BESS Ageing vs Duty Cycle
https://www.batterydesign.net/bess-ageing-vs-duty-cycle/ takes a look at the paper: Xu J, Li H, Hua S and Wang H (2025) Experimental investigation of grid storage modes effect on aging of LiFePO4 battery modules. Front. Energy Res. 13:1528691
and how it compares to what we see in the field:
- We see this in the field constantly. Same capacity, wildly different degradation across assets running different grid services. Now there’s a clean paper that confirms it.
- A team from a battery test equipment manufacturer ran 16 months of cycling tests on 220Ah LFP modules using actual peak shaving and frequency regulation profiles from a storage power station.
- Peak shaving degrades 1.8x faster than frequency regulation. Same SOC range, same temperature. Shallow SOC windows (30–80%) age 1.65x slower than deep cycling.
- Most fleet operators still model degradation as a function of cycle count, not service mix. If you’re stacking revenue without modeling what each service does to your asset, you’re optimizing income and ignoring cost.
u/modelmakereditor — 22 hours ago
