EV Charging Infrastructure Manufacturing worked example

UL Compliance Workload with average compliance-test load of 230 kW: a worked example

What does the result look like when average compliance-test load reaches 230 kW? The full calculation is worked below with real intermediate numbers. a compliance engineer needs to estimate lab energy cost for charger certification workload

The inputs for this scenario

  • Average compliance-test load: 230 kW (raised for this scenario; the documented default is 90)
  • Compliance test runtime: 40 hr (unchanged)
  • Lab electricity rate: 0.16 $ / kWh (unchanged)
  • Compliance test articles or runs: 3 tests (unchanged)

Working through the calculation

  • Applying the documented formula (Compliance workload energy cost = average compliance-test load × compliance runtime × lab electricity rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,472 $ for ul compliance workload energy cost, the number this scenario is built around.
  • At this operating point the engine returns 9,200 kWh for ul compliance workload energy used.
  • At this operating point the engine returns 491 $ / test for compliance energy cost per test article/run.
  • At this operating point the engine returns 36.8 $ / hr for hourly compliance workload energy cost.

How this compares with the baseline

  • Against the tool's baseline example, where average compliance-test load sits at 90 kW and the headline result is 576 $, this scenario comes in 156% above the baseline at 1,472 $.
  • A figure at this level is achievable when average compliance-test load is genuinely sustained, not just peaked for a shift. It models only metered electricity drawn during the test; it excludes demand charges, HVAC load to reject heat, lab labor, fixture amortization, and NRTL witness fees, which often dwarf the raw energy cost.

Results at a glance

  • UL compliance workload energy cost: 1,472 $ (headline result)
  • UL compliance workload energy used: 9,200 kWh
  • Compliance energy cost per test article/run: 491 $ / test
  • Hourly compliance workload energy cost: 36.8 $ / hr

Run it with your numbers

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

Last reviewed 2026-05-12.