Emergency Generator Sizing Calculator

Emergency Generator Sizing

Calculate the required emergency generator size in kW or kVA for backup power based on critical loads, motor starting requirements, and step loading sequence.

Lighting Load (kW)

HVAC Load (kW)

Largest Motor (HP)

Other Critical Loads (kW)

Power Factor

Formula

Total Running kW = Lighting + HVAC + Critical Loads + Motor kW; Motor Start kW = Motor HP x 0.746 x 3; Peak kW = Running Loads + Motor Start kW; Required kVA = Peak kW / Power Factor

Frequently Asked Questions

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