This what Bluetti said in the Indiegogo comments:
" if you slow charge the AC200 (at 400W) every day, disconnect charging, run it down to 0% capacity, then charge it again the next day. This will equal roughly 2500 cycles, but the system will only have 50% of it’s storage ability. This will be 1200-1400 cycles to reduce to just 80% of the storage capacity. "
You are free to view the indiegogo comments for yourself. You don't need to create an account. It's public. I understand what they are saying.