Energy worked example

Power Cost with machine power of 45 kW: a worked example

This scenario runs the power cost calculation on the strong side: machine power of 45 kW, with every other input held at its documented default. Use when energy cost belongs in the production estimate.

The inputs for this scenario

  • Machine power: 45 kW (raised for this scenario; the documented default is 18)
  • Run time: 8 hr (unchanged)
  • Electricity rate: 0.12 $ / kWh (unchanged)
  • Demand charge / other fees: 10 $ (unchanged)
  • Units produced: 850 units (unchanged)

Working through the calculation

  • Applying the documented formula (kWh = kW × run hours) to the inputs above produces each figure below.
  • At this operating point the engine returns 53.2 $ / run for power cost, the number this scenario is built around.
  • At this operating point the engine returns 360 kWh for energy used.
  • At this operating point the engine returns 0.06 $ / part for cost per part.
  • At this operating point the engine returns 6.65 $ / hr for average hourly cost.

How this compares with the baseline

  • Against the tool's baseline example, where machine power sits at 18 kW and the headline result is 27.28 $ / run, this scenario comes in 95.01% above the baseline at 53.2 $ / run.
  • Use it when loading energy into part cost, comparing the running cost of two machines, or building the case for an efficiency or off-peak-scheduling change. 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

  • Power cost: 53.2 $ / run (headline result)
  • Energy used: 360 kWh
  • Cost per part: 0.06 $ / part
  • Average hourly cost: 6.65 $ / hr

Run it with your numbers

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

Last reviewed 2026-05-12.