https://chilisleep.co.uk/products/ooler-sleep-system

FINALY A DECENT AC SUBSTITUTE
Global warming is coming? Obviously and hot nights can be a unpleasant. So air-condition is quite a thing to add to a sail boat, and on top of that
Very power thirsty, at 150W/h this is no brainer. How it works, it’s a water-cooled madrasa, that by the way can go warm too,
One big disadvantage can be the shape, it’s not coming in triangles :)))) so u have to figure that out yr self let it hang or folded
And one more thing, u need an inverter obviously and a decent battery bank, but on a 35 foot boat is for sure doable or in the marina connected to the mains