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Generator Size Guide for Nigeria: kVA, kW, Amps and Fuel Use
Generators are sold in kVA, but your equipment is rated in kW or hp. At a 0.8 power factor, kW is kVA times 0.8, and the table below gives the usual conversions.
Fuel and current figures are planning numbers for three-phase 415 V sets. Always confirm against the manufacturer's data for the exact model.
If you are unsure, send us your load list and we will help you choose a size.
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- List of equipment and their kW or hp ratings
- Single-phase or three-phase supply
- Largest motor you need to start
- Open set, soundproof canopy or containerised
- Delivery location and required date
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kVA to kW, Amps and Diesel Use
- 20kVA: about 16 kW, about 28 A at 415 V, about 3.1 L/h at 75% load
- 30kVA: about 24 kW, about 42 A at 415 V, about 4.7 L/h at 75% load
- 60kVA: about 48 kW, about 83 A at 415 V, about 9.4 L/h at 75% load
- 100kVA: about 80 kW, about 139 A at 415 V, about 15.6 L/h at 75% load
- 150kVA: about 120 kW, about 209 A at 415 V, about 23.4 L/h at 75% load
- 200kVA: about 160 kW, about 278 A at 415 V, about 31.2 L/h at 75% load
- 250kVA: about 200 kW, about 348 A at 415 V, about 39 L/h at 75% load
- 350kVA: about 280 kW, about 487 A at 415 V, about 54.6 L/h at 75% load
- 500kVA: about 400 kW, about 696 A at 415 V, about 78 L/h at 75% load
- 625kVA: about 500 kW, about 870 A at 415 V, about 97.5 L/h at 75% load
- 800kVA: about 640 kW, about 1113 A at 415 V, about 125 L/h at 75% load
- 1000kVA: about 800 kW, about 1391 A at 415 V, about 156 L/h at 75% load
- 1250kVA: about 1000 kW, about 1739 A at 415 V, about 195 L/h at 75% load
- 1500kVA: about 1200 kW, about 2087 A at 415 V, about 234 L/h at 75% load
- 2000kVA: about 1600 kW, about 2782 A at 415 V, about 312 L/h at 75% load
How to Size a Generator
- Add up the loads that run at the same time in kW
- Multiply by 1.25 to 1.3 to leave headroom for starting current
- Convert to kVA by dividing by 0.8
- Choose the next standard size up, then check the largest motor start
Frequently Asked Questions
How do I convert kVA to kW?
Multiply kVA by the power factor, usually 0.8 for generators. A 100kVA set gives about 80 kW.
Is it better to size up or down?
Size to your real load with about 30 percent headroom. Too small struggles with motor starts, and too large wastes fuel at light load.
Generators in our store
Real listings with specs. Request a quote or make an offer.
NewCummins 1500 kVA Diesel Generator (New)
LagosAvailable to order
- Rating
- 1500 kVA
- Fuel
- Diesel
- Phase
- 3-phase, 50 Hz
- Enclosure
- Container
UsedCummins 1500 kVA Diesel Generator (Used)
LagosInspection on request
- Rating
- 1500 kVA
- Fuel
- Diesel
- Phase
- 3-phase, 50 Hz
- Condition
- Used
NewPerkins 500 kVA Diesel Generator (New)
LagosAvailable to order
- Rating
- 500 kVA
- Fuel
- Diesel
- Phase
- 3-phase, 50 Hz
- Enclosure
- Canopy
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