Microgrid & Distributed Energy Equipment worked example

Grid Interconnect Review Load with connected test load of 30 kW: a worked example

Push connected test load up to 30 kW and the picture changes. This example computes every intermediate figure at that operating point. Use it when interconnection witness testing or grid-tie review of microgrid and distributed energy equipment needs a defensible energy number for the budget or quote.

The inputs for this scenario

  • Connected test load: 30 kW (raised for this scenario; the documented default is 12)
  • Witness test runtime: 8 hr (unchanged)
  • Blended electricity rate: 0.12 $ / kWh (unchanged)
  • Interconnection points reviewed: 1,000 points (unchanged)

Working through the calculation

  • Applying the documented formula (Total interconnection review energy cost = connected test load × witness test runtime × blended electricity rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 240 kWh for interconnection review energy used, the number this scenario is built around.
  • At this operating point the engine returns 28.8 $ for total interconnection review energy cost.
  • At this operating point the engine returns 0.03 $ / piece for energy cost per interconnection point.
  • At this operating point the engine returns 3.6 $ / hr for hourly interconnection review energy cost.

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 150% above the baseline at 240 kWh.
  • It computes the kWh drawn by the test load over the witness runtime, the dollar cost at your blended rate, and that cost spread across the number of interconnection points reviewed. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Interconnection review energy used: 240 kWh (headline result)
  • Total interconnection review energy cost: 28.8 $
  • Energy cost per interconnection point: 0.03 $ / piece
  • Hourly interconnection review energy cost: 3.6 $ / hr

Run it with your numbers

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

Last reviewed 2026-05-12.