Hi!
After 1723km and 4 weeks of ownership I almost down to 99% according SOH. The daily 0.01-0.02% drop continues every day no matter if I charge to 100% and leave it so for hours (or half a day) or keep it around 80%, whether I only do L2 or I do Chademo. I start to think, that the SOH value in LeafSpy does not have anything to do with real SOH. The AHr is dropping also continuously the Hx is keeping rising. Current values are:
AHr: 114.38
SOH: 99.08%
Hx: 106.64%
Cell delta when charged to 100%: 9mV
I don't know what AHr means, I guess Ampere hours, If yes, it cannot be true. If you multiply it with the Pack average voltage like 370V you get over 42kWh, which is more than the calculated 39.6kWh max capacity. (if multiplying with 400V you get even higher)
The only thing what gives some idea about degradation are the GIDs. I still can charge the car to 498GIDs, and if I assume (from LeafSpy) that 500 is the max for 40kWh pack, it is 99.6%, and it is quite steady, since I got the car it was always like this. I once managed to charge to 501 GIDs, but I think that was only a mistake reading.
Although I don't know if the above values are read directly from the CAN bus messages or are calculated based on some values, but I think the 2018's Leaf BMS is sending the data totally different way to CAN bus, and values cannot be used the same way like with older Leafs.
Regards
kovadam