I recently purchased a 1994 prowler travel trailer. The ac unit would not turn on and it would not run a 1300 watt microwave. When I took it to the trailer repair shop, it worked just fine when they plugged it in to their 30 amp outlet. They said there was probably something wrong with my generator (3500 running 4000 watt peak). This initially made sense to me until I borrowed my father in laws generator ( 5500 watts running 6000 watts peak) and it still won't run the ac or microwave. Both generators are new and will run all the 110 lights, accessories etc. If anyone has expierienced something similar please let me know.