The 40KWH Battery Topic

SageBrush said:

This is my pampered 'Wolf' pack over the past 27 months...

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Your last year is very nice!

DaveinOlyWA said:

SageBrush said:

This is my pampered 'Wolf' pack over the past 27 months...

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Your last year is very nice!

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I mostly think so too, although I lost my 12th capacity bar last month. I'm inclined to think that is just a reflection of my 81% Hx falling faster than the 85% SOH. I'll know for sure in a year, and if I ever get my act together I'll validate LeafSpy with a charge test.

Similar to what others with 40kWh packs have reported, I saw a sharp drop in my AHr readings after remaining relatively flat for months.

I leased a 2018SV in March 2019, according to the dealer it had sat on the lot for about 14 months. When I first brought it home it showed 97.5% SOH and 112.5Ahr. It stayed essentially the same April and May but my June measurement showed a decline to 95.4% SOH and 110.1AHr. The June reading was taken when the car had 2150 miles, 13 QCs, and 91 L1/L2 charges reported on it by Leafspy Pro.

I will take my July measurement next week.

golfcart said:

Similar to what others with 40kWh packs have reported, I saw a sharp drop in my AHr readings after remaining relatively flat for months.

I leased a 2018SV in March 2019, according to the dealer it had sat on the lot for about 14 months. When I first brought it home it showed 97.5% SOH and 112.5Ahr. It stayed essentially the same April and May but my June measurement showed a decline to 95.4% SOH and 110.1AHr. The June reading was taken when the car had 2150 miles, 13 QCs, and 91 L1/L2 charges reported on it by Leafspy Pro.

I will take my July measurement next week.

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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...

Here is a table of my data so far. Didn't get a lot of measurements the last month but since it had already taken its big drop I don't think it mattered.

Date SOH AMPHr Hx
5/3/2019 97.63 112.7 97.5
5/6/2019 97.62 112.69 97.94
5/7/2019 97.61 112.68 98.03
5/10/2019 97.6 112.67 98.39
5/13/2019 97.59 112.66 98.55
5/15/2019 97.58 112.65 98.73
5/19/2019 97.57 112.63 98.84
5/27/2019 97.55 112.61 99.27
6/1/2019 97.53 112.59 99.61
6/4/2019 97.5 112.55 100.12
6/11/2019 97.44 112.48 101.03
6/12/2019 97.43 112.47 101.25
6/13/2019 97.42 112.46 101.25
6/14/2019 96.49 111.39 101.58
6/15/2019 96.28 111.15 101.58
6/16/2019 95.64 110.41 101.67
6/17/2019 95.42 110.15 101.82
6/19/2019 95.4 110.13 102.15
6/20/2019 95.38 110.11 102.25 (Insert Earthquake somewhere in here)
7/15/2019 95.19 109.89 103.22

DaveinOlyWA said:

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...

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I thought I had done it on the 20th of each month previously but I looked back and it was the 15th so I went ahead and took the measurement.

You are close, it dropped about 0.4% for July to 109.64AHr. We have had a brutally hot July so far in the mid-Atlantic so I'm sure that's not helping.

Date AHr TemperatureF
3/15/19 112.52 69.1
4/15/19 112.45 75.2
5/15/19 112.37 82.2
6/15/19 110.11 90.8
7/15/19 109.64 97.0

So in 10 months & 14K miles I have lost 3.45% capacity. I'm expecting around 5% total loss once summer is over & hoping for a tapering loss afterwards.

Car is garaged on the eastern side of the home, only L2 charging typically to 75-90% on any given day & try to keep the SOC under 75% if using the car less but it is driven almost daily hence the mileage.

Battery stats in my signature.

'18 SL centered around the 93422 zip code for weather analysis.

https://www.bestplaces.net/climate/zip-code/california/atascadero/93422

I recently purchased a used 2018 Nissan Leaf SV here in central Florida from a Toyota dealership with 29,549 miles. (Traded in Honda Civic Si) I negotiated the price down from $20.9K to $18.5K. I'm somewhat new to electric cars, so I didn't have Leaf Spy until after the purchase. The previous owner used QCs a lot. I now have 31,359 miles on the vehicle. I routinely drive about 800 miles a week, 60% city/40% highway. I average 12 level 2 charges a week. Since I've had the vehicle I've performed 2 QCs. I like the car but I'm slowly realizing it doesn't quite fit my needs. Highway driving efficiency is horrible above 65 mph. I usually have 4.2 miles/kWh. I'm not an aggressive driver. Long term I don't think it can keep up with the demand I put on it along with the Florida high temperatures. At the end of a lot of my drives I have 15-20 miles left according to the GOM. I lose about 0.01 worth of SOH every day according to Leaf Spy. I charge to 100% due to the needed range. I'm thinking about trading it in for a Tesla Model 3 before the end of the year before the car gets any worse. Here are my Leaf Spy stats today:

ODO: 31,359
GIDs: 445
kWh remaining: 34.5
AHr: 103.90
SOH: 90.00
SOC: 96.8
Voltage: 403.01
Hx: 98.33
QC: 459
L1/L2: 417

I’m experiencing very similar degrading.
Purchased a new ‘18 SV two months ago at 95.95 SOH.
Car was sitting in the lot for about a year in Des Moines, IA. Where we had that polar vortex in the winter and car was outside.
As of now my SOH is 95.69. So dropping about .01 every other day.

I bought the car 11,500 off plus whatever I get for the fed tax credit. So was very happy at the time.

I hate to see this gradual degradation. I’m hoping battery technology will advance and replacement will be lower than $9500 when the time comes. I sure wish there was a way to install thermal cooling system.

Also stay within 35-75 SOC. No rapid charging. Mostly public charging.

Lw4nier said:

As of now my SOH is 95.69. So dropping about .01 every other day.
I hate to see this gradual degradation.

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Heh. That rate is *outstanding* for a LEAF
Most owners see 3x - 5x that rate

In the British EV site I am on, they said Tesla posts guidelines of 10% degradation in the first 2 years and 5% additional in year 3.

Are the guidelines the same here?

Lw4nier said:

I’m experiencing very similar degrading.
Purchased a new ‘18 SV two months ago at 95.95 SOH.
Car was sitting in the lot for about a year in Des Moines, IA. Where we had that polar vortex in the winter and car was outside.
As of now my SOH is 95.69. So dropping about .01 every other day.

I bought the car 11,500 off plus whatever I get for the fed tax credit. So was very happy at the time.

I hate to see this gradual degradation. I’m hoping battery technology will advance and replacement will be lower than $9500 when the time comes. I sure wish there was a way to install thermal cooling system.

Also stay within 35-75 SOC. No rapid charging. Mostly public charging.

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You will likely not see as much degradation over the Winters. My 2018 was on track for about 8-10% a year last Fall, but there was virtually no drop recorded for the Winter, even after it warmed up this Spring. I ended up with less than 5%, IIRC. It's recorded in this topic.

DougWantsALeaf said:

In the British EV site I am on, they said Tesla posts guidelines of 10% degradation in the first 2 years and 5% additional in year 3.

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Show the guideline

Tesla’s warranty appears to be not more then 30% degradation in 100K miles. Drive train, high v. Battery, and everything else is 50K miles.

https://www.tesla.com/support/vehicle-warranty?redirect=no

Speakev.com had the 10% in 3 years and 15% in 3, but I don’t see that anywhere on the Tesla site.

DougWantsALeaf said:

In the British EV site I am on, they said Tesla posts guidelines of 10% degradation in the first 2 years and 5% additional in year 3.

Are the guidelines the same here?

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Really?? I have never seen Tesla post anything "definitive" about degradation... Have a link?

DougWantsALeaf said:

Tesla’s warranty appears to be not more then 30% degradation in 100K miles. Drive train, high v. Battery, and everything else is 50K miles.

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My car is 120k miles battery warranty, but do not confuse warranty with owner experience which is much, much longer.
Please delete your earlier comment since it is factually incorrect

There’s a lot of misinformation on this site. This is my impression as someone new here.

Tortoisehead77 said:

There’s a lot of misinformation on this site. This is my impression as someone new here.

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Can you be more specific? Are you talking about posts about Tesla, or about other things?

LeftieBiker said:

Tortoisehead77 said:

There’s a lot of misinformation on this site. This is my impression as someone new here.

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Can you be more specific? Are you talking about posts abut Tesla, or about other things?

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+1

If whatever you find is misinformation, if you have the time, please try to correct it. Misinformation bothers me a lot as well.

MNL is nowhere near as bad as on various Leaf Facebook groups I'm on, where often, tons of people will chime in w/wrong info. And, their threading UI and notifications leaves a LOT to be desired, leading to it being very difficult to follow and lots of duplicate answers (and dupe followup questions). Also, some threads quickly "blow up" w/WAY too many (often dupe) questions and (wrong and dupe) answers, so I just give up on those and move on.

I could make a decent income if I received a $1 for each of those wrong responses. I've posted a few example peeves on this before:
http://mynissanleaf.com/viewtopic.php?p=533290#p533290
http://mynissanleaf.com/viewtopic.php?p=550128#p550128

2019 40kWh Leaf SV
Purchased Jun 2019
Mfg: Mar 2019

6/8/19:
AHr= 114.24
SOH= 98.96%
Hx= 97.66%
Odo= 15 mi
QC= 4
L1/L2= 2

8/3/19:
AHr= 113.21
SOH= 98.07%
Hx= 106.56%
Odo= 986 mi
QC= 4
L1/L2= 21