Dennis, I boat on L.I. and have had an AC-equipped boat (previous 27 Four Winns and current Carver) for 5 years. I have never needed to use the A/C when I anchored out, away from shore power. Every Spring I consider buying a genny, and every Fall I realize I didn't need it. Not even considering it this year. It's just one more 'device' that I'd need to feed and care for.
- When at anchor, the breeze through the open hatches keeps us cool. Don't need A/C.
- I have an alcohol/electric cooktop and cook with alcohol. Works fine. I've also used a propane camp stove, which also works great. In additon to the regular coffee maker, I have a percolator that sits on the cooktop to make coffee when I'm away from the dock.
- We pre-load and pre-chill the fridge. Then turn it down/off when at anchor. We rely primarily on a cooler. A Coleman 'Extreme' keeps stuff cold for a couple days.
- Run the engine for 20 minutes to heat water, then shower. The same or less time than you'd need to run a genny to heat water with AC current.
- A generator is unwelcome noise in an otherwise peaceful setting. I wouldn't want to hear mine, either.
Before you buy any genny, you should know the specs on your A/C unit, then buy the lightest one that'll power it. I can't see anyone humping a 100-lb genny on and off a moving swim platform. You need to know 'starting' amps. That'll tell you what you need to buy
My .02