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HTownGumpy,

I will offer some general advice, rather than specific analysis of your charging/load requirements.

If your goal is to run air conditioning without being attached to shore power, you will need a generator. However, my advice is to forego that goal, and be content to have air conditioning at the dockside.

Installing a generator is a big expense, both upfront and ongoing, and takes up critical space on a small boat. Add this to the expense and space taken by the air conditioning unit itself, and you are in deep.

Generally while underway, the breezes and open air of the ocean keep things tolerable. The same is often true when anchoring overnight, because the boat swings into the breeze and so air comes down the hatch and flows through the cabin nicely.

Also, you can pick and choose based on forecast, and plan to be hooked up to shore power on nights/days when you know it will truly be unbearably hot. This is the very workable compromise that most small boaters live with.