Check with the Hyundai importers in Pembroke (?) , South Wales . they also repair the generators , so should have the info you require . On the website their is a phone number IIRC.
Sorry chaps I never did get round to posting an update, the generator has been absolutely brilliant and can run the Rtec 181 at its maximum output.
I have it plugged in via the 32amp outlet using a splitter down to two 16amp sockets
One thing to note is the generator is an absolute lump to move about somewhere around 110kg with fuel in it.