We also have 32000 btu's on a 51 ft
boat. Most of the time ,even at a
dock we only use about 21000 by only
cooling the master, and saloon/galley, and pilot house if needed. no sence
cooling places we don't sleep in or use much! we have so little other 110 on board besides AC, that a 30 amp
service covers our useage at dockside !So we are lucky! At sea our 7.5 genny handles all the
power needed for all our 110
equipment. Personaly we look for AC before we even look at anything else on a
boat add ! But we live on the
gulf coast and need ac 7 months of the year!! And of course we are OLD and like to sleep cool !!