If you were camping at an RV park or public campground it's not likely you'd find any 240 volt outlets there and CERTAINLY none that you could put your shore power plug into. IF you plugged into a 240 volt outlet with your 30 amp shore power, then sue the trailer park operator for having an illegal outlet available because they are NOT the same as your 30 amp plug.
The converter, converts 120 volt AC electricity to 12 volt for use in many items such as the fridge, water heater, air conditioner etc. All of these items take 12 volt DC power to operate the thermostats. It also supplies power to the water pump, trailer lights and a few other items in the trailer.
Usually there is ALSO a power distribution panel located close to the converter but not part of it, which takes shore power and distributes it to the outlets to operate 120 volt AC powered items like electric heating elements on the water heater, the air conditioner fan and compressor, the electric heater in the fridge cooling system etc. If EITHER of these items shorted out it can have effect on the operation of anything they power and it is always POSSIBLE to do damage to those electrical appliances.
A BATTERY when fully charged can replace the 12 volt DC power source if that's the problem but it has only a limited amount of power for operating things like the electric water heater, air conditioner and 120 volt outlets. To operate any of these things at ALL would require the purchase of an INverter to change 12 volt power to 120 volt AC power. The battery WOULD operate the lights, water pump, fridge (in LP mode) and the furnace (probably not using that now) but ONLY if the 12 volt part of those appliances has not been damaged.
You should have had a battery in the trailer already so what happens when you switch the fridge to LP mode? Do you have lights? Does the water pump work? It is VERY possible to operate for months at a time on just battery power provided you have a means of recharging the battery on a daily basis and don't need any of those 120 volt appliances that we often come to depend on. When I travel I rarely have 120 volt hook ups so that's how we travel MOST of the time (by choice). All that would be required is a stop at most any department store and purchase a 12 volt battery charger (between $30.00 and 100.00, depending on how good you want).
I'd suggest you check the state of charge in the battery, replace any fuses that most likely blew when the short occurred and give it a try, you just might like it if you don't need air conditioning.
Good luck / Skip
