To quote Mwalsh
Main factors (in order of importance) when it comes to 2011/2012 LEAF battery degradation – HEAT (the big one); time; cycling.
Heat isn't an issue in the UK
Time has been less for the 2013
cycling was less important so the miles while nice aren't important to me
Personally I'm only worried about heat and time. Show me a 2011 or 2012 that lost multiple bars in cold climate.
and/or
Show me a 2013 that didn't lose bars in a hot climate.
either of those would change my opinion some, multiples of those would change it even more.
as a reminder the 4 bar losers in the wiki are
AZ x11 (out to 45 months)
CA x9 (out to 48 months)
TX x3 (out to 42 months)
FL
unknown
WA
and the 3 bar losers are
AZ x21 (out to 28 months)
TX x5 (out to 40 months)
CA x5 (out to 36 months)
FL x3 (out to 30 months)
It'll be AZ that I'm watching most for 2013 battery improvement with TX and FL of interest.
we are 29 months in on the 2013 car made in Jan but only 18 months in on a 2013 made in Dec. It'll take some time to get to the point were they've all seen two summers.
19,493 2011 + 2012 Leafs sold in US
22,610 2013 Leafs sold in US
30,200 2014 leafs sold in US
I guess the next question is how close to that distribution is the mynissanleaf membership? We specifically need data from 2013s now as we have tons of data on 2011/2012 and there isn't much data yet on bar losses from 2013.
A. it may be that 2013 batteries do handle heat better
B. it may be that we just haven't gotten the data yet to show no change.
C. it may be the people most likely to notice loss avoided buying 2013 Leafs
I'm not ready to call it or rule out any possibility.