Overcharging Battery - 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 > Contributing Authors > Gear and Maintenance Articles
 Not a Member? 


Closed Thread
 
LinkBack Thread Tools
  #1  
Old 09-21-2000
Contributing Authors
 
Join Date: Jan 2000
Posts: 266
Thanks: 0
Thanked 10 Times in 7 Posts
Rep Power: 15
Tom Wood is on a distinguished road
Overcharging Battery

Whenever my boat is docked for about a week with the battery charger plugged into shore power, one of the two batteries will systematically dry up, forcing me to add more distilled water. What could be causing this?

Tom Wood responds:

I would first suspect the charger. A small voltmeter, preferably digital, should be used to test the voltage output of the charger at the battery terminals—it should read between 14.1 and 14.3 for wet cells in the first, bulk-charging phase. This test can only be accomplished if the batteries are used (without charging) for a short time. The measurement is then taken over the first 10 or 15 minutes that the charger is turned back on. This voltage should step down to a float charge of about 13 volts when the charging cycle is near the end. If the voltage is too high, or does not taper down, you have an overcharging problem.

The second place I would look is the battery. It may be damaged or defective, and this may only be apparent with a load test at a battery dealer. If the charger is working OK, but the battery has a shorted cell or other internal resistance, the charger energy is simply blown off.

Quick reply to this message
Closed Thread

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



All times are GMT -4. The time now is 04:47 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.