Generator Sizing Tool Calculator
Generator Sizing Tool Calculator
Calculate Required Generator Size (kVA)
This Generator Sizing Calculator helps electrical engineers, technicians, and industrial professionals determine the correct generator capacity based on connected load, power factor, and efficiency.
Result
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Generator Sizing Formula
Generator Size (kVA) is calculated using the formula:
kVA = kW ÷ (Power Factor × Efficiency)
Example Calculation
If:
- Total Load = 100 kW
- Power Factor = 0.8
- Efficiency = 90%
Then:
Generator Size = 100 ÷ (0.8 × 0.9) = 138.89 kVA
Why Generator Sizing is Important?
Correct generator sizing ensures:
- Reliable power backup
- Reduced fuel consumption
- Better efficiency
- Longer generator life
- Protection against overload
Applications of Generator Sizing
- Industrial Plants
- Commercial Buildings
- Hospitals
- Data Centers
- Construction Sites
- Residential Backup Systems
Important Notes
- Always keep 20% future load margin.
- Use correct power factor for accurate calculation.
- Consider motor starting current for heavy loads.
- Verify generator rating before installation.
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