SOH Drops from 100% to 96% in First 30 Days / 400 Miles?

I'm a little concerned that the SOH is dropping unusually fast, and the Hx value is climbing too rapidly, on my 2015 LEAF S. Here is some data:

12/28/2014 @ 92 mi and 1QC + 3 L1/L2:
SOH: 100%
Hx: 97.45%

01/25/2015 @ 462 mi and 1QC + 18 L1/L2:
SOH: 96%
Hx: 92.59%

Do these changes seem about right?

The weather here has been cool, but certainly not extreme: lows around 30-40 F and highs around 50-60 F. I have been using the heater occasionally, but I'm still easily getting 80 miles per 100% charge. I typically leave the car charging on L-1 at work during the day. I have left the car connected to L-2 charging overnight twice, I think, but know that the charging system/car are smart, and this shouldn't be a problem. (This was done at the Nissan dealer, so I think it's safe to assume that their chargers are working properly.)

MartinChico said:

I'm a little concerned that the SOH is dropping unusually fast, and the Hx value is climbing too rapidly, on my 2015 LEAF S. Here is some data:

12/28/2014 @ 92 mi and 1QC + 3 L1/L2:
SOH: 100%
Hx: 97.45%

01/25/2015 @ 462 mi and 1QC + 18 L1/L2:
SOH: 96%
Hx: 92.59%

Do these changes seem about right?

The weather here has been cool, but certainly not extreme: lows around 30-40 F and highs around 50-60 F. I have been using the heater occasionally, but I'm still easily getting 80 miles per 100% charge. I typically leave the car charging on L-1 at work during the day. I have left the car connected to L-2 charging overnight twice, I think, but know that the charging system/car are smart, and this shouldn't be a problem. (This was done at the Nissan dealer, so I think it's safe to assume that their chargers are working properly.)

Click to expand...

I posted a reply in the other thread as well. I have a 2015 S and have had very similar readings to you. I didn't get a reader until about 1000 miles, so I have no idea if I ever read 100% SOH on my car. The first reading I took had it at 97%, and my max gids was 292 until about 1500 miles. Most recently I am getting anywhere from 276-279 and I have 6100 miles on the car. Currently my SOH is at 89%, HX 90.5% and Ahr 58.77 and 61.3 average temp.

I will add a bit more anecdotal things I've noticed. If you don't frequently charge to 100%, your 100% readings will be much lower. There is some rebalancing of cells that occurs at the top end of the charge. If I charge up to 100% four days in a row and then take a reading, it bumps up by 3-4 Gids. Right now I'm trying to make a practice of keeping the charge between 30-90%, which is proving challenging since my wife has free chargers and work and the charge timer is so cumbersome on the S that its hard to guesstimate. From prior Leafs, it seems like prolonged time at 100% charge will hurt the battery, but on the 2015, there are people with 6000+ miles and still 292 Gids, and many of them charge all of the time with frequent QC. I still get 100 miles per charge and with the way I drive it, (4.7mi per kwh), my guessometer is still telling me 100+ in the morning with a full charge. Today it was at 104 miles of range?