Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 27-03-2018, 10:52   #1
Registered User

Join Date: Feb 2014
Location: St Augustine, FL
Boat: 1995 Privilege 51
Posts: 286
Images: 3
Time to Replace My Batteries?

We are trying to leave the dock and go to the Bahamas for a month or so.

I have 12 6-volt Trojan T-105 Lead Acid batteries. They are about 3 1/2 years old now. I've only owned the boat for the last 1 year 1/2, attached to a dock all except a 45 day trip to the Bahamas last year.

Prior to my ownership, the boat was on the hard and went threw Hurricane Matthew in a boat yard with questionable power. So the batteries have unknown abuse prior to my ownership.

I've equalized twice within the past month. Hyrdometer is coming back in the green.

My battery tests at the dock are not going well. I'm dropping to 12.5 volts within 3 hours of disconnecting shore power, with very small draws going on. My laptop is plugged in to AC, and my AC fridge kicks off every once in a while drawing 10 amps DC.

Time to replace? Anything else I can do to test? I have access to a load tester, but I'm not sure it would do much. I know these batteries are getting older, but they don't have alot of cycles on them.

Thanks,
~ FollowingCs ~
FollowingCs is offline   Reply With Quote
Old 27-03-2018, 20:40   #2
Registered User

Join Date: Jun 2013
Location: canada
Posts: 4,634
Re: Time to Replace My Batteries?

read up on 20 hour test. or c20 test. that is the best way. you'll need a way to measure amps. and enough devices to load the batteries. that size you'll probbaly need an inverter with AC loads to do a test. and it needs to be loads that don't cycle (fridges etc)

I would also recommned adding a battery monitor if you don't have one. (that will provide you the amps and volt reading for the test. and you can compare actulal AH used)

12.5v under load is a fine voltage. under the c20 test you'll probbaly sit around there for 5 + hours.
smac999 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lines - To replace, or not to replace? TooCoys General Sailing Forum 31 25-04-2017 13:32
What to replace my batteries with Sailuke Electrical: Batteries, Generators & Solar 32 08-07-2016 15:37
Need To Replace Starting Batteries On Lagoon 420 trosenthal20 Electrical: Batteries, Generators & Solar 6 04-07-2015 16:05
When Is the Right Time to Replace the Standing Rig ? Camelot Deck hardware: Rigging, Sails & Hoisting 32 06-03-2011 10:54
Replace Deka 904D Batteries w/ Same, Or . . . ? Whimsy Electrical: Batteries, Generators & Solar 11 15-08-2010 07:55

Advertise Here


All times are GMT -7. The time now is 02:39.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.