tuningin
Posts: 59
Joined: Fri Jan 19, 2018 2:50 pm
Delivery Date: 19 Jan 2018
Location: Southern California

Yikes, degradation is looking bad (2018 Leaf)

Tue Apr 24, 2018 6:18 pm

At 3000 miles, according to LeafSpy I’ve already lost 2.7%. It’s not even summer yet. Average temp of 70 degree ambient. Average battery temp 82 degrees. No DCFC. Usually charging to 80% with weekly 100% to cell balance and immediately driving so it doesn’t stay at hat high SOC.
Daily Commuter:
2018 Nissan Leaf SV w/Tech

Other Car:
2018 Tesla Model 3 LR

cwerdna
Posts: 8405
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Yikes, degradation is looking bad

Tue Apr 24, 2018 7:45 pm

I think it's way too early to tell. SOH, Hx and AHr numbers are fluctuate a bit and can be manipulated up/down a bit, at least on pre-18's.

We'll have a better idea after either '18s have passed thru 2 summers in hot/warmer climates or when we hear of the 1st capacity bar loss. Will be very interested to see how '18 Leafs in Phoenix, Texas and Florida do esp. compared to the '16 30 kWh batteries.

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

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

LeftieBiker
Posts: 9837
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Yikes, degradation is looking bad

Tue Apr 24, 2018 9:16 pm

I think that if we see 10+% drops in SOH this Summer, that will be enough of a harbinger for most people.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

SageBrush
Posts: 2926
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: Colorado

Re: Yikes, degradation is looking bad

Tue Apr 24, 2018 9:49 pm

I agree, way too early to say.
The battery temp 12F over ambient though is the worrisome number.
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Car is now enjoying an easy life in Colorado
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

powersurge
Posts: 1127
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: Yikes, degradation is looking bad

Wed Apr 25, 2018 5:30 am

SageBrush wrote:I agree, way too early to say.
The battery temp 12F over ambient though is the worrisome number.


yes, it is too early.

12 degrees over ambient is nothing. maybe he just charged... Darn if you are worried about the battery being at 82 degrees, then how do you sleep at night...

tuningin
Posts: 59
Joined: Fri Jan 19, 2018 2:50 pm
Delivery Date: 19 Jan 2018
Location: Southern California

Re: Yikes, degradation is looking bad

Wed Apr 25, 2018 6:13 am

powersurge wrote:
SageBrush wrote:I agree, way too early to say.
The battery temp 12F over ambient though is the worrisome number.


yes, it is too early.

12 degrees over ambient is nothing. maybe he just charged... Darn if you are worried about the battery being at 82 degrees, then how do you sleep at night...


No, that was the average over the entire trip. Not after charging. And I don’t use DCFC.

The concern is that the battery didn’t even see high temps and already has degradation.

If the delta is 12 degrees, imagine what it will be on a 95 degree day and over hot roads.

Maybe it is too early, but my daily trip is very consistent and the 20 kWh that I add everyday at the EVSE used to add 50% now adds 53% with each charge. 20% to 100% takes less kWh at the EVSE.
Daily Commuter:
2018 Nissan Leaf SV w/Tech

Other Car:
2018 Tesla Model 3 LR

WetEV
Posts: 2371
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: Yikes, degradation is looking bad

Wed Apr 25, 2018 6:35 am

tuningin wrote:At 3000 miles, according to LeafSpy I’ve already lost 2.7%.


Don't Panic!


At least not yet. I've seen 3% variation according to Leafspy in a single drive. Different types of driving/charging in different conditions will increase the estimate, and other types of driving/charging will decrease the estimate. Need more than a single point to try to understand what is happening...

Please keep a graph, or continue to post at regular intervals so we can understand what is happening.
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

NavyCuda
Posts: 136
Joined: Wed Jun 24, 2015 9:14 pm
Delivery Date: 24 Jun 2015
Leaf Number: 329051

Re: Yikes, degradation is looking bad

Sun Apr 29, 2018 11:48 pm

I charge to 100% every night with my ‘15. No indicated degradation and effective range was better than new until I put new tires on. 96,000km. 12 bars. Owned since new.

I’m hoping to get the same results when my ‘18 shows up.

petrikii
Posts: 1
Joined: Sat Mar 03, 2018 5:40 am
Delivery Date: 03 Mar 2018

Re: Yikes, degradation is looking bad

Sat May 05, 2018 11:33 pm

I have driven my Leaf 2018 now for 5000km and I haven't seen any fluctuation in SOH, only going downwards. What I have seen is that it seems to drop more after DCFC. I usually use AC charge at home and SOH usually drops about 0.01% if at all. One day I had to do DCFC twice and SOH dropped 0.26% in one day!

Now after 5000km 11 DCFC and 71 AC charges I am at 98.57%. It feels the drop might be accelerating now that it is getting warmer and no more sub zero temps in Finland. Just two weeks ago I was at 99.40% SOH.

powersurge
Posts: 1127
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: Yikes, degradation is looking bad (2018 Leaf)

Mon May 07, 2018 7:53 am

PETRIKLL, you cannot be measuring the car with Leafspy so much and be worried about "DEGREDATION". Your car is only 3 months old, and the battery has not even begun to break in... A couple of % points is nothing..

Do us all a favor. Put away your Leafspy, and drive the car... Do a Leafspy every 6-12 months to keep an eye on the battery.

If in 6 months, your battery is at 90% SOH, then you can involve Nissan with a problem...

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