DougWantsALeaf
Posts: 1005
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Battery Degradation Comparison Chevy Bolt EV and Nissan Leaf

Wed Oct 02, 2019 11:08 am

I agree that its best to compare the Plus to the Bolt as your usage cycle (miles between charge) will be more consistent. In Jan/Feb we can start to get the 1 year view on those packs.

Does the Bolt give you access to the actual SOH or true remaining kilowatts?

My one concern with some of the Tesla degradation reports (with exception of those rares cases of fast degeneration - see tesloop), is that to base it purely on miles on the GOM doesn't account for driving style impacts (most Ev drivers get more efficient as they learn to drive an EV), and any behind the scenes algorithm changes. A Tesla (or Bolt, or Leaf) on miles of range basis could show 0 degradation after 5 years, though still have battery loss.

Even in my 2013 Leaf with 11 bars, my average 100% range was 81 miles. Thats only 4% loss from the EPA 84 miles when I bought the car. Truth was more like 20% or so.
2019 SV Plus Silver
2013 Leaf SV
100 Mile Club Member (Number 87)
Max distance on 13 Leaf: 120 miles
Max distance on 19 Leaf: 242 Highway 4.5 miles/kWh (4.9 KWh remaining)

amissionleaf
Posts: 20
Joined: Mon Oct 08, 2018 1:53 pm
Delivery Date: 23 Mar 2017
Leaf Number: 302367

Re: Battery Degradation Comparison Chevy Bolt EV and Nissan Leaf

Wed Oct 02, 2019 11:55 am

my 2014 leaf's pack show 82 epa miles at its last service check at around 31000 miles, I didn't feel a lot range loss, but I didn't have leafspy with it.

my 9 month old model 3 shows about 4~5% range loss already. my friend's 10-month model 3 shows 3~4% capacity loss, though he drives less than me.
2014 S; 33500 miles, returned with 12 bars.
2017 SV; 20000+ miles, sw update 10/8/18, feels like 15 miles range back,.
date miles SOH
10/19/2018 20853 91.50%
10/19/2019 27176 85.26%

powersurge
Posts: 1500
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: Battery Degradation Comparison Chevy Bolt EV and Nissan Leaf

Wed Oct 02, 2019 12:05 pm

amissionleaf wrote:
Wed Oct 02, 2019 11:55 am
my 2014 leaf's pack show 82 epa miles at its last service check at around 31000 miles, I didn't feel a lot range loss, but I didn't have leafspy with it.

my 9 month old model 3 shows about 4~5% range loss already. my friend's 10-month model 3 shows 3~4% capacity loss, though he drives less than me.
You cannot get a Leafspy reading and say that there is 4% "loss"... The actual distance between 100% and 96% is minuscule as it is impossible to measure % that accurately at the top end of the scale...

Also, you cannot estimate that you will be losing % points in a linear fashion.

amissionleaf
Posts: 20
Joined: Mon Oct 08, 2018 1:53 pm
Delivery Date: 23 Mar 2017
Leaf Number: 302367

Re: Battery Degradation Comparison Chevy Bolt EV and Nissan Leaf

Wed Oct 02, 2019 1:56 pm

powersurge wrote:
Wed Oct 02, 2019 12:05 pm
amissionleaf wrote:
Wed Oct 02, 2019 11:55 am
my 2014 leaf's pack show 82 epa miles at its last service check at around 31000 miles, I didn't feel a lot range loss, but I didn't have leafspy with it.

my 9 month old model 3 shows about 4~5% range loss already. my friend's 10-month model 3 shows 3~4% capacity loss, though he drives less than me.
You cannot get a Leafspy reading and say that there is 4% "loss"... The actual distance between 100% and 96% is minuscule as it is impossible to measure % that accurately at the top end of the scale...

Also, you cannot estimate that you will be losing % points in a linear fashion.
You are right for model 3 I have no accurate means but read the displayed range with full charge against day 1 full range to estimate the capacity loss. it showed only 2% loss in April with a full charge, and recently 4.5% loss.
2014 S; 33500 miles, returned with 12 bars.
2017 SV; 20000+ miles, sw update 10/8/18, feels like 15 miles range back,.
date miles SOH
10/19/2018 20853 91.50%
10/19/2019 27176 85.26%

LeftieBiker
Moderator
Posts: 13263
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Battery Degradation Comparison Chevy Bolt EV and Nissan Leaf

Wed Oct 02, 2019 2:30 pm

my 2014 leaf's pack show 82 epa miles at its last service check at around 31000 miles,

Do you mean "estimated 82 miles"? What you wrote doesn't make sense. The range estimator can't be used to gauge actual range unless you drive exactly the same route every time, and the weather doesn't change.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

amissionleaf
Posts: 20
Joined: Mon Oct 08, 2018 1:53 pm
Delivery Date: 23 Mar 2017
Leaf Number: 302367

Re: Battery Degradation Comparison Chevy Bolt EV and Nissan Leaf

Wed Oct 02, 2019 2:36 pm

LeftieBiker wrote:
Wed Oct 02, 2019 2:30 pm
my 2014 leaf's pack show 82 epa miles at its last service check at around 31000 miles,

Do you mean "estimated 82 miles"? What you wrote doesn't make sense. The range estimator can't be used to gauge actual range unless you drive exactly the same route every time, and the weather doesn't change.
that's not my estimate but the dealer scanned the battery and gave me the official report at the last service 3 months before the end of lease
2014 S; 33500 miles, returned with 12 bars.
2017 SV; 20000+ miles, sw update 10/8/18, feels like 15 miles range back,.
date miles SOH
10/19/2018 20853 91.50%
10/19/2019 27176 85.26%

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