Thank you all for your responses. I should have been more specific as to my intended use. Our Onan works great but is a little loud and very thirsty meaning it uses quite a bit fuel. We often dry camping for several days to a week at a time and just want to keep the batteries charged, use the lights, microwave, and TV at night. We have a residential refrigerator, which runs on electricity only, not propane and it can drain down the batteries after all day on the inverter. It would be nice to run a quiet generator at night to recharge the 8- house batteries. If it is hot out, we would definitely use the larger Onan to run both ACs. Our last coach was a Tiffin Allegro Bus, the fridge would switch over to propane and we could use a small Honda and a gallon of gas at night to recharge the batteries. The Monaco doesn't even recognize the Honda as been there, so we were looking at the Predators and wondered at what level, if any would work for our coach.
Thank you Tom Wallis- your reply was very helpful, but I still don't know if that would be enough to run an Executive even under limited use. More comments are welcome and Thank you.