General rule of thumb most people say is to keep charge between 20-80% unless you need charge to 100% for further trips, etc. Same thing for current cell phones, etc. Supposedly helps with the degradation of the battery over time. Elon Musk recently said that with their new batteries, the Tesla can be charged to 100% without significant impact on degradation. I personally believe there are a lot of what if’s currently. There’s the classical theory of batteries based on physics and then the new theories with all the computer management of batteries. Most people I personally know with EV’s limit the daily ish charges to 80-90% with 100% reserved for when needed.