What Size Generator Do I Need for a Small Workshop?

Typical loads in a small workshop

• Lighting and fans: 0.5-2 kW
• Hand tools and small machines: 1-3 kW
• Air compressor (starting): 3-6 kW
• Welding machine: 5-10 kW depending on rod diameter

A quick matching table

• Lighting, fans, TV, fridge only: 3-5 kW is enough.
• Hand tools plus lighting and a small pump: 6-9 kW.
• Air compressor or small welding work: 10.5-15 kW.
• Multiple machines running at the same time: 18 kW and above.

Why a diesel generator, not petrol

• Diesel engines run at lower speed with higher torque, so they handle motor starting better.
• Fuel consumption per kWh is lower and the engine life is longer, which matters if you run several hours a day.

Add up, then round up

• Add all loads that will run at the same time, add 25% margin, then choose the nearest model above it.
• Send us your equipment list and we will recommend the exact model.