Please consider registering
guest

sp_LogInOut Log In sp_Registration Register

Register | Lost password?
Advanced Search

— Forum Scope —




— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

sp_Feed Topic RSS sp_TopicIcon
DIY Question about Marine A/C Wattage Draw & Operating on DC Inverter Power
January 22, 2012
9:33 am
Avatar
Steve Pooler
Admin
Forum Posts: 1127
Member Since:
November 12, 2008
sp_UserOfflineSmall Offline

Thanks for the post David~

And you are correct…It takes a lot of power to run A/C off batteries….

 

For you or anyone else that wants to read my response to Tyler…Click on ** you don't have permission to see this link ** 

 

Steve~ 

January 22, 2012
8:48 am
davidwigler
Knoxville, TN
Member
Members
Forum Posts: 17
Member Since:
September 6, 2011
sp_UserOfflineSmall Offline

Not enough information to respond about the 8k being sufficient, but I have tried running a 16k unit on a Xantrex 3012 inverter with 720 amp/hr battery bank.  It ran, but the amperage draw is so high it is not worth it.  Battery capacity is measured at a 20 hour discharge rate, or roughly 36 amps for that size bank.  The 16k unit draws something like 150 amps (12 volts), at which rate the battery capacity is much less.  You might get 30-60  minutes out of a large battery bank before reaching the 50% discharge point, followed by literally hours of charging.  Then there is the heat created in the batteries and inverter.  I tried it once and gave up on the idea.

1977 Hatteras 58' Motoryacht, galley up model with 4 staterooms

5 reverse cycle Cruisair compressors in the starboard engine room with SMXII controllers.  One self contained unit for the enclosed aft deck.  Total 87K btu

December 9, 2011
7:21 pm
Avatar
Steve Pooler
Admin
Forum Posts: 1127
Member Since:
November 12, 2008
sp_UserOfflineSmall Offline

Tyler was inquiring about a DIY job installing Marine A/C on a 30 foot sailboat, and then running the Marine Air Conditioner on an inverter when he was away from shore power.
His question asked about wattage draw of a 8,000 BTU Cruisair self contained Turbo AC unit & if I thought the 8,000 BTU marine ac unit would be large enough for his 30' Irwin