Selection Guide · 2026-10-09

Single Phase vs Three Phase Generator: Which One Do You Need

Look at your equipment, not the building

Single phase 220V is used by lights, sockets, fridges, TVs, computers and small tools.
Three phase 380V or 400V is used by motors above about 2.2 kW, lifts, welding machines, pumps and compressors.

Why three phase motors need three phase supply

A three phase motor cannot be started from a single phase supply without extra equipment.
If your workshop or plant runs three phase motors, you need a three phase generator.

You can have both

Our small diesel generator sets can be configured for 110V, 220V or 380V and can supply single phase and three phase at the same time.
That means one set covers lighting and sockets as well as motor loads.

Balancing the load

On a three phase set, try to spread single phase loads evenly across the three phases.
A badly unbalanced load causes voltage fluctuation and can trip the breaker even when total power is low.
Tell us your load list and we will advise the right phase configuration before shipment.

Free tool: Still not sure what size fits your load? Our generator size calculator takes your appliance list and returns the recommended capacity in kW and kVA — including the starting surge for motors.

Need help choosing the right generator power?

Send us your equipment list and site conditions, we will recommend a model.

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