I'll throw myself into the flames of opposition here. I have been using my Honda eu2000i for 11 years without killing myself or irritating my neighbors (to my knowledge
).
I keep it secured on my FB bench seat where I seldom sit and steer. I use my FB as more of an attic with a $1,000,000 view. I store my generator, assorted chemicals like acetone, teak oil, fuel additives and gasoline there in separate, safe, well-vented but protected storage containment.
My routine, especially during this CV Crisis, is to start the generator when I awake to make coffee and breakfast while I charge the batteries from their typical 70-80% morning state of charge. It normally runs for 30-45 minutes while I'm doing my morning routine. If I relocate once or twice throughout the day, I won't need to run the generator again. If not, I'll run it and the stbd engine (120A Balmar and hot water circuit) to warm water for my afternoon/evening shower then let it continue to run ~30 minutes while I'm showering/dressing. This leaves me with enough hot water and electrons to enjoy regular use of the boat's systems without restrictions through morning. (I'm not camping!!)
My batteries live in a SOC of 70-95% while on the hook.
Since I normally anchor solo where I fish, I'm not bothering anyone with the noise. It's mounted on a set of cushions on the FB bench seat padded seat so the vibes and noise in the salon are very subdued, albeit noticeable. My FB does not have isenglass and is protected with lashed sunbrella fabric and a bimini that allows good ventilation with weather protection. I also have a helm canvas and generator cover when needed.
I never use the generator when I'm sleeping since we don't have/need air conditioning in NorCal. I service the generator regularly and monitor its components and environment for hazards and wear. I understand that it's not for everyone but to those who state emphatically that there is no place for one of those generators on a boat, I suggest you broaden your horizons to look beyond your own set of limitations.
Not all boats are created equal.
OK, I'm donning my flame-retardant suit. Let the fireworks begin!!