EV & Battery Manufacturing worked example

Battery Warranty Exposure at 2.07% expected battery warranty claim rate: a worked example

This scenario runs the battery warranty exposure calculation on the strong side: 2.07% expected battery warranty claim rate, with every other input held at its documented default. an EV program team needs a quick warranty reserve or campaign exposure estimate for battery packs in the field

The inputs for this scenario

  • Exposed packs or vehicles in field: 18,000 packs/vehicles (unchanged)
  • Average cost to settle one battery claim: 3,400 $ / claim (unchanged)
  • Expected battery warranty claim rate: 2.07 % (raised for this scenario; the documented default is 1.8)
  • Fixed recall campaign and support cost: 250,000 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable battery warranty cost = exposed population × claim cost × expected claim rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,516,840 $ for total battery warranty exposure, the number this scenario is built around.
  • At this operating point the engine returns 84.27 $ / exposed unit for warranty exposure per exposed unit.
  • At this operating point the engine returns 1,266,840 $ for variable battery warranty cost.
  • At this operating point the engine returns 250,000 $ for fixed campaign/support cost.

How this compares with the baseline

  • Against the tool's baseline example, where expected battery warranty claim rate sits at 1.8% and the headline result is 1,351,600 $, this scenario comes in 12.23% above the baseline at 1,516,840 $.
  • Use it when setting warranty reserves, scoping a field action, or deciding whether a known defect justifies a proactive replacement campaign. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Total battery warranty exposure: 1,516,840 $ (headline result)
  • Warranty exposure per exposed unit: 84.27 $ / exposed unit
  • Variable battery warranty cost: 1,266,840 $
  • Fixed campaign/support cost: 250,000 $

Run it with your numbers

  • Every input above is editable in the live Battery Warranty Exposure calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.