Overcharging Battery - SailNet Community
 
LinkBack Thread Tools
post #1 of 1 Old 09-21-2000 Thread Starter
Contributing Authors
 
Join Date: Jan 2000
Posts: 266
Thanks: 0
Thanked 10 Times in 7 Posts
Rep Power: 16
 
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.

Tom Wood is offline  
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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is Off
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