You guys are worrying too much. I charge my Raven S to 90% routinely . At 38000 miles it’s down 13 miles from new. I live in a hot climate that is supposed to be harder on lithium ion batteries. Frankly, based on trips I make routinely, I’m not sure it’s lost even that much.
What is your ambient temperature? What is the actual battery capacity? There are a few treads discussing range estimation and after reading them I decided to use actual capacity as baseline (although it still uses the range estimator). I use SOC rather than miles in my IC anyway.
I have 2020 Raven SLR+ and never charged more than 90%. On a few occasions I used SC and on a few occasions I went down below 20% (still never single digit).
Most common use case is going down to ~50% during the daily drive and then L2 (32A) charge overnight to 60%. Essentially, daily 10kWh top up.
One of garages is warm - regularly 28-29’C. I noticed more overnight power loss in it and I attribute it to the BMS cooling the battery but it may be faster discharge due to higher pack temperature. It is not much - less than one kWh per 24hrs - but noticeably more than the other, cooler place.
Depending on when I measure it, the battery is between 95kWh and 98kWh. Interestingly, it is closer to 95kWh at the extremes - around 25% and 90%. That would be between 2% and 5% degradation for 2yrs/34k miles - assuming the usable part of the battery is 100kWh and the rest is reserve.
I also did some research about the optimum L2 charging current. While true that 48A is nothing compared to SC, it still likely turn the BMS cooling on. On the other hand, trickle charge will keep the car awake for longer. That has an effect on the range calibration (the car must be asleep for a few hours for this to kick in) and may have negative effect on the flash. Even though Ravens have upgraded flash, it still has a limit and appears that the car writes to it while awake. I found that 24A - 32A is the happy optimum where I get the fastest charge without BMS kicking it. It is definitely ambient temperature dependent.
It also seems that the range estimator needs the car to be asleep at different SOC levels in order to improve accuracy. Given my practice, my estimator may be off; hence the difference in capacity numbers between different SOC.
In the past few months, starting probably with 2022.4, I noticed that the charger “overshoots” quite often at the higher SOC. When I ask for 90% and start from 30%-40% it will stop charging at 91%-92% instead of 90%.
I know that I may be “pixel peeping” but I am interested in this as a physics/engineering problem. Completely aware that in the grand scheme of things the difference may be negligible. Many people will drive according to their habits and would not care.