DC Air Conditioning

DC Air Conditioning is a great asset for boats that don’t have a supply of AC power, either from the dock or generator. Boats that do not have AC power and have DC electrics only can still enjoy the benefits of air Conditioning with a small DC air Conditioning unit. DC air conditioning can be powered by a conventional 12 or 24 VDC electrical system. The DC electrical system must have however, a large battery bank with the appropriate charging capabilities.

Charging of the VDC system can be via; Shore Power connection, small Generator like the Honda 1001, Main engine Alternator, or Wind or Solar.

A 12 volt 5000 BTU unit will draw about 30 amps DC (12 volt). If you don’t have adequate battery or charging you may get buy with just using the Air Con for periods as DC air conditioning systems don’t have the large startup surges that 110V AC have.

DC Air Conditioning

Pros No AC power needed Quiet, no generator needed Low start up power requirement

Cons; Large Battery Bank required Cost of air con plus charging systems Unless you have ample batteries or charging systems you won’t be able to run air conditioning all night especially if you have refrigeration and other battery taxing loads.

Air Conditioner sizing

Rule of thumb; 15-18 BTU for every cubic foot of cabin space

M5 5200 BTU DC air conditioner

Manufactures description

With a cooling capacity of 450 cubic feet, this unit is designed to cool/heat up to a 26′ cruiser or a 28′ sailboat.

Our 5,200 BTU marine air conditioner has the smallest footprint on the market and only weighs 31.5 pounds. It is the ultimate in climate control. Don’t mistake that compact size for impaired function, however. Our unit packs the perfect punch of cool, comfortable air to keep your cabin temperate. Thanks to the expertise of our engineering and manufacturing team, even the electrical box on this unit only weighs 4.7 pounds. Stop struggling with unwieldy air conditioning units on your boat or camper!

Our 5,200 BTU marine air conditioner also has rotatable blowers and tapers into a V shape to make odd angle discharge installations a breeze. We use 4″ ducting and recommend a minimum of 2, 4″ round supply grills with this installation. This unit will run off of the new Honda EO1000i 1,000 watt portable generator while in cool mode. Another option we recommend is to use a Statpower pure sine wave 1,800 watt inverter and 450 amp hours of battery power and you can anchor out for one night.

Electric heat is not an option with this unit.


DC Cuddy 12 volt Air Con