EV Charging Infrastructure Manufacturing worked example

Field Failure Cost at 1.58% expected field failure share: a worked example in ev charging infrastructure manufacturing

This worked example runs the field failure cost numbers for a tougher week than the baseline: 1.58% expected field failure share instead of the typical 2.2%. Estimate total field failure cost for installed EV chargers from affected units, service cost, failure share, and fixed recovery adders.

The inputs for this scenario

  • Fielded chargers or ports in scope: 5,200 units (held at the documented default)
  • Cost per field failure event: 310 $ / event (held at the documented default)
  • Expected field failure share: 1.58 % (the input this scenario stresses; the baseline uses 2.2)
  • Fixed recovery or campaign adders: 18,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Expected field failure cost = fielded population × cost per failure event × expected failure share.
  • Total EV charger field failure cost works out to 43,470 $ at these inputs, and this is the headline figure for the scenario.
  • Field failure reserve per charger/port works out to 8.36 $ / unit at these inputs.
  • Expected field failure event cost works out to 25,470 $ at these inputs.
  • Recovery or campaign adders works out to 18,000 $ at these inputs.

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 18.69% below the baseline at 43,470 $.
  • Use it to set warranty accruals, scope the cost of a field campaign or recall, or stress-test the financial impact of a reliability issue across the installed base. 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

  • Total EV charger field failure cost: 43,470 $ (headline result)
  • Field failure reserve per charger/port: 8.36 $ / unit
  • Expected field failure event cost: 25,470 $
  • Recovery or campaign adders: 18,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Field Failure Cost calculator, set expected field failure share to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.