Inverter rating in kW or KVA

[phomer]

Why do some .ond files list inverter nominal AC power and maximum AC power in kW, while others do it in kVA? Is it possible to switch between the two in one .ond file?

[André Mermoud]

When the inverter is able to produce reactive power (i.e. able to produce a phase shift), the Nominal Power (PNom) may concern

- either a limitation in Active (real) energy, expressed as [kWh]

- or a limitation in Apparent energy, expressed as [kVA]. This limitation is rather usual as it is equivalent to an output current limitation.

This is a a property of the inverter, therefore a choice in the definition parameters.