Power converter question -

[mickmanor]

Is power converter AC power consumption proportional to power drawn?

I am curious about how much shore power my converter is actually using.
I cannot find any spec about the wattage on my 2012 model.

New power converters do have specs for an input of 110v and 940 watts.
Does that mean that the converter is using 940 watts all the time,
or does that wattage fluctuate with whatever the dc demand is on the converter?
Does the AC usage interact?

Hope my question makes some sense to somebody...