Transparent by design
IT energy (kWh) = systems × average IT draw (kW) × powered-on hours. Facility energy = IT energy × PUE. Electricity cost = facility energy × price per kWh. Productive system-hours = systems × powered-on hours × productive utilisation. Annualised energy = monthly energy × 12, assuming an identical month.
Utilisation affects productive hours only; it does not reduce energy again because power is already an average draw assumption. Zero productive utilisation can still consume electricity. PUE must be at least 1; hours are capped at 744 for a 31-day month.
This is a screening tool, not a quote or engineering design. It excludes capital cost, staffing, software, demand charges, taxes, resilience reserves and emissions. It does not estimate tokens, throughput, GPU equivalence, cooling capacity or availability. Public-cloud electricity is often included in a service price and should not be double-counted.