I just got back from my dealer and my battery check and a few other items. Just about 92 freeway miles each way.
I had been hoping to also use it as a check on my actual degradation against ABRP but for whatever reason it did not match up very well this time.
As to the dealer visit -> Battery check said "Very high and good" for both of the two scores, as well as full health bars. They rotated my tires. The ordered a bracket under warranty to adjust my bumper. I complained about Fast Charge speeds (Rapid gate) just as I did last time and asked for a software BMS update, and they said there were no BMS codes present and blamed the fact it charged slower on "my aftermarket OBD2 dongle" somehow interfering with DC Fast charge speeds - and they completely ignored the fact the battery was hot. So I'll have to complain again next visit but remember to remove the dongle. The whole experience took 4.5 hours. My appointment was at 8:45 and when I gave him the keys he said it would take all day. I told him we were waiting and he said there were twenty others in front of us first, but he would go as fast as he could. I think this falls under a Seinfeld example of they know how to take an appointment but not keep an appointment. (I think it was reservation but close enough example). The only good side of this whole thing was my bill, $20. They did not charge for the battery test. Still, this particular Nissan dealer I cannot recommend.
As to the battery degradation and my drive, maybe some interesting data there?
So this AM I had my car ready for the drive, charged up to 100% on the dash. LeafSpy had me at 99.1% and 403.70 V. SOH 89.85%, Ahr 103.72, Hx 108.82, and battery Temp at 92.2 F max. Arrived at the dealer with the Dash saying 19% and LeafSpy readings of 29.5% with Temp at 104.7 F max. Car said I averaged 3.5 miles / kWhr, which seems decent at 70 mphr. Charged for 37 minutes at a Honda dealer next door for a total of 15.97 kWh before my appointment. My starting rate was 27 kW, so way below 50, and it was around 20 kW when I unplugged. I unplugged with a LeafSpy reading of 72.5% and battery temp max of 120.5 F. Practically 5 hours later after Nissan farted around.... temps were at 115.3 F max. Charged some more while getting a late lunch for 20 minutes and added 7.51 kWh. LeafSpy after that charge was at 87.9% with temps at 118.9 F max. Drove home part way and tested an EA charger for 10 minutes. Did not check LeafSpy after that but I know EA says I charged 3.93 kWh and I noted the car would only take 19 kW. Got home and my final trip LeafSpy readings were 32.1% with an AHr of 103.71, SOH of 89.84%, 345.23V, Hx of 108.64%, and Temp of 123.3 F max.
So I'm curious if anyone has anything this data means to them? It did not really match ABRP either direction so degradation is difficult to access. I'm going back through my phone to find the data from my trip 6 months ago, but I recall arriving at thee dealer with LOWER SOC by about 5% (14% on dash versus 19% this time), so that one piece of data is opposite expected, and maybe does not tell me much about degradation. Who knows what was different. HX appears to actually have dropped during the day.
Two things I do know from today is that the battery was hot and kept getting hotter. And my Nissan has lousy service.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19