Your Melbourne may be like our Greyhawk and since it only has 30 amp service uses a power manager to shed amps when power becomes overloaded.
If you have one of those I would take a look there.
Funny thing is you said all works ok on shore power...maybe the breaker tripped on the generator. It is located on the genset kind of hidden on the side. I would check that first.
2018 Greyhawk 29MVP
2018 Jeep 4 Door Rubicon Recon
Retired and Under New Management (See Spouse For Details)