Grid-Scale Battery Energy Storage Systems worked example

PCS Cabinet Yield at 68% target pcs cabinet yield rate: a worked example

This worked example runs the pcs cabinet yield numbers for a tougher week than the baseline: 68% target pcs cabinet yield rate instead of the typical 95%. Calculate power conversion system cabinet first-pass yield at factory acceptance test for grid-scale BESS production by comparing PCS cabinets passing all FAT checks against total cabinets tested and measuring the gap to the yield target.

The inputs for this scenario

  • PCS cabinets passing factory acceptance test: 47 cabinets (held at the documented default)
  • Total PCS cabinets entering factory acceptance test: 50 cabinets (held at the documented default)
  • Target PCS cabinet yield rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: PCS cabinet FAT yield rate = PCS cabinets passing FAT / total PCS cabinets entering FAT x 100.
  • PCS cabinet FAT first-pass yield rate works out to 94 % at these inputs, and this is the headline figure for the scenario.
  • PCS cabinet yield gap to target works out to -26 points at these inputs.
  • PCS cabinets passing factory acceptance test works out to 47 count at these inputs.
  • Total PCS cabinets entering factory acceptance test works out to 50 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target pcs cabinet yield rate sits at 95% and the headline result is 94 %, this scenario lands almost exactly on the baseline at 94 %.
  • Use it on the production floor to monitor build quality, set rework expectations, and decide whether yield is trending toward or away from target. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • PCS cabinet FAT first-pass yield rate: 94 % (headline result)
  • PCS cabinet yield gap to target: -26 points
  • PCS cabinets passing factory acceptance test: 47 count
  • Total PCS cabinets entering factory acceptance test: 50 count

Run it with your numbers

  • To rerun this with your own numbers, open the live PCS Cabinet Yield calculator, set target pcs cabinet yield rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.