Microgrid & Distributed Energy Equipment worked example

Grid Interconnect Review Load with connected test load of 6 kW: a worked example

This worked example runs the grid interconnect review load numbers for a tougher week than the baseline: connected test load of 6 kW instead of the typical 12 kW. Estimate the electricity used and cost during grid interconnection witness testing and grid-tie review of microgrid and distributed energy equipment, so teams can budget test energy, compare anti-islanding test setups, or include it in the quote.

The inputs for this scenario

  • Connected test load: 6 kW (the input this scenario stresses; the baseline uses 12)
  • Witness test runtime: 8 hr (held at the documented default)
  • Blended electricity rate: 0.12 $ / kWh (held at the documented default)
  • Interconnection points reviewed: 1,000 points (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total interconnection review energy cost = connected test load × witness test runtime × blended electricity rate.
  • Interconnection review energy used works out to 48 kWh at these inputs, and this is the headline figure for the scenario.
  • Total interconnection review energy cost works out to 5.76 $ at these inputs.
  • Energy cost per interconnection point works out to 0.01 $ / piece at these inputs.
  • Hourly interconnection review energy cost works out to 0.72 $ / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where connected test load sits at 12 kW and the headline result is 96 kWh, this scenario comes in 50% below the baseline at 48 kWh.
  • Use it when planning or invoicing IEEE 1547 witness testing, protection-relay verification, or PCC commissioning where a known test load is energized for a measured duration. 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

  • Interconnection review energy used: 48 kWh (headline result)
  • Total interconnection review energy cost: 5.76 $
  • Energy cost per interconnection point: 0.01 $ / piece
  • Hourly interconnection review energy cost: 0.72 $ / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Grid Interconnect Review Load calculator, set connected test load to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.