Hello, Florence
I'm looking at a small window air conditioner with shore power and perhaps a power pack with a solar feed.
In my little fiberglass camper which is located in Wyoming, it works well as there is a space to vent it out easily via a closet.
The Puck, located in the desert SW, US, (my winter home) has a fairly large vent in the door. I am wondering if I can use that location to vent a small portable window unit. I usually just use AC at night and could tuck AC unit out of the way.
There are free-standing units that would work in the closet (left of stove, facing front). They are really a swamp cooler, though, and adding humidity is alright in desert areas but not in humid areas like the UK or much of the US.
I really like to get off grid so the power pack is crucial. What year is your Puck? Have you gone out yet? That Maiden Voyage is so exciting!
Our campgrounds charge a flat fee which includes shore power. That's changing with the huge motorhomes eating up so much juice. Metering seems inevitable. Is your use metered?