Two ratings for the same machine
Generators are often rated in kVA, and appliances in kW or watts. kVA measures apparent power. kW measures real power, the part that actually does work.
The link between them
Real power equals apparent power multiplied by the power factor. Many generators are rated at a power factor of 0.8. At 0.8, a 10 kVA generator delivers about 8 kW of real power.
A worked example
If your equipment needs 6 kW of running power, divide by 0.8. You need at least 7.5 kVA. Add headroom for starting surge, and a 10 kVA unit becomes a sensible choice.
Always read the plate
Look for both the kVA and kW ratings on the nameplate, and for the power factor. If only one is given, ask the supplier for the other before you buy.
