Degradation Based on Years

Asset Degradation — Degradation by Years

Degradation by Years lets you define exactly how the asset's capacity, power, and efficiency declines on a year-by-year basis — exactly as a manufacturer warranty sheet specifies it.

Input Data

Your table needs one row per operational year (starting at year 0) with these five columns:

The downloaded sample template pre-fills asset capacity, power rating, and round trip efficiency with the starting values from your technical form.

All rows must be filled — interpolate or extrapolate from your warranty data if a year is missing.

Effective Full Cycles must be monotonically increasing (each year ≥ the previous year).

Once filled, click the Eye icon on the upload field to validate your data before proceeding. After upload, click Visualise to view the full degradation profile as a chart.

Worked Example

The table below is from a manufacturer warranty sheet for a LFP BESS, rated at 21.05 MWh / 10 MW initially, with 700 nominal equivalent full cycles per year:

How the Platform Uses This Data

Cycles Per Day

The platform derives the average daily cycle rate from the incremental change in cumulative EFC across all years:

$\text{Cycles per day} = \frac{\sum_{i=1}^{n}(C_i - C_{i-1})}{n \times 365}$

Using the example above — each year adds exactly 700 EFC (700 − 0, 1400 − 700, … ) across all 10 years:

$\text{Cycles per day} = \frac{700 \times 10}{10 \times 365} = \frac{7000}{3650} \approx 1.92 \text{ cycles/day}$

This derived value overrides the max cycles per day entered in the technical form — the uploaded file is treated as the source of truth.

SoH at End of Life

State of Health at end of life is calculated from the final year's capacity relative to year 0:

$\text{SoH}_{\text{EoL}} = \frac{C_n}{C_0} \times 100$

Using the example:

$\text{SoH}_{\text{EoL}} = \frac{14.86}{21.05} \times 100 \approx 70.6$

This value is automatically populated in the SoH field — no manual entry needed.

Visualising the Profile

Click Visualise to open the Degradation Over Time chart — a stepped graph plotted across calendar years for the full project lifetime.

• Left Y-axis — Energy capacity (MWh)
• Right Y-axis — Power rating (MW)
• X-axis — Calendar year from project start to end

Both Energy and Power are plotted as step lines, each holding flat within a year and dropping at the year boundary.

DoD Based vs. Degradation by Years