Diesel Generator Sizing & Capacity Calculator
This engineering tool helps you determine the exact generator size (kVA) based on your load profile. Add multiple motors with different starting methods (DOL, Star‑Delta, Soft Starter, VFD), include lighting and other loads, and apply a safety factor. The calculation follows ISO 8528 standards and recommends a standard commercially available generator size.
Generator Sizing Calculator
Calculate required generator size in kVA · Add multiple motors with different starting methods
Input Parameters
Direct Online (DOL)
6.0x
Small motors under 10kW · Pumps, fans
Star-Delta
3.0x
Medium motors 10–100kW · Compressors, crushers
Soft Starter
2.5x
Controlled acceleration · Conveyors, pumps
VFD
1.5x
Precision equipment · HVAC, pumps
Total kVA for all lighting equipment (indoor/outdoor)
Non-motor loads: computers, HVAC, office equipment
Standby: 20–25% · Prime: 10–15% · Peak shaving: 15–20%
Calculation Results
Lighting Load:
0 kVA
Other Loads:
0 kVA
Motor Loads (with starting):
0 kVA
Total Connected Load:
0 kVA
Recommended Generator Size
0
kVA
