what fuses are you looking at
the RV house side, fuses will be 'blade' fuses
several side by side in a row, in or near the same place as the RV 120v circuit breakers
your RV house fuses are NOT under the dash or HOOD/hatch, or have anything to do with the Automotive-chassis driving stuff
your batteries are charged, essential appliances have DC power, it appears batteries and converter are good
you have NOT described your lights
wall scones, most likely 120v
inset ceiling 12v florescent ?
12v ceiling fixtures using (2) 12v bayonet lamps ?
LED conversion ?
does your Television work, is your computer charging or running off battery ?