Total IT equipment power draw in kW. This is the denominator of the PUE calculation. Include all servers, storage, and networking equipment. Typical: 500-5000 kW for enterprise, 5-50 MW for hyperscale datacenters.

UPS topology type. online_double_conversion: highest protection, 92-96% efficient. line_interactive: 95-98% efficient, less isolation. rotary: 95-97% efficient, uses flywheel energy storage. If omitted, defaults to 'online_double_conversion'.

UPS efficiency as a percentage at the operating load point. If omitted, looked up from the UPS reference table by topology. Typical range: 92-97%.

Primary cooling system type. air_economizer: ~5% of IT load. chilled_water: ~30%. DX (direct expansion): ~40%. liquid_to_chip: ~10%. Determines default cooling power fraction. If omitted, defaults to 'chilled_water'.

Cooling power as a fraction of IT load (e.g., 0.3 = 30% of IT load). Overrides the default fraction for the selected cooling_type. Use when actual cooling system data is available. If omitted, defaults to a standard fraction by cooling type.

Datacenter white space lighting power in kW. If omitted, estimated as 0.5% of IT load. Typical: 1-5 kW for small-to-medium rooms.

Switchgear power losses as a percentage of IT load. Typical: 0.5-2%. Accounts for resistive and magnetic losses in main switchboard and ATS. If omitted, defaults to 1.0%.

Transformer power losses as a percentage of IT load. Typical: 1-3%. Includes PDU transformers stepping 480V down to 208V or 415V. If omitted, defaults to 1.5%.

Power distribution unit losses as a percentage of IT load. Typical: 1-3%. Includes cabling, breaker, and busway losses from transformer to rack. If omitted, defaults to 2.0%.

Standby generator parasitic loads in kW (block heaters, battery chargers, controls). Only counted when generators are in standby. Typical: 1-10 kW per generator. If omitted, defaults to 0 kW (no generator parasitic load).

Blended electricity cost in USD per kWh for annual cost projection. US average commercial: $0.07-0.12/kWh. Includes demand charges if applicable. If omitted, defaults to $0.08/kWh.