Depends on the type of coach and the size of the converter. For most smaller, lower cost mass production RVs the inverter is for a few entertainment outlets, so they can be powered by the engine alternator output when under way. Inverter is usually 1 kw or smaller.
In many larger coaches, the inverter is 3-8 kw or larger, powering every 120 V outlet when you are not plugged in or running the generator, might be feeding from 400-800 pounds of batteries and 200-400 amps of alternator output, and backed up by an auto-start generator when batteries start to be depleted.
On your Sunrise, it is most likely the entertainment center version of inverter power.