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Head down to your nearest Camper dealership.

Poor man's a/c unit.


http://www.compactappliance.com/xq/J...KOOLERAIRE.htm

Out of curiosity:

Whats your estimated watt/hrs/day needs?

How many amp hrs is battery bank?

What is the dc source(s) and watts output?

I've worked on a couple of those rooftop RV units. They are 115vac, not DC or lower voltage. They are powered through the RV's electrical hookup at the camp space. Or other power supply. 12vdc is not enough to run the size compressor you would need to take care of the load on a 24' or smaller boat.
My father-in-law had a 13000 btu AC unit on his 40' tri-axle fifth wheel RV. I had helped him replace the original 11000 btu unit with that one.
He also had a battery bank and DC inverter as well as a 5000W 5.0 hp generator fueled by his onboard LP supply.
The inverter and the generator were not enough by themselves to operate the AC unit, he had to be connected to a 115 vac, minimum, supply.
I've been out fishing on headboats and they have regular AC units like those used in residential applications. I believe they are powered through an onboard generator as the units only operated when the boat was under way. If the engines were off, the AC's didn't run.

I have heard that their are some 12Vdc roof mounted units for MOTORHOMES that might adapt to your aplication...

I can't seem to find a link for you, but I think it is Coleman that makes the unit..

Try a marine a/c company.
most of the a/c i've seen on boats use ocean water to cool condensor.
you are still going to use a lot of power unless you use a rv type unit with ammonia in it.

May I assume that these are powerd boats, not sailboats. It seems to me unless you want to do some elaborate dc to ac conversion, the best would be to use an automotive compressor on the engine with matching evaporator assembly.

I havent looked lately but I think J.C Whitney still has those aftermarket a/c systems for automobiles.

Roy

It the refrigerators I have seen for trucks and solar house were 24 V.

Too many sharks!
This was not intended to be a joke.

Originally posted by coolwhip
If you get hot , go for a swim.

LMAO

If you get hot , go for a swim.

I am looking for a small manufacturer that could produce a small air conditioning system for boats under 24'. The system must meet the following criteria:

12 volt power
1,000 - 2,000 btu
Split or packaged unit
Affordable price

If any one knows of such a company please let me know. Our target is small boat owners that need air conditioning away from shore and do not wish to install a generator.