It depends on how keen one is to reproduce the authentic and rapid wok cooking technique. I tend to steam or stew a stir fry more than sizzle, unless I use the wok burner on the BBQ.
A very basic gas wok burner will be rated at approx 20MJ or nominally 5.5kW electric. The larger burners found in commercial (Local Chinese) will have greater capacity up to approx 60MJ or 16.7kW electric.
I can’t explain the cooking science.
