Yes, but not likely for a bad inverter. Check the simple things first. Do you have a voltmeter to check that both 120 volt legs of your 50 amp service have power. This could be something as simple as the campground 50 amp breaker, or a loose wire in your power cord at either end. If you do not have a voltmeter, try to find someone that does and have them check to make sure that you have 120 volts at EACH input leg of your main circuit breaker in your electrical panel. It could be a bad transfer switch a loose wire but all of that is just guessing without a voltmeter. My coach had a GFI circuit breaker in one of the basement compartments which is easy to overlook.
If I used the wrong word for anything, I hope someone will correct me rather than helping the OP. :R
