How do you calculate the energy cost of a test run?

Multiply the connected load in kW by the runtime in hours to get kWh, then multiply by your electricity rate. A 12 kW load over 8 hours uses 96 kWh, which at $0.12 per kWh costs $11.52 for the run.

How do I find the energy cost per unit?

Divide the total energy cost by the number of flight units processed during that runtime. Here $11.52 spread across 1,000 units is about $0.0115 per unit, a small but real per-unit figure for a quote.

Why include test-equipment energy in a payload quote?

Thermal-vacuum, vibration, and cleanroom equipment draw large connected loads over long campaigns. Pricing energy explicitly, rather than leaving it in overhead, makes the quote more defensible and helps compare short and long test soaks.

What is the hourly energy cost of the test run?

Divide total cost by runtime, or multiply connected load by the rate. In the example the run costs $1.44 per hour, which is useful for pricing extended test soaks by the hour.

Does connected load equal actual power draw?

Not always. Connected load is the rated draw; if equipment cycles or idles, actual consumption is lower. Use a demand factor or metered data when a bench does not run flat out for the full runtime.

How does a longer test campaign change the cost?

Energy scales directly with runtime, so doubling the soak doubles the kWh and cost. At $1.44 per hour, a 40-hour thermal-vac campaign on this load would run about $57.60 in electricity before adding facility overhead.

Space Payload & Avionics Manufacturing calculator

Space Payload Quote Confidence Calculator

This calculator sizes the electricity energy and cost consumed during a payload integration and test (I&T) run so you can fold a defensible energy figure into a quote. Cleanroom HVAC, thermal-vacuum chambers, vibration tables, and avionics test benches draw real power over long test campaigns, and that cost belongs in the quote rather than buried in overhead. Estimators and facilities engineers use it to attach a per-unit energy cost to a build, and to see how a long test soak changes the number. It turns connected load, runtime, and your utility rate into energy used, total cost, and cost per unit processed.

What this calculator does

Estimate space payload quote confidence for space payload and avionics manufacturing using production-ready inputs so teams can budget energy cost, compare equipment settings, or include electricity in the quote.
Use it when space payload quote confidence in space payload and avionics manufacturing is being quoted and energy is a real chunk of the space payload and avionics manufacturing cost stack.
It computes energy used as connected load times runtime, the electricity cost at your blended rate, and the energy cost allocated per flight unit processed.

Formula used

Total space payload quote confidence energy cost = space payload quote confidence connected load × space payload quote confidence runtime × blended electricity rate
Energy cost per kWh = total energy cost ÷ units processed during runtime

Inputs explained

Cleanroom and Test Equipment Connected Load:
Integration and Test Runtime:
Blended Electricity Rate:
Flight Units Processed During Runtime:

How to use the result

Use it while building a quote or a facilities cost model for a payload I&T campaign, where test-equipment energy is a line item worth defending.
It assumes the equipment runs at full connected load for the entire runtime, so it overstates energy for benches that idle, cycle, or ramp rather than running flat out.

Current U.S. benchmarks

As of Apr 2026, industrial electricity averages 8.7 cents per kWh across the U.S. (EIA), up 5.5% from a year earlier. State averages range widely, so plants should confirm against their own tariff.
Global copper trades at $13,484 per tonne (IMF via FRED, May 2026), up 41.5% in a year, and U.S. industrial electricity averages 8.66 cents per kWh. Both feed electrified-hardware unit economics.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate the energy cost of a test run? Multiply the connected load in kW by the runtime in hours to get kWh, then multiply by your electricity rate. A 12 kW load over 8 hours uses 96 kWh, which at $0.12 per kWh costs $11.52 for the run.
How do I find the energy cost per unit? Divide the total energy cost by the number of flight units processed during that runtime. Here $11.52 spread across 1,000 units is about $0.0115 per unit, a small but real per-unit figure for a quote.
Why include test-equipment energy in a payload quote? Thermal-vacuum, vibration, and cleanroom equipment draw large connected loads over long campaigns. Pricing energy explicitly, rather than leaving it in overhead, makes the quote more defensible and helps compare short and long test soaks.
What is the hourly energy cost of the test run? Divide total cost by runtime, or multiply connected load by the rate. In the example the run costs $1.44 per hour, which is useful for pricing extended test soaks by the hour.
Does connected load equal actual power draw? Not always. Connected load is the rated draw; if equipment cycles or idles, actual consumption is lower. Use a demand factor or metered data when a bench does not run flat out for the full runtime.

Last reviewed 2026-05-12.