EV & Battery Manufacturing worked example

Battery Warranty Exposure at 1.3% expected battery warranty claim rate: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop expected battery warranty claim rate to 1.3%, then walk the calculation through step by step. Estimate battery warranty exposure from vehicles or packs in service, expected claim cost, claim rate, and fixed campaign cost.

The inputs for this scenario

  • Exposed packs or vehicles in field: 18,000 packs/vehicles (held at the documented default)
  • Average cost to settle one battery claim: 3,400 $ / claim (held at the documented default)
  • Expected battery warranty claim rate: 1.3 % (the input this scenario stresses; the baseline uses 1.8)
  • Fixed recall campaign and support cost: 250,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable battery warranty cost = exposed population × claim cost × expected claim rate.
  • Total battery warranty exposure works out to 1,045,600 $ at these inputs, and this is the headline figure for the scenario.
  • Warranty exposure per exposed unit works out to 58.09 $ / exposed unit at these inputs.
  • Variable battery warranty cost works out to 795,600 $ at these inputs.
  • Fixed campaign/support cost works out to 250,000 $ at these inputs.

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 22.64% below the baseline at 1,045,600 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to expected battery warranty claim rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes one flat average claim cost and a single claim rate; real failure distributions are time-dependent and bathtub-shaped, so blended assumptions understate early-life or end-of-warranty spikes.

Results at a glance

  • Total battery warranty exposure: 1,045,600 $ (headline result)
  • Warranty exposure per exposed unit: 58.09 $ / exposed unit
  • Variable battery warranty cost: 795,600 $
  • Fixed campaign/support cost: 250,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Battery Warranty Exposure calculator, set expected battery warranty claim rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.