Hi Raymo
One thing I have noticed on generators. is that they have the peak kW in
large font and the continuous kW in a much
smaller font.
Just check which number you are looking at.
Example
https://www.bunnings.com.au/ryobi-12...rator_p0034585
Rated wattage continuous (watts) 1000
Rated wattage peak (watts) 1200
Also, it doesn't seem to state whether it is pure or modified sine wave.
Philip