Air Cond. and alternators &batteries - SailNet Community
LinkBack Thread Tools
post #1 of 2 Old 03-20-2002 Thread Starter
Junior Member
Join Date: Feb 2002
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Air Cond. and alternators &batteries

Like to hear from someone who has been there and done that. Have airconditioning but no genset. If I put on a large inverter can I run rhe Air off of the alternaor while running the engine and or off the house batteries? I understand that I can eat up a lot of amps in a hurry but even a couple of hours of Air in the Bahamas at dusk in the summer would be a big help. Air draws about 6 amps. 500 amp hours of Trojans for house batteries and a wind generator with 42 inch diameter blades.
larrythompson is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 2 Old 05-03-2002
Senior Member
Join Date: Sep 2001
Posts: 138
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 16
Air Cond. and alternators &batteries

Probably yes. Keep in mind that a 6 amp I am assuming is at 115 volts so it would be around 75 amps at your boats voltage. The problem with an inverter is not running the appliance but starting it. It will only be using around 900 watts, but to start such a load will take a much larger inverter. I don not believe a 1500 would do it I think you would need at least a 3000 watt inverter and that might not be enough. I would ask that your dealer let you take it and see if it will start the load before you purchase it. Now if you are drawing around 75 amps you also have the inefficacy''s of the chargers the inverter and the storage of the batts to contend with. So your actual consumption will be more likely to be 90 amps. This means without running the engine you would deplete your battery bank to the 50% mark in 2.5 hours. If you have an alternator that will produce 100 amps or more it might keep up or at least come real close. if it is 50 amps that you could go approximately 5 hours before you would have to shut down your AC for at least 6 hour to recharge.
obiec is offline  
Quote Quick Reply Share with Facebook

Quick Reply

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome