Hydrogen Electrolyzer & Fuel Cell Manufacturing worked example

End-of-Line Test Utilization at 35% stack docking, leak verify, and undocking allowance: a worked example

What does the result look like when stack docking, leak verify, and undocking allowance reaches 35%? The full calculation is worked below with real intermediate numbers. Use it when a test engineer is checking whether the EOL bench can handle the next month of stack builds without adding a second cell, and wants to see hours per stack with realistic changeover.

The inputs for this scenario

  • Polarization-curve test points per stack: 24 points (unchanged)
  • Bench sweep rate: 1 points / min (unchanged)
  • Stack docking, leak verify, and undocking allowance: 35 % (raised for this scenario; the documented default is 30)

Working through the calculation

  • Applying the documented formula (Base end-of-line test time = test points รท sweep rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 32.4 hr for required end-of-line test time per stack, the number this scenario is built around.
  • At this operating point the engine returns 24 hr for base end-of-line test time per stack.
  • At this operating point the engine returns 35 % for stack docking and leak-verify allowance.
  • At this operating point the engine returns 1 pieces / min for bench sweep rate.

How this compares with the baseline

  • Against the tool's baseline example, where stack docking, leak verify, and undocking allowance sits at 30% and the headline result is 31.2 hr, this scenario comes in 3.85% above the baseline at 32.4 hr.
  • A figure at this level is achievable when stack docking, leak verify, and undocking allowance is genuinely sustained, not just peaked for a shift. It models the polarization sweep as a steady points-per-minute rate; settle-and-dwell sweeps where each operating point needs a stabilization hold will run longer than a flat rate predicts.

Results at a glance

  • Required end-of-line test time per stack: 32.4 hr (headline result)
  • Base end-of-line test time per stack: 24 hr
  • Stack docking and leak-verify allowance: 35 %
  • Bench sweep rate: 1 pieces / min

Run it with your numbers

  • Every input above is editable in the live End-of-Line Test Utilization calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.