Once used I would recharge for next use, let the BMS handle the rest. Most batteries dont like to be charge all the way down, although Bluetti h wont let that happen as a certain amount is protected within the BMS system. Just enjoy your AC200
That is what I do now. I often made a few coffees and it only used about 6% of charge, I immediately charged it up to 100% again. I wonder if each charge, however small, counts into the maximum times of charge.