How to use marine battery posts? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
 Not a Member? 


Like Tree2Likes
  • 2 Post By mitiempo
Reply
 
LinkBack Thread Tools
  #1  
Old 07-04-2013
Learning to sail
 
Join Date: Aug 2010
Location: San Francisco Bay Area
Posts: 113
Thanks: 1
Thanked 2 Times in 2 Posts
Rep Power: 5
aaronwindward is on a distinguished road
How to use marine battery posts?

My boat came with all wiring only connected to the threaded terminals; nothing connected to the lead automotive-style tapered SAE posts. Everything that wired direct to the battery stacked on the threads.

Is there anything in particular that the big lead terminals should be used for? Or should I just keep them covered and ignore them?

I've bought new batteries and I'm redoing some of the wiring, and adding a permanently wired AC charger. There is no starter motor or anything; all of the loads are electronics, which the biggest being the inverter or the autopilot, and of course the charger itself.
Reply With Quote Share with Facebook
  #2  
Old 07-04-2013
Classic30's Avatar
Once known as Hartley18
 
Join Date: Aug 2007
Location: Melbourne, Australia
Posts: 4,526
Thanks: 28
Thanked 42 Times in 42 Posts
Rep Power: 9
Classic30 will become famous soon enough Classic30 will become famous soon enough
Re: How to use marine battery posts?

Quote:
Originally Posted by aaronwindward View Post
Is there anything in particular that the big lead terminals should be used for? Or should I just keep them covered and ignore them?
A good question.

They are there as an alternative to the threaded terminals, so in your case, just cap them off and ignore tham. It's important to cap them or cover them in some way, especially the red (+) because if anything heavy and metallic falls across them whilst out sailing nasty things could happen..
__________________
-
"Honestly, I don't know why seamen persist in getting wrecked in some of the outlandish places they do, when they can do it in a nice place like Fiji." -- John Caldwell, "Desperate Voyage"

Last edited by Classic30; 07-04-2013 at 03:11 AM.
Reply With Quote Share with Facebook
  #3  
Old 07-04-2013
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,116
Thanks: 0
Thanked 71 Times in 62 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: How to use marine battery posts?

I agree, cap them and ignore. But there should not be multiple connections stacked on the studs of the battery. Invest in a few busbars and then you can have less connections on the battery. Ideally there should be only one positive and one negative on a battery, excepting temp sensors and any parallel/series wiring.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Share with Facebook
  #4  
Old 07-04-2013
Classic30's Avatar
Once known as Hartley18
 
Join Date: Aug 2007
Location: Melbourne, Australia
Posts: 4,526
Thanks: 28
Thanked 42 Times in 42 Posts
Rep Power: 9
Classic30 will become famous soon enough Classic30 will become famous soon enough
Re: How to use marine battery posts?

Quote:
Originally Posted by mitiempo View Post
......
Ideally there should be only one positive and one negative on a battery, excepting temp sensors and any parallel/series wiring.
..and charging circuits and voltage monitoring and...
__________________
-
"Honestly, I don't know why seamen persist in getting wrecked in some of the outlandish places they do, when they can do it in a nice place like Fiji." -- John Caldwell, "Desperate Voyage"
Reply With Quote Share with Facebook
  #5  
Old 07-04-2013
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,116
Thanks: 0
Thanked 71 Times in 62 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: How to use marine battery posts?

Quote:
Originally Posted by Hartley18 View Post
..and charging circuits and voltage monitoring and...
Can all be done from the bus a few inches away. One of the last larger banks I installed was composed of 8 golf carts in series/parallel - 960 AH. Except for the series/parallel wiring there was one positive and one negative out to their respective buses or fuses and one temp sensor.
Classic30 and chef2sail like this.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Share with Facebook
  #6  
Old 07-05-2013
Learning to sail
 
Join Date: Aug 2010
Location: San Francisco Bay Area
Posts: 113
Thanks: 1
Thanked 2 Times in 2 Posts
Rep Power: 5
aaronwindward is on a distinguished road
Re: How to use marine battery posts?

Would there be any value in putting charging on the SAE posts? It's pretty much the highest current load I currently have, at 40A; it's also 'special' in that it doesn't go through the main bus, but directly through a 50A fuse to the charger (so the wire run has as little drop as possible).
Reply With Quote Share with Facebook
  #7  
Old 07-05-2013
Maine Sail's Avatar
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,352
Thanks: 11
Thanked 121 Times in 89 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Re: How to use marine battery posts?

Quote:
Originally Posted by mitiempo View Post
Can all be done from the bus a few inches away. One of the last larger banks I installed was composed of 8 golf carts in series/parallel - 960 AH. Except for the series/parallel wiring there was one positive and one negative out to their respective buses or fuses and one temp sensor.
Amen! These are what most of my installs typically look like.



In this situation I used the "auto" post for the MRBF fuse and main + feed to the vessel. The marine post was used for the parallel connections.










During the mock up stage of the battery box:




I am usually starting with something like this:
__________________
______
-Maine Sail / CS-36T


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




© Images In Posts Property of Compass Marine Inc.


Reply With Quote Share with Facebook
  #8  
Old 07-07-2013
Classic30's Avatar
Once known as Hartley18
 
Join Date: Aug 2007
Location: Melbourne, Australia
Posts: 4,526
Thanks: 28
Thanked 42 Times in 42 Posts
Rep Power: 9
Classic30 will become famous soon enough Classic30 will become famous soon enough
Re: How to use marine battery posts?

Quote:
Originally Posted by aaronwindward View Post
Would there be any value in putting charging on the SAE posts? It's pretty much the highest current load I currently have, at 40A; it's also 'special' in that it doesn't go through the main bus, but directly through a 50A fuse to the charger (so the wire run has as little drop as possible).
No. Actually the highest current load is usually either engine starting or anchor winch load (don't know if you have either).

Having the charger connected to the main battery bus, with everything else, makes it easier to work out your cable connections and means you don't need a second battery protection fuse..
__________________
-
"Honestly, I don't know why seamen persist in getting wrecked in some of the outlandish places they do, when they can do it in a nice place like Fiji." -- John Caldwell, "Desperate Voyage"
Reply With Quote Share with Facebook
  #9  
Old 07-21-2013
Senior Member
 
Join Date: Jul 2007
Posts: 401
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 8
CapnRon47 is on a distinguished road
Re: How to use marine battery posts?

And as you can see from Maine Sails pictures you should NOT use the wing nuts that sometimes come with the secondary battery connections. I was dinged by my insurance survey for having wing nuts and was recommended to replace them with locking nuts.

Ron
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
marine battery and a good charger jhgreen Gear & Maintenance 2 08-18-2012 09:40 AM
favourite marine battery floridajaxsailor Gear & Maintenance 39 04-29-2012 10:37 PM
Marine battery group size whats the difference??? saurav16 Gear & Maintenance 17 08-29-2009 05:17 PM
Marine Battery Weigh in saurav16 Gear & Maintenance 11 07-31-2009 08:07 AM
Marine Battery Ratings Ralph Doolin Gear and Maintenance Articles 0 01-15-2002 07:00 PM


All times are GMT -4. The time now is 01:45 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.