mn4az wrote:johnlocke wrote:First bar drops at about 80% so around 40,000 mi. 4th bar drops around 65% so maybe 70,000 mi. 4-5 years into the warranty, Could I ask What you mean by babying the battery? Charging habits? I'd like to know what you tried. There is a bit of an argument over whether better charging habits can help preserve the battery or if it doesn't make any difference how you charge. You are one of the first people in the northern tier to report serious battery degradation.
Here's the list of things I have tried to do:
-Keep in a 25%-80% SOC.
-When above 80% SOC try to drive as soon as possible.
-On occasion when below <25% have charged just enough to get to 25% - 30%.
-During cold winter days (ie <30F for high temp) charge to 100% SOC but drive as quickly as possible upon charge completion
-When on vacation let car sit at 40-60% SOC
-Most charging done between 2a - 8a (not charging when battery is hot).
-Charging done on ClipperCreek LCS-25, 240V, 20A (slower than most)
-Always in ECO mode.
Car sits in an open parking lot for 7-8 hours/day while at work and a connected/covered garage when it's home and I bet that over 50% of the miles are at >55MPH.
We've been Leaf drivers since our leased '13 SV (mostly charged to 80%) and our other EV is a Tesla. After turning in the '13 with 45k miles and zero bar loss (didn't have LeafSpy at the time for measurements) we purchased the '16 SV (bought in April '16 - manufacturing date was Dec '15). I wanted a good 10 years out of it: 4 years of adults driving and 6 years of kid driving and I expected some degradation. Thus, I tried to "baby" the battery using the above methods. Now that I know it's not making a difference I am not going waste my time any more. Just going to charge it to 100% SOC during my off peak times and enjoy driving it knowing that a new battery is very likely in it's future.
One thing that charging to 100% will allow me to do is to collect more data points. My guess is I will start taking LeafSpy readings on monthly basis (ie first Saturday of the month).
One random point.... I know a guy that lives 7 miles from me with an '11 Leaf and similar driving patterns. His data shows about a 1% SOH drop every 2500 miles which is VERY similar to mine. Makes me wonder if driving patterns/habit/temperature is more important than how one charges the car.
I'm in Wayzata, MN and my 2016 30kwh Leaf lost it's 2nd bar a couple weeks ago.
October 2017 first bar lost:
Mfg date: 12/15
May 2018 2nd bar lost:
I stopped babying my battery as soon as I noticed the rapid degradation, despite my best efforts to preserve it. My neighbor has a 2013 Leaf with around 65k miles and still has all 12 bars (he doesn't baby his battery at all). He can't believe I've already lost 2 of my bars!