60 Amp alternator and 3 Odyssey Batteries - SailNet Community
LinkBack Thread Tools
post #1 of 3 Old 05-07-2009 Thread Starter
Senior Member
ArgleBargle's Avatar
Join Date: Jan 2007
Location: Victoria, B.C.
Posts: 179
Thanks: 5
Thanked 1 Time in 1 Post
Rep Power: 14
60 Amp alternator and 3 Odyssey Batteries

Do you think 3 Odyssey 31M-PC2150 100 Ah (nominal 20h d/c) batteries in parallel (which i desire mostly for their cycles at 80% DOD rather than their current acceptance) would be well matched to a 60 A alternator or do you think it would seriously reduce the alternator lifespan?
ArgleBargle is offline  
Sponsored Links
post #2 of 3 Old 05-07-2009
Senior Member
Join Date: Jul 2008
Location: chesapeake bay
Posts: 1,942
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
you should be fine as long as the alt has good cooling. the standard number is 25 % of your bank, which would be 75 amps. if you run you batteries down to 50 % or 150 amps, it would take 2.5 hours to fully recharge if it was a perfect system. but do to reasons of the way batteries charge it might take 5 hours to fully charge. figure in 2 hours you could put in about a 100 amps ( if alt cooling up to par ) which is close to the real normal range of 70 to 80 %.

so yes it should be okay if you have good alt cooling, maybe even a vent tube going to the alt
scottyt is offline  
post #3 of 3 Old 05-07-2009
Telstar 28
sailingdog's Avatar
Join Date: Mar 2006
Location: New England
Posts: 43,289
Thanks: 0
Thanked 20 Times in 15 Posts
Rep Power: 18

The Odyssey batteries are AGM batteries using TPPL technology IIRC. They have a very, very high current acceptance rate...and three 100 AH ones could probably be charged at 200 amps to begin with and be perfectly fine. The 25% rule does not apply to them.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

sailingdog is offline  

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:


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Changing amp meter from a 40-40 range to a 60-60 range roduhu Electrical Systems 7 05-09-2017 01:36 PM
Northstar vs. Odyssey TPPL AGM Batteries ahalfon Electrical Systems 2 04-24-2015 08:41 PM
Hitachi 35 amp Alternator OK for new batteries? HUGOSALT Electrical Systems 6 06-06-2014 08:27 AM
alternator charding Odyssey TPPL batteries ArgleBargle Gear & Maintenance 2 02-28-2010 09:43 PM
Alternator and Batteries NewsReader Mass Bay Sailors 2 06-27-2006 07:09 AM

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