Grid-Scale Battery Energy Storage Systems worked example

Compliance Test Load with compliance test load power draw of 1,300 kW: a worked example in grid-scale battery energy storage systems

This scenario runs the compliance test load calculation on the strong side: compliance test load power draw of 1,300 kW, with every other input held at its documented default. Use it when budgeting the electricity cost for BESS type testing, acceptance testing, or grid compliance testing and you need a per-unit energy cost to include in the test facility overhead model.

The inputs for this scenario

  • Compliance test load power draw: 1,300 kW (raised for this scenario; the documented default is 500)
  • Compliance test duration: 8 hr (unchanged)
  • Test facility electricity rate: 0.1 $ / kWh (unchanged)
  • BESS units under simultaneous compliance test: 5 units (unchanged)

Working through the calculation

  • Applying the documented formula (Total compliance test energy cost = compliance test load x test duration x electricity rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 10,400 kWh for total compliance test energy consumed (kwh), the number this scenario is built around.
  • At this operating point the engine returns 1,040 $ for total compliance test energy cost.
  • At this operating point the engine returns 208 $ / piece for compliance test energy cost per bess unit.
  • At this operating point the engine returns 130 $ / hr for hourly compliance test energy cost.

How this compares with the baseline

  • Against the tool's baseline example, where compliance test load power draw sits at 500 kW and the headline result is 4,000 kWh, this scenario comes in 160% above the baseline at 10,400 kWh.
  • Use it when scoping the OPEX of a UL 9540A, capacity-verification, or factory acceptance test campaign and you need a defensible per-unit cost to load into the bill of materials. 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

  • Total compliance test energy consumed (kWh): 10,400 kWh (headline result)
  • Total compliance test energy cost: 1,040 $
  • Compliance test energy cost per BESS unit: 208 $ / piece
  • Hourly compliance test energy cost: 130 $ / hr

Run it with your numbers

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

Last reviewed 2026-05-12.