Muaadh

I am using PVsyst 7.2 and 7.1 As the fact that the Li-ion battery has a life cycle of more than a lead-acid battery I have designed the stand-alone system with a Li-Ion battery (Pylontech_US2000B ) at 80% DOD and at 50% DOD but in both cases, the lifetime of the battery is 5 years. Furthermore if used a Lead-acid battery i got results around 12 years. How this problem can be solved?