Battery water level - 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
 Not a Member? 


Like Tree3Likes
Reply
 
LinkBack Thread Tools
  #1  
Old 10-07-2012
Member
 
Join Date: Jun 2008
Posts: 43
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
edwmama is on a distinguished road
Question Battery water level

Hello fellow sailors


Can anyone tell me or educate me on this issue that baffles the heck outa me?

Besides my separate starter batteries I have two sets of house battery. One set consists of two 4D connected in parallel. Another set contains four 6V batteries in which 2 pairs are in a series which In turn are in a parallel connection. My question is. Why is it then when I go to top off the water the 4D never require water but the 6 V always do even though the 4D are my primary bats? I am using the 4D and they are always full and the 6V are back ups yet they are always low every two months? Mysterious


Edwin
Lahlia
Cal Cruising 46
Marina del Rey CA
Reply With Quote Share with Facebook
  #2  
Old 10-07-2012
Senior Member
 
Join Date: Jan 2009
Location: Deer Harbor, Washington
Posts: 210
Thanks: 0
Thanked 8 Times in 8 Posts
Rep Power: 6
mitchbrown is on a distinguished road
Re: Battery water level

Ed

asuming the batteries are still good then the problem is over charging, the charge voltage is set to hi for the batteries or yoiur 3 stage charger wont idle down to a float charge. It's more likley that the batteries are goiing bad and the battery voltage is low as a result. this would cause the charger to think they are low and continually try to charge at bulk charge voltage, which would boil the water out
Brewgyver likes this.
Reply With Quote Share with Facebook
  #3  
Old 10-07-2012
Member
 
Join Date: Feb 2007
Location: aboard, Malaysia
Posts: 73
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
klubko is on a distinguished road
Re: Battery water level

As mitchbrown says. My guess is that both sets of your house batteries are charged together. Being of different make and likely also different age, they might need slightly different charging parameters.
__________________
Petr & Jana
s/y Janna, HR 31 Monsun

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #4  
Old 10-14-2012
Member
 
Join Date: Jun 2008
Posts: 43
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
edwmama is on a distinguished road
Angry Re: Battery water level

Quote:
Originally Posted by mitchbrown View Post
Ed

asuming the batteries are still good then the problem is over charging, the charge voltage is set to hi for the batteries or yoiur 3 stage charger wont idle down to a float charge. It's more likley that the batteries are goiing bad and the battery voltage is low as a result. this would cause the charger to think they are low and continually try to charge at bulk charge voltage, which would boil the water out

I noticed that my gauge reads 13.4 at float charge
Shouldn't it be like 12.6?

Is that then an indication of over charging?

I have a xantrex MS 3000 with a combiner for 3 battery banks

What should I do?
Reply With Quote Share with Facebook
  #5  
Old 10-15-2012
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 2,162
Thanks: 1
Thanked 33 Times in 33 Posts
Rep Power: 4
MarkSF is on a distinguished road
Re: Battery water level

I just googled it for you, and 13.4v is the ideal float voltage for lead acid batteries.
__________________
1984 Bristol 31.1
Alameda, California, USA
Reply With Quote Share with Facebook
  #6  
Old 10-15-2012
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,049
Thanks: 0
Thanked 67 Times in 58 Posts
Rep Power: 7
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Battery water level

Quote:
Originally Posted by edwmama View Post
I noticed that my gauge reads 13.4 at float charge
Shouldn't it be like 12.6?

Is that then an indication of over charging?

I have a xantrex MS 3000 with a combiner for 3 battery banks

What should I do?
For flooded batteries the MS 3000 has a bulk/absorption voltage of 14.4 and a float voltage of 13.5.

12.6 or higher is the voltage of a fully charged battery when resting without a float voltage present.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Share with Facebook
  #7  
Old 10-15-2012
Member
 
Join Date: Jun 2008
Posts: 43
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
edwmama is on a distinguished road
Re: Battery water level

Thx mark sf and the gang

I guess maybe next time I will just have
Two sets of 4 D bats in both banks



Edwin
Cal Cruising 46
Marina del Rey CA
Reply With Quote Share with Facebook
  #8  
Old 10-15-2012
Senior Member
 
Join Date: Feb 2011
Location: San Francisco Bay area
Posts: 2,162
Thanks: 1
Thanked 33 Times in 33 Posts
Rep Power: 4
MarkSF is on a distinguished road
Re: Battery water level

I think what is happening is that the two banks are charged together at the same rate. Therefore, the bank that was not discharged, by being used, will get warmer and use electrolyte at a higher rate - this is inevitable.

I have a simple two bank system with 1/2/both/off switch. I always alternate which bank is used for a daysail, according to the date. Even days - bank 2, odd days bank 1. This is partly to even out the use and the electrolyte consumption.

It's hard to come up with too much of a suggestion because you haven't explained your charging arrangement, which is obviously somewhat fundamental to understanding the problem.
__________________
1984 Bristol 31.1
Alameda, California, USA
Reply With Quote Share with Facebook
  #9  
Old 10-15-2012
chef2sail's Avatar
Senior Member
 
Join Date: Nov 2007
Location: Maryland
Posts: 6,878
Thanks: 29
Thanked 54 Times in 50 Posts
Rep Power: 7
chef2sail will become famous soon enough
Send a message via AIM to chef2sail
Re: Battery water level

Simpler next time to give yourself one large house bank and a separate start bank. You won't have to do all that switching , marking and remembering.
mitiempo likes this.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
___________________________
S/V Haleakala (Hawaiian for" House of the Sun")
C&C 35 MKIII Hull # 76
Parkville, Maryland
(photos by Joe McCary)
Charter member of the Chesapeake Lion posse

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


“Sailing is just the bottom line, like adding up the score in bridge. My real interest is in the tremendous game of life.”- Dennis Conner
Reply With Quote Share with Facebook
  #10  
Old 10-15-2012
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,049
Thanks: 0
Thanked 67 Times in 58 Posts
Rep Power: 7
mitiempo will become famous soon enough mitiempo will become famous soon enough
Re: Battery water level

Quote:
Originally Posted by chef2sail View Post
Simpler next time to give yourself one large house bank and a separate start bank. You won't have to do all that switching , marking and remembering.
It is more efficient and your batteries will, due to shallower cycling, last longer.
__________________
Brian
Living aboard in Victoria Harbour
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
Water Miser Battery Caps mikeedmo Gear & Maintenance 1 08-08-2013 04:02 PM
Oil level in Yanmar 2GM L124C Gear & Maintenance 22 04-20-2009 09:43 AM
Water Miser Battery Caps mikeedmo Gear & Maintenance 2 09-21-2006 05:56 AM
Battery Charge Level danapsy Gear & Maintenance 5 03-16-2006 10:48 AM
Sea Level Visibility Dan Dickison Cruising Articles 0 08-02-2002 08:00 PM


All times are GMT -4. The time now is 06:17 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.