Grid-Scale Battery Energy Storage Systems worked example

HVAC Load with hvac connected load per bess container of 7.5 kW: a worked example

Suppose hvac connected load per bess container falls to 7.5 kW. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate thermal management HVAC energy cost for a grid-scale BESS container by combining HVAC connected load, daily operating hours, electricity rate, and MWh of storage capacity served to get total cost and cost per MWh stored.

The inputs for this scenario

  • HVAC connected load per BESS container: 7.5 kW (the input this scenario stresses; the baseline uses 15)
  • HVAC operating hours per day: 24 hr (held at the documented default)
  • Site electricity rate: 0.09 $ / kWh (held at the documented default)
  • Usable MWh per BESS container: 4 MWh (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total HVAC energy cost per day = HVAC connected load x HVAC operating hours x site electricity rate.
  • HVAC energy consumed per day (kWh) works out to 180 kWh at these inputs, and this is the headline figure for the scenario.
  • Total HVAC thermal management cost per day works out to 16.2 $ at these inputs.
  • Thermal management cost per MWh stored works out to 4.05 $ / piece at these inputs.
  • Hourly HVAC thermal management cost works out to 0.68 $ / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where hvac connected load per bess container sits at 15 kW and the headline result is 360 kWh, this scenario comes in 50% below the baseline at 180 kWh.
  • It computes daily HVAC energy use and cost per container, then normalizes thermal management cost per MWh of usable storage. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • HVAC energy consumed per day (kWh): 180 kWh (headline result)
  • Total HVAC thermal management cost per day: 16.2 $
  • Thermal management cost per MWh stored: 4.05 $ / piece
  • Hourly HVAC thermal management cost: 0.68 $ / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live HVAC Load calculator, set hvac connected load per bess container to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.