Sizing tool
Generator sizing calculator
Enter your connected load — or build a detailed list of lighting, AC, motor and lift loads — and get a recommended kVA rating with the full step-by-step working shown.
Sizing parameters
Sizing breakdown
- Connected load100.0 kW
- Diversity-adjusted load (× 0.8)80.0 kW
- Running kVA (÷ pf 0.8)100.0 kVA
- Base requirement (max of the above)100.0 kVA
- Headroom (+15%)115.0 kVA
- Rounded to nearest catalogue rating125 kVA
This is indicative sizing — a site survey confirms the final selection.