.
[/quote]
2018 Leaf SV - 3/18 build date, 3/30/18 In service date

SageBrush
Posts: 5280
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: The 40KWH Battery Topic

Wed Sep 02, 2020 6:33 pm

nightleaf wrote:
Wed Sep 02, 2020 10:58 am
Agree with your margin of error comment,
Why invoke error when there is wind ?
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

danrjones
Posts: 756
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Tue Sep 08, 2020 1:32 pm

My 2018 is in the middle of an adjustment.
Normally I try and get a leaf-spy reading every day for a few days leading up to the adjustment, but this time I was not able to do so, as I was out of town and my wife was using it. So my last reading was about 5-6 days before it started. I'm not going to put all my readings just the last two before the adjustment and the current two from yesterday and today. My guess would be that SOH was around 89.28. This is the first time my SOH has ever increased in either a 3 month adjustment or the daily adjustments.

Date | SOH | AMPhr | Hx

8/28/2020 89.31 103.10 108.18
8/31/2020 89.30 103.09 108.11
9/7/2020 89.46 103.27 107.97
9/8/2020 89.87 103.75 107.84
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

DaveinOlyWA
Posts: 15067
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The 40KWH Battery Topic

Tue Sep 08, 2020 7:08 pm

More is always a good thing.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 13,705 mi, 93.41% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

DougWantsALeaf
Posts: 2097
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: The 40KWH Battery Topic

Tue Sep 08, 2020 8:06 pm

Congrats. The BMS taketh..but every once in a while giveth.
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

HerdingElectrons
Posts: 188
Joined: Sat Sep 08, 2018 3:20 pm
Delivery Date: 17 Sep 2018
Location: Central Coast, Ca

Re: The 40KWH Battery Topic

Wed Sep 09, 2020 8:36 am

I'm hitting two years of ownership & just broke 30K miles & I'm at 90.96 SOH
2018 SL Pearl White 4.5/3.9 Warm/Cold weather

09/18, 01K mi: AHr= 114.52 / SOH= 99.20 / HX= 099.70%
04/19, 10K mi: Ahr= 111.45 / SOH= 96.54 / HX= 113.82%
11/19, 20K mi: Ahr= 107.44 / SOH= 93.07 / HX= 109.96%

danrjones
Posts: 756
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Wed Sep 09, 2020 10:21 am

DougWantsALeaf wrote:
Tue Sep 08, 2020 8:06 pm
Congrats. The BMS taketh..but every once in a while giveth.
It certainly is a strange system that Nissan coded. Taking it away only to give it back, assuming we are looking at data that's actually useful and valid in the first place.

Still going up as of this AM. Will post again when the 3 month adjustment is complete.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

WetEV
Posts: 4006
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: The 40KWH Battery Topic

Wed Sep 09, 2020 12:35 pm

danrjones wrote:
Wed Sep 09, 2020 10:21 am
DougWantsALeaf wrote:
Tue Sep 08, 2020 8:06 pm
Congrats. The BMS taketh..but every once in a while giveth.
It certainly is a strange system that Nissan coded. Taking it away only to give it back, assuming we are looking at data that's actually useful and valid in the first place.

Still going up as of this AM. Will post again when the 3 month adjustment is complete.
Nothing real was taken away. The estimate changed, that's all.

SOC is an estimate. Accurate to a couple of percent at best, readout to 4 significant digits is misleading at best.
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

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