BESS Engineering

BESS Cycle Stress & Degradation Rate

Model degradation from DoD cycling, C-rate stress, and calendar aging. Find the optimal DoD window for your chemistry.

Presets

Battery Parameters

Cell Chemistry

Nominal Capacity

kWh

Rated energy capacity at new condition (100% SOH)

C-Rate (Charge/Discharge) High C-rate increases thermal + electrochemical stress multiplier

Depth of Discharge (DoD)

80 %

DoD correction: N_eq = cycles × (80%/DoD)^1.5

Operating Temperature

25 °C

Arrhenius temperature correction applied to calendar aging rate

Annual Full Equivalent Cycles Number of full cycles per year (adjusted for DoD)

Project Life

years

Typical BESS project life: 10–25 years

End-of-Life Threshold

80 %

SOH threshold defining end of useful life (industry standard: 80%)

Optimal DoD Window

Window Lower Bound

20 %

Window Upper Bound

80 %

Set a narrow operating window (e.g. 20–80%) to reduce stress. Capacity available: high_pct − low_pct = window_pct%

Cycle Revenue (optional)

$ $/MWh

Revenue per MWh delivered per cycle — enables revenue degradation analysis

Enter battery parameters or select a preset to model cycle stress and degradation rate.