Our h320 came with a 12,500 btu unit and runs fine with the Honda eu2000. We set it on a pad (avoids black markings ) on the port side swim platform locker. We tie it up with a safety line to avoid loosing it overboard and use a short pigtail adapter to connect to the boats shorepower plug. In the mornings we switch the A/C off and run a coffeemaker and microwave oven. While running A/C we also run the inboard battery charger. As far as noise it is just a hum down inside the cabin and it is not bad even sitting on the cockpit. As a point of courtesy we try to anchor downwind from others but most people down here use them as the summer heat and humidity can be brutal.