Grid-Scale Battery Energy Storage Systems worked example

PCS Cabinet Yield at 99% target pcs cabinet yield rate: a worked example

What does the result look like when target pcs cabinet yield rate reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when the PCS cabinet factory acceptance test line needs a clean yield rate for the weekly quality review and you need to decide whether to escalate an inverter power stage or control board issue.

The inputs for this scenario

  • PCS cabinets passing factory acceptance test: 47 cabinets (unchanged)
  • Total PCS cabinets entering factory acceptance test: 50 cabinets (unchanged)
  • Target PCS cabinet yield rate: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (PCS cabinet FAT yield rate = PCS cabinets passing FAT / total PCS cabinets entering FAT x 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 94 % for pcs cabinet fat first-pass yield rate, the number this scenario is built around.
  • At this operating point the engine returns 5 points for pcs cabinet yield gap to target.
  • At this operating point the engine returns 47 count for pcs cabinets passing factory acceptance test.
  • At this operating point the engine returns 50 count for total pcs cabinets entering factory acceptance test.

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 %.
  • A figure at this level is achievable when target pcs cabinet yield rate is genuinely sustained, not just peaked for a shift. It measures first-pass yield only and does not account for cabinets that pass after rework, so it can understate final shippable yield while still flagging process problems.

Results at a glance

  • PCS cabinet FAT first-pass yield rate: 94 % (headline result)
  • PCS cabinet yield gap to target: 5 points
  • PCS cabinets passing factory acceptance test: 47 count
  • Total PCS cabinets entering factory acceptance test: 50 count

Run it with your numbers

  • Every input above is editable in the live PCS Cabinet Yield calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.