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 01-12-2021, 13:50   #1
Registered User

Join Date: Nov 2011
Location: Australia
Boat: Fontaine Pajot Salina 48
Posts: 18
AGM Battery Life

Hello

Following my previous post on voltage drop across AGM deep cycle bank whilst amp level remains high. There seems a real possibly of battery failure after 18 months of use because of heat.
Manufacturer now has new statistics on batteries which show 2 years life cycle if mounted in area >40c.
Mine are in the engine room as was the previous bank for 8 years however these new ones seem to be challenged.
So question. Does anybody have any brand reference experience of use of deep cycle AGM's mounted in engine rooms?

Thanks again for feedback
Amaranth is offline   Reply With Quote
Old 01-12-2021, 14:10   #2
Registered User
 
Beausoleil's Avatar

Join Date: Jul 2007
Location: Potomac Shores, VA USA
Boat: Formosa 51 Aft Cockpit Ketch - "Beausoleil"
Posts: 603
Images: 3
Re: AGM Battery Life

In our Formosa 51, the engine start battery (Fullriver DC200-12 AGM) and the house bank (4 x DC400-6 AGM) were both in the engine room - below the salon sole - and we never had a heat problem while cruising the southeast US coast, Bahamas and the eastern Caribbean for 5 years.

The engine room is well ventilated and rarely got above 95-100F/35-38C. The batteries lasted until about two years ago - for a total of 12 years. The key was to not discharge below 60%, and to charge them completely. A 720W solar array was the answer, as well as over-redundancy on shorepower/genset charging + high-output alternator.
__________________
Cap'n Jon (KB1HTW)
S/V Beausoleil -1979 Formosa 51 Ketch
"If it's gonna happen, it's gonna happen out there." - Captain Ron
Beausoleil is offline   Reply With Quote
Old 05-12-2021, 09:27   #3
Registered User
 
ranger58sb's Avatar

Join Date: Aug 2012
Location: Maryland, USA
Boat: 58' Sedan Bridge
Posts: 4,912
Re: AGM Battery Life

We have installed both Odyssey and Lifeline AGMs in our engine room; the Odysseys lived for 11/12 years each bank. Didn't have the boat long enough after that to evaluate the Lifelines, but I think they were on year 4 when we sold.

-Chris
__________________
Chesapeake Bay, USA.
ranger58sb is offline   Reply With Quote
Old 05-12-2021, 11:38   #4
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 9,373
Re: AGM Battery Life

Every time AGMs come up, I try to remind users of these helpful contributions from Maine Sail:


AGM Batteries - Making The Choice (from Maine Sail)

https://forums.sailboatowners.com/in...choice.124973/

AGM Battery Issues and the Blue Seas Dual Circuit Switch (from Maine Sail) "DARN AGM Batteries"
https://forums.sailboatowners.com/in...teries.133773/

Additional Observations on the Limits of AGMs http://c34.org/bbs/index.php/topic,5....html#msg63004
__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is offline   Reply With Quote
Reply

Tags
agm, battery

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
marine agm vs automotive agm Muaddib1116 Electrical: Batteries, Generators & Solar 15 27-08-2020 20:14
AC battery charger for AGM start battery and Lithium bank exMaggieDrum Electrical: Batteries, Generators & Solar 75 19-06-2018 14:35
AGM " Shelf Life " callistov42 Electrical: Batteries, Generators & Solar 2 04-04-2012 13:57
Life Expectancy Group 27 AGM Batteries Capt.Don Electrical: Batteries, Generators & Solar 4 07-01-2011 12:09
AGM Batteries and Battery Box Steve Kidson Electrical: Batteries, Generators & Solar 14 18-05-2010 06:30

Advertise Here


All times are GMT -7. The time now is 05:53.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.