5.5kw Onan genset in my 2011 toy hauler belt broke

I just received a call from the Camping World service center stating the belt on my generator broke. Of course this is not covered and I would not expect it to be but the generator only has 104 hours on it and the toy hauler is only two years old. Does this sound normal for a generator or not? I mentioned to the person who called yesterday that I would really like to know why the belt broke with so little use so I am not spending another $600 in two years to get it done again.

Your thoughts.