golfcart
Posts: 446
Joined: Mon Jan 04, 2016 6:08 am
Delivery Date: 21 Nov 2015
Location: Virginia Beach, VA

Re: The 40KWH Battery Topic

Tue Sep 17, 2019 4:08 am

I haven't seen that big 3 month drop. I had a decent sized drop from May to June after getting the car in mid-march but no corresponding August to September. I'll keep checking every month and post my results.

Date SOH% SOH %Chg Ahr Ahr %Chg TempF

3/15/19 97.47 -2.53% 112.52 -2.53% 69.1
4/15/19 97.41 -2.59% 112.45 -2.59% 75.2
5/15/19 97.34 -2.66% 112.37 -2.66% 82.2
6/15/19 95.38 -4.62% 110.11 -4.62% 90.8
7/15/19 94.98 -5.02% 109.64 -5.02% 97
8/15/19 94.63 -5.37% 109.24 -5.37% 101.8
9/15/19 94.41 -5.59% 108.99 -5.59% 92.2
2018 SV

danrjones
Posts: 390
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Tue Sep 17, 2019 6:13 am

It looks like you had one between may and June, but to know for sure you have to almost check daily.

Then again you could have a different bms software version. Who knows!
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

DaveinOlyWA
Posts: 14221
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 17, 2019 6:39 am

golfcart wrote:
Tue Sep 17, 2019 4:08 am
I haven't seen that big 3 month drop. I had a decent sized drop from May to June after getting the car in mid-march but no corresponding August to September. I'll keep checking every month and post my results.

Date SOH% SOH %Chg Ahr Ahr %Chg TempF

3/15/19 97.47 -2.53% 112.52 -2.53% 69.1
4/15/19 97.41 -2.59% 112.45 -2.59% 75.2
5/15/19 97.34 -2.66% 112.37 -2.66% 82.2
6/15/19 95.38 -4.62% 110.11 -4.62% 90.8
7/15/19 94.98 -5.02% 109.64 -5.02% 97
8/15/19 94.63 -5.37% 109.24 -5.37% 101.8
9/15/19 94.41 -5.59% 108.99 -5.59% 92.2
:shock:

Holy sheepdip! Hate to see your definition of a big drop...

I would put nothing into these readings. I fear that Nissan has changed BMS programing to thwart LEAF Spy. FYI; the adjustment doesn't always go down.
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; 412 mi, 99.72% SOH
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golfcart
Posts: 446
Joined: Mon Jan 04, 2016 6:08 am
Delivery Date: 21 Nov 2015
Location: Virginia Beach, VA

Re: The 40KWH Battery Topic

Tue Sep 17, 2019 7:16 am

DaveinOlyWA wrote:
Tue Sep 17, 2019 6:39 am
golfcart wrote:
Tue Sep 17, 2019 4:08 am
I haven't seen that big 3 month drop. I had a decent sized drop from May to June after getting the car in mid-march but no corresponding August to September. I'll keep checking every month and post my results.

Date SOH% SOH %Chg Ahr Ahr %Chg TempF

3/15/19 97.47 -2.53% 112.52 -2.53% 69.1
4/15/19 97.41 -2.59% 112.45 -2.59% 75.2
5/15/19 97.34 -2.66% 112.37 -2.66% 82.2
6/15/19 95.38 -4.62% 110.11 -4.62% 90.8
7/15/19 94.98 -5.02% 109.64 -5.02% 97
8/15/19 94.63 -5.37% 109.24 -5.37% 101.8
9/15/19 94.41 -5.59% 108.99 -5.59% 92.2
:shock:

Holy sheepdip! Hate to see your definition of a big drop...

I would put nothing into these readings. I fear that Nissan has changed BMS programing to thwart LEAF Spy. FYI; the adjustment doesn't always go down.
I haven't seen that big 3 month drop

I had a big drop from May to June, did not see one 3 months later from August to September... unless you consider going from 109.24 Ahr to 108.99 Ahr a big drop.

You had posted this back in July that you expected updates to happen every 90 days... which I did not see.
DaveinOlyWA wrote:
No rush. Adjustments come every 90 days. You can simply wait till Sept. I will say a .15-.25% loss in July with same for August...
Last edited by golfcart on Tue Sep 17, 2019 7:20 am, edited 1 time in total.
2018 SV

danrjones
Posts: 390
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Tue Sep 17, 2019 7:18 am

Which one doesn't always go down?

My Hx doesn't always go up. It just ticked down very slightly the last two days. SO FAR my SOH always has gone down.

But I agree, its all so artificial, I think its a BMS software thing more than real battery degradation.
It did cause me to ask if Nissan, or any company for that matter, has the right to artificially reduce your battery life.
I pointed out apple was caught doing essentially that to phones.

I have a nice plot of my SOH including the two drops but I guess I can't directly post it.

It also makes me wonder if the SOH we are all watching in leafspy is even a good measure of the battery health bars in the 2018/2019s.
I tried finding the battery health bar in the the manual to see what they said about it and actually couldn't find it. It seems it was only called out by name in the warranty.
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LeftieBiker
Moderator
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Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: The 40KWH Battery Topic

Tue Sep 17, 2019 12:50 pm

Which one doesn't always go down?

With previous generation battery packs, the SOH will go up occasionally, like after a QC session. We do have one lonely instance of a 40kwh pack SOH going up - a little, once.
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DaveinOlyWA
Posts: 14221
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 17, 2019 1:17 pm

danrjones wrote:
Tue Sep 17, 2019 7:18 am
Which one doesn't always go down?

My Hx doesn't always go up. It just ticked down very slightly the last two days. SO FAR my SOH always has gone down.

But I agree, its all so artificial, I think its a BMS software thing more than real battery degradation.
It did cause me to ask if Nissan, or any company for that matter, has the right to artificially reduce your battery life.
I pointed out apple was caught doing essentially that to phones.

I have a nice plot of my SOH including the two drops but I guess I can't directly post it.

It also makes me wonder if the SOH we are all watching in leafspy is even a good measure of the battery health bars in the 2018/2019s.
I tried finding the battery health bar in the the manual to see what they said about it and actually couldn't find it. It seems it was only called out by name in the warranty.
My SOH and ahr has either stayed the same or went down EVERY TIME except my July adjustment when they went up gaining 1¼%.
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; 412 mi, 99.72% SOH
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danrjones
Posts: 390
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Tue Sep 17, 2019 1:19 pm

LeftieBiker wrote:
Tue Sep 17, 2019 12:50 pm
Which one doesn't always go down?

With previous generation battery packs, the SOH will go up occasionally, like after a QC session. We do have one lonely instance of a 40kwh pack SOH going up - a little, once.
I have this picture in my head of some tech guy as Nissan sitting around laughing at us for watching leafspy every day.

But those battery health bars must be connected to something. When Nissan does a service, what exactly do they print out and give you?
I read here somewhere that someone had a five star battery rating. Is that all you get?
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

goldbrick
Posts: 635
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: The 40KWH Battery Topic

Tue Sep 17, 2019 1:32 pm

You only get a number of stars. It's a lame readout although AFAIK, no one knows what information Nissan actually receives. One would think they would get a lot of logs of usage, etc but they don't share anything with the customer. It's possible the dealer doesn't even see that data and that it just goes back to some data base in Nissan HQ or something.

danrjones
Posts: 390
Joined: Wed Apr 17, 2019 8:02 am
Delivery Date: 17 Jun 2019
Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Tue Sep 17, 2019 1:44 pm

So until someone loses bar #1 on a 2018 or 2019, we have no real idea if SOH in leafspy is working.

Anyone loose a bar yet? Someone who bought early in 2018?
When were the first 2018's delivered? That means 1.5 or almost 2 years in, no one has lost a bar.
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