Here's another method from the Gemini 105 forum:
"I solved the problem.
How do you use a Honda EU2000i Generator to run a 16,500 btu Mermaid AC on econo-mode?
Answer: Run the AC saltwater cooling pump and AC air blower from an inverter and at the same time run the Battery Charger.
The generator has power to spare in running the compressor and battery charger.
My Mermaid AC freezes me out at 58 degrees in the cabin so I will still use the 5200 btu window AC after the Mermaid AC cools and dehumidifys the cabin. This takes about 20 minutes.
I have photo's posted in the Quiet Place 766 Album.
paul cobb 766 Quiet Place"