Mining Vehicle & Underground Equipment worked example

Battery-Electric Retrofit Payback with retrofit capital investment of 12,500 $: a worked example

This worked example runs the battery-electric retrofit payback numbers for a tougher week than the baseline: retrofit capital investment of 12,500 $ instead of the typical 25,000 $. Estimate battery-electric retrofit payback for mining vehicle and underground equipment using production-ready inputs so teams can screen a capital project before a detailed business case.

The inputs for this scenario

  • Retrofit capital investment: 12,500 $ (the input this scenario stresses; the baseline uses 25,000)
  • Annual diesel and operating savings: 18,000 $ / yr (held at the documented default)
  • Annual battery support and maintenance cost: 2,500 $ / yr (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Net annual battery-electric retrofit payback savings = annual battery-electric retrofit payback savings - annual battery-electric retrofit payback support cost.
  • Battery-electric retrofit payback payback period works out to 0.81 yr at these inputs, and this is the headline figure for the scenario.
  • Net annual battery-electric retrofit payback savings works out to 15,500 $ / yr at these inputs.
  • Battery-electric retrofit payback investment works out to 12,500 $ at these inputs.
  • Five-year net battery-electric retrofit payback value works out to 65,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where retrofit capital investment sits at 25,000 $ and the headline result is 1.61 yr, this scenario comes in 50% below the baseline at 0.81 yr.
  • Use it when building the business case for converting a mining vehicle to battery-electric, or ranking which fleet units to retrofit first. 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

  • Battery-electric retrofit payback payback period: 0.81 yr (headline result)
  • Net annual battery-electric retrofit payback savings: 15,500 $ / yr
  • Battery-electric retrofit payback investment: 12,500 $
  • Five-year net battery-electric retrofit payback value: 65,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Battery-Electric Retrofit Payback calculator, set retrofit capital investment to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.