I'm assuming by your statement "We're not getting power to any of the appliances all of a sudden" that things were working when all of a sudden it all shut down. If this is the case, there are some fuses associated with the generator itself found on or right beside the generator, in the generator compartment outside the living quarters of the RV. Not sure what brand of genny you have, but mine is a Generac, and they are on the actual generator unit, and they would control power leaving the unit to power the RV.
Ken and Terry
2010 Georgetown 330TS being pushed by our
2017 GMC Terrain toad (4 wheels down)