EV Charging Infrastructure Manufacturing worked example

Field Failure Cost at 2.53% expected field failure share: a worked example in ev charging infrastructure manufacturing

Push expected field failure share up to 2.53% and the picture changes. This example computes every intermediate figure at that operating point. a service or reliability leader needs cost exposure from charger field failures

The inputs for this scenario

  • Fielded chargers or ports in scope: 5,200 units (unchanged)
  • Cost per field failure event: 310 $ / event (unchanged)
  • Expected field failure share: 2.53 % (raised for this scenario; the documented default is 2.2)
  • Fixed recovery or campaign adders: 18,000 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Expected field failure cost = fielded population × cost per failure event × expected failure share) to the inputs above produces each figure below.
  • At this operating point the engine returns 58,784 $ for total ev charger field failure cost, the number this scenario is built around.
  • At this operating point the engine returns 11.3 $ / unit for field failure reserve per charger/port.
  • At this operating point the engine returns 40,784 $ for expected field failure event cost.
  • At this operating point the engine returns 18,000 $ for recovery or campaign adders.

How this compares with the baseline

  • Against the tool's baseline example, where expected field failure share sits at 2.2% and the headline result is 53,464 $, this scenario comes in 9.95% above the baseline at 58,784 $.
  • It computes the expected field failure cost for a charger population — fielded units times per-event cost times expected failure share — plus fixed recovery or campaign adders, and the reserve per fielded unit. 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 EV charger field failure cost: 58,784 $ (headline result)
  • Field failure reserve per charger/port: 11.3 $ / unit
  • Expected field failure event cost: 40,784 $
  • Recovery or campaign adders: 18,000 $

Run it with your numbers

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

Last reviewed 2026-05-12.