[He Keith]

Volvo recommends 90% and that is what I do. I do not charge it every day. 2-3 times a week max. usually Friday night so it is ready for the weekend then Sunday or Monday night to get through the week. If I can keep my car in my possession long enough I suspect 3x a week. I am fine letting battery get below 50% and then let that trigger a mid-week charge. My goal is to get comfortable running battery from 90 done to 30%-40% range before charging.

If I were leasing I might go to 100%, but even with home charging once you get above 80% the charge rate slows down.

Also I plan on keeping the car for a long time so trying to minimize the charge cycle and there is interesting data in this video regarding how you charge and discharge your battery and its impact on degradation.

Video covers more than just Tesla and degradation and charge cycles is around the 15:00 mark.