I recently bought a Krafttech2000w generator. Described as silent, it's anything but. It's also hopeless and was pushing out over 20v more than the recommended safety level causing damage to some of the electrical items on my boat. Worse still, the customer service at the company is terrible. To be fair, they did eventually offer a refund but not including return postage which, on a generator is pretty expensive. Amazon, I notice have pulled this model and you only need read the reviews to see why. Top of the range Honda's are pricey but very good. Cheaper and recommended by others are the Wolfe and Hyundai range. I also have a Clarke which is a bit noisier but does the job. It's difficult siting them on board. Not just because of the emissions but also because the natural acoustic of a steel-shelled boat amplifies the sound and vibration. I use mine when I'm moored away from others - and I occasionally moor in a solitary spot for a few hours just to use the generator - or surrounded by empty boats. As with anything, you've just got to mindful of others.