A factory converter install
The converter is built into the load center that houses your circuit breakers and fuses
A stand alone inverter could be mounted anywhere between the transfer switch (switches power between generator and shore cord)
And the load center, normally installed not too far from the house batteries
Is there anything in the rv that needs 110vac that will work when the generator is off and the RV is not plugged into outside power
Example television, kitchen or bathroom outlet
Yes then you have an inverter some where
No then you do not, as you only have the converter behind the load center
Look for a hidden switch that is turned on
Perhaps you have holding tank heaters that are turned on, storage compartment lights that are on,
Defrost switch for the fridge doors, ??
The words inverter and converter are not interchangeable, they are different things that do the opposite of each other