[Motor31]

Since you have unit that is blowing fuses when plugged in it seems there is a problem with the Xantrex. I'd get that checked out or continue to have problems. It either is defective, too small for the load, is installed wrong or has a wiring problem further down the line. It may have also taken out fuses for other items. Have you checked all of the 12 volt fuses in the electrical box area inside the trailer?

Continuous fuse blowing is not something to take lightly. The fuses are there to protect wiring and prevent fires. If they are blowing, find out what is doing it before you up the fuse amperage to the point where the wires heat up and cause a fire. Your other 12 volt items (like the fridge) may also be more expensive than the Xantrex so be careful what you risk with it.