How level do batteries need to be? - 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? 
  #1  
Old 08-18-2009
L124C's Avatar
Senior Member
 
Join Date: Oct 2007
Posts: 1,388
Thanks: 48
Thanked 3 Times in 3 Posts
Rep Power: 8
L124C is on a distinguished road
How level do batteries need to be?

My batteries are in a tight space, and I have never liked the way the PO had them mounted. I can mount them more securely and add a spill tray, but they will have to sit at angle. On a Starboard tack, they will probably be over 45 degrees at times. Obviously, all sail boat batteries "heel", but I'm wondering what the limits are.
Attached Thumbnails
How level do batteries need to be?-0817092001.jpg  
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 08-18-2009
Senior Member
 
Join Date: Jul 2001
Posts: 1,174
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 14
k1vsk will become famous soon enough
Hard to tell but it appears these are sealed batteries. As long as the plates stay wet and the batteries stay put, electrons don't care about gravity.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 08-18-2009
JohnRPollard's Avatar
Moderator
 
Join Date: Mar 2007
Location: Chesapeake
Posts: 5,680
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 10
JohnRPollard is a jewel in the rough JohnRPollard is a jewel in the rough JohnRPollard is a jewel in the rough
Quote:
Originally Posted by L124C View Post
My batteries are in a tight space, and I have never liked the way the PO had them mounted. I can mount them more securely and add a spill tray, but they will have to sit at angle. On a Starboard tack, they will probably be over 45 degrees at times. Obviously, all sail boat batteries "heel", but I'm wondering what the limits are.
My understanding is that wet cell batteries experience significantly diminished performance when installed or operated at high angles.

This is one of the often overlooked benefits of AGM batteries over traditional wet cells. They can be installed on their sides and operated at any angle (except fully inverted) without significant loss of performance. Yet another reason they are recommended for sailboats which can spend long stretches heeled over.

Since you mention "spill trays" it sounds like you have wet cells. Maybe AGMs are in your future?
__________________

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

Pacific Seacraft Crealock 31 #62

NEVER CALLS CRUISINGDAD BACK....CAN"T TAKE THE ACCENT
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 08-18-2009
hellosailor's Avatar
Senior Member
 
Join Date: Apr 2006
Posts: 10,896
Thanks: 2
Thanked 103 Times in 100 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Sealed or not, if they are wet cells ideally you want the plates to remain fully submerged in electrolyte all the time. How far you can heel and still do that, depends on how much electrolyte they were designed to be filled with. (Which is one reason to keep them topped up.)

With AGM or gel batteries, there's no slosh so heeling isn't a factor. With wet cells, you just have to do the best you can. Try to do your installation as level as you can, plates which are not submerged will take uneven wear and age unevenly.

Instead of adding in a solid spill tray, maybe you can add a liner to the compartment, made up from shower pan or roofing membrane generously gathered under/around them, with some baking soda in the bottom as an acid absorbent?
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 09-13-2009
roline's Avatar
Cal 9.2 SilverSwan
 
Join Date: Jul 2000
Location: East Tennessee
Posts: 272
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 15
roline is on a distinguished road
Wet cells just need to keep the plates fully submerged to keep from damaging them. That said it also helps if the electrolyte can not escape from the battery to keep the electrolyte at a known level. The level would have to low enough not to spill at the angle of heel but to also not expose the plates. Maintenance would be most important to keep them at the proper level.
I had a wet cell in my 525 but experienced a few knock downs of almost putting the spreaders in the water. I did loose electrolyte and it was not fully contained in the battery box. A little acid neutralization project was taken to be sure of no residual acid anywhere.
I changed over to a AGM. I did not see any other option.
__________________
Cal 9.2 #19 SilverSwan
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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

 
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
Paralleling Batteries dave.verry Gear & Maintenance 79 11-27-2006 12:19 PM


All times are GMT -4. The time now is 03:33 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.