You only have 7 posts, so I'll go thru this again:
Portable generators used as you envision are a very bad idea. Here are the reasons (from an earlier post I made on a similar thread):
Carbon Monoxide
Is simple to grasp, breath it in a confined space and you don’t wake up. Permanently mounted marine generators have their exhausts plumbed to exit at or very near the waterline and away from closed occupied spaces.
WHICH IS THE WORST POSSIBLE PLACE TO HAVE. THE HIGHER UP THE BETTER
Uncontained Fuel System Vents
The fuel systems on Honda and other portable generators are vented to the atmosphere and their carburetors have a bowl drain that releases fuel inside the generator case. That means where you run it, store it or put it under way will have gasoline fumes released in the area and if the bowl drain leaks, you have raw fuel spilled and an explosive liquid in the compartment with the generator.
NOR DO THEY HAVE TO BE IF THEY ARE NOT MOUNTED IN A CONFINED SPACE.
Lack of ignition protection on electrical devices
The electrical components on portables are not ignition protected like marine generator electrical components are. This means you could easily have an arc or spark anytime contact opens or closes or whenever something is plugged in ot disconnected.
AGAIN THIS DOES NOT APPLY IF THEY ARE NOT IN A CONFINED SPACE. ARE THEY ANY WORSE THAN A BBQ ON THE SWIM PLATFORM?
Lack of Continuous Grounding
Portable generators pose an additional shock hazard since the portable is not grounded to the boat or to a shore side ground. Likely not a problem with a drill or power tool, but if you connect it to your boat's AC system, you have essentially disconnected the green wire. Most small generators like the Honda and Yamaha are investor driven. An inverter drives both line and neutral so it is possible to have potential between neutral and ground. With ground bonded to the boat's bonding system, which mean to the water, this implies a shock hazard may exist that normally should not.
The USCG governs only boat manufacturers and the manufacturers voluntarily subscribe to ABYC guidelines, so there is no "law" against using portable generators on boats. However, both the USCG and ABYC say using portable generators on boat is a bad idea and regularly caution boaters against it. While accidents may be rare, you do substantially increase your risk of becoming a "statistic" when using a portable generator on a boat.......you put your family at unnecessary risk when you do so please don't.
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