Power Electronics, Motors & Drives worked example

Inverter Assembly Cost at 92% build volume captured: a worked example in power electronics, motors & drives

What does the result look like when build volume captured reaches 92%? The full calculation is worked below with real intermediate numbers. Use it when quoting traction inverters, industrial drives, VFD panels, DC-AC inverter assemblies, or converter subassemblies and you need a quick total cost view.

The inputs for this scenario

  • Inverter assemblies in scope: 100 assemblies (unchanged)
  • Assembly cost per inverter: 45 $ / assembly (unchanged)
  • Build volume captured: 92 % (raised for this scenario; the documented default is 80)
  • Fixed inverter program adder: 250 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable inverter assembly cost = inverter assemblies in scope × assembly cost per inverter × build volume captured) to the inputs above produces each figure below.
  • At this operating point the engine returns 4,390 $ for total inverter assembly cost, the number this scenario is built around.
  • At this operating point the engine returns 43.9 $ / piece for inverter assembly cost per unit.
  • At this operating point the engine returns 4,140 $ for variable inverter assembly cost.
  • At this operating point the engine returns 250 $ for fixed inverter program adder.

How this compares with the baseline

  • Against the tool's baseline example, where build volume captured sits at 80% and the headline result is 3,850 $, this scenario comes in 14.03% above the baseline at 4,390 $.
  • A figure at this level is achievable when build volume captured is genuinely sustained, not just peaked for a shift. The single blended per-assembly cost hides mix effects — a batch heavy in high-power SiC stages will run well above the average, so validate the blend against your actual BOM split.

Results at a glance

  • Total inverter assembly cost: 4,390 $ (headline result)
  • Inverter assembly cost per unit: 43.9 $ / piece
  • Variable inverter assembly cost: 4,140 $
  • Fixed inverter program adder: 250 $

Run it with your numbers

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

Last reviewed 2026-05-12.