I Believe Bluetti reserves the bottom 10% for battery safety. So even if you run to 0%, it’s not actually dead, there’s still 10% left. You just can’t access that. As to going to 100%, personal choice. I’m not worrying about it with my units. They’ll die from age well before cycle count.
Also, thanks for posting the usage results. Surprised by the A/C. I thought it would last longer as the A/C wouldn’t run full time on those modes. I haven’t gotten around to testing my AC200P with our window unit yet. Now I have something to compare results to when I do.