cwerdna
Posts: 8282
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Battery Milestone- 60k and 12 bars

Sat Nov 03, 2018 5:40 pm

mtndrvr wrote:Where would I look to see that quantified?
The variation in batteries in my and similar climates would need to be explained to accept that as the only explanation. It is clear that hot areas have had more capacity loss but am unaware of the data on the whole.

Stanton wrote:With these battery packs its all about the temperature they live in...which is why you should include location in your profile.
From subsequent posts, it seems as though you live in a "cool" climate...so that explains that.

Agreed with Stanton.

The problem is that there have been many different revisions of batteries besides climates. The ones in Leafs built 4/2013 thru model year '14 seem better than ones that came before. Leftie calls those "wolf pack". Lizard pack in model year '15 and presumably '16 S seems best. We don't really know for anything beyond that.

Nissan's been unwilling to release any degradation data.

viewtopic.php?p=537951#p537951 has some pointers to some examples of contrasts by climate. There have been '13s which were still at 12 bars at 90K miles in the mild Pacific NW in May 2017. This would be impossible in my area.

My 5/2013 built '13 lost its 1st bar in Nov 2017 at just shy of 50K miles. I still have 11 bars and am now past 60K miles. SOH is around 83.xx%. Yet a guy in Phoenix w/a '13 with the same build month as mine lost his FOURTH bar by Oct 2016. From viewtopic.php?p=473995#p473995:
elec7ric wrote:I got my new 2013 SL (manufactured 5/2013 ) on 9/30/2013. Lost my first bar 5/2015, second bar 9/2015, third bar 5/2016 and forth bar 8/23/2016 (31,400 miles). First 21 months mostly charged L1/L2 to 80% (home and work). My drive was 55 miles round trip with about 75% highway. As capacity started to go away, I had to charge more often to 100%, however, I tried my best to keep it fully charged as little as possible (extreme Phoenix temperatures).

And, within the SF Bay Area (I'm in a hotter part of it), there's considerable difference in temps: viewtopic.php?p=533224#p533224.

On 1 summer day, Pacifica hit a high of 55 F while Walnut Creek (38 miles away by car) hit 95 F. These huge contrasts aren't unusual in the summer in the Bay Area. But yeah, places that don't get hot like city of SF, Pacifica and Half Moon Bay would be great for Leaf battery longevity.

'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.

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Stanton
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Joined: Thu Feb 03, 2011 10:56 am
Delivery Date: 01 Sep 2011
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Re: Battery Milestone- 60k and 12 bars

Sun Nov 04, 2018 8:05 am

jjeff wrote:
Stanton wrote:With these battery packs its all about the temperature they live in...which is why you should include location in your profile.
From subsequent posts, it seems as though you live in a "cool" climate...so that explains that.

While my location can no debatably be described as "cold" many months of the year, we also get many(and recently are getting many more) "hot" days in the summer, in the 90s.


Some perspective...and anecdotal data.
Temps in the 90's are a "cool" day here in North Texas; it gets into the 80's at night...but my battery pack temps never register below 90 from about June thru September.
In another month, I'll hit 3 years on my (replacement) lizard battery pack...and still be down only 1 bar (my Ahr reading hasn't budged for months, which itself has been a bit surprising). The original battery pack was already down 2 bars at this point with falling Ahr readings. Over all, I'd have to say the lizard pack has definitely out-performed the original pack to this point.
2011 Blue Ocean SV w/floor mats & window tint
12v LiFePO4 battery & FIAMM 74100 horns
Wet Okole seat covers (front)
Tor's low-power heater mod
2013 sun visor
3G modem upgrade
L2 EVSE Upgrade
Battery Pack replaced (Rev E) @51 months and 41k miles

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