Renewable Energy, Solar & Wind Manufacturing worked example

Cell Breakage Cost at 2.07% wafer and cell breakage rate: a worked example

Push wafer and cell breakage rate up to 2.07% and the picture changes. This example computes every intermediate figure at that operating point. A line engineer uses it to quantify what a rising microcrack rate is costing per shift on a high-throughput stringer.

The inputs for this scenario

  • Cells processed per run: 120,000 cells (unchanged)
  • Loaded cost per finished cell: 0.62 $/cell (unchanged)
  • Wafer/cell breakage rate: 2.07 % (raised for this scenario; the documented default is 1.8)
  • Line stoppage charge per event: 800 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Total loss = cells processed x cost/cell x breakage rate% + stoppage charge) to the inputs above produces each figure below.
  • At this operating point the engine returns 2,340 $ for total cell breakage cost, the number this scenario is built around.
  • At this operating point the engine returns 0.02 $ / piece for cell breakage cost per unit.
  • At this operating point the engine returns 1,540 $ for variable cell breakage cost.
  • At this operating point the engine returns 800 $ for fixed cell breakage cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where wafer and cell breakage rate sits at 1.8% and the headline result is 2,139 $, this scenario comes in 9.39% above the baseline at 2,340 $.
  • It computes the total dollar loss from cell breakage over a run (variable scrap cost plus fixed stoppage charge) and the resulting cost per cell processed. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Total cell breakage cost: 2,340 $ (headline result)
  • Cell breakage cost per unit: 0.02 $ / piece
  • Variable cell breakage cost: 1,540 $
  • Fixed cell breakage cost adder: 800 $

Run it with your numbers

  • Every input above is editable in the live Cell Breakage Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.