I just bought an 01 280 Sundancer with a 5kw Kohler. We also have a motorhome that has a diesel 15kw Onan generator. We run the generator in our Bus when we aren't plugged into 50amp power. On the road, parked sleeping in a rest stop or truck stop etc. I was assuming the generator in our boat was designed to use the same way. However, our mechanic said NEVER to run the generator overnight while sleeping. I was thinking that, just like the motorhome, if we kept newer CO sensors (I was planning to have 2 in the cabin and 1 in the cockpit) that we would be safe. Is my mechanic being overly cautious or is this something that I just didn't know.