[fireman660r]

I have a 2006 cherokee 285 BH+ fifth wheel. Slept in it for the first time last night and this morning while stirring around I noticed what sounded like a fan in the inverter kicking on and off as I turned lights on and off. If one light was in the fan would stay off, but if I turned multiple lights on then the fan noise would begin. I had no other appliances turned on and am plugged in to a 10 amp 110 volt outlet. Is this normal, as I didn't notice the fan yesterday when working and cleaning the camper? Thanks for the help.