Way too early to tell and so far, you aren't really that close to what others have experienced. There is one guy who dropped to 89% in a few months but also suspects he never was more than 96-97% when new.rikus11 wrote:New owner of a 2017 S Leaf up here in Chicago area. Little concerned at a recent drop off in Ahr and SOH. I know it is really early but it seems to have happened really recently which makes me nervous about what is to come. Wondering if I am a victim of the dreaded "sat on the dealer lot all summer at 100%" phenomenon. It certainly isn't Phoenix hot but I am not sure at what point is too hot to sit at 100%.
Build date is 3/17. Purchased new 9/12/17 with 30 mi on odometer.
First leaf spy on 9/17
9/17/17 375 odo Ahr 80.513 SOH 100% Hx 96.15 2QC (done by dealer) 13L1/L2
9/21/17 745 odo Ahr 81.340 SOH 100% Hx 97.26 2QC 21 L1/L2
9/26/17 1205 odo Ahr 81.960 SOH 100% Hx 97.97 2QC 36 L1/L2
10/06/17 2132 odo Ahr 79.353 SOH 99% Hx 95.02 3QC 58 L1/L2
10/13/17 2684 odo Ahr 78.113 SOH 98% Hx 93.41 3QC 71 L1/L2
10/17/18 3026 odo Ahr 77.644 SOH 97% Hx 92.71 3QC 78 L1/L2
It all seemed to start to fall after the quick charge I did between 9/26 and 10/6. It was just a hook up to make sure I could access the network in case I need to use them in a emergency in the future. Charged from 44% to 80% in 15 min and then stopped the charging.
Common charging practices are L1 charging overnight most nights. I have L2 charging at work so I will usually charge a couple of hours during the day right before heading home from work. Usually at least once a week arrive at work with 20-40% charge and then charge to 100% on the L2. I time it so that it is done charging close to the time I leave for the day. Charged to 100% several times with the L1 at home. usually on the weekend since it will have more time to sit on the charger. I try to keep it between 20-95% as much as I can. If I remember correctly the battery temp got to around 93F during the quick charge and I think that is the hottest I have seen so far.
I will update since I know I am really early just a little concerned that the SOH and Ahr are starting to drop fairly dramatically in the first few thousand miles.
As you saw, charging/driving habits will bounce your numbers around so anything +/- 3 is realistically meaningless. check my blog. I purposely manipulated my numbers several times just because.
You have LEAF Spy, start a log track your numbers every day. Now tracking every day does not mean analyze every day. I would analyze no more often than once a month. Sounds like a lot of work but it takes me all of 30 seconds every morning to launch LEAF Spy, take the readings and reset my trip Odo for the day. As far as charting you can log what you want. On mine I have
mileage (reset daily)
miles per kwh (reset daily)
Kwh available (on full charges only)
SOH (when it drops from 100, I will start tracking it...)
Public charging kwh received
Public charging cost.
home electric rates (calculated once a month when the new bill arrives)
From this I can calculate cost per mile, NCTC benefits, etc.
But back to your car. What I see is likely numbers depressed for a few possible reasons.
Charging habits. Stopping before full charge is not needed if your daily commute drops you below 80% SOC. Not charging fully daily limits the amount of top end balancing on the pack WHICH IS NOT A BAD THING but will depress your LEAF Spy Stats. It can take as much as 4-5 consecutive days for your numbers to rise. Those numbers are likely a more realistic picture of your pack status.
The other thing is charging to full at work during the day "could be" a bad idea especially if its hot, unshaded and finished several hours before leaving. I know its hard to pass up free but it really needs to be closely managed.
Finally, the wild card and that is time on the lot. I have had great success (its not luck) with battery pack longevity due to all 3 LEAFs of mine having minimal time on the lot and what little time was during Winter. I have to find it hard to believe it does not make a difference.