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hanschristian.org • View topic - AGM Batteries

AGM Batteries

Moderators: warmrain, mimoza

AGM Batteries

Postby sv_bruadair » Thu Nov 02, 2006 4:43 pm

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Postby sv_bruadair » Thu Nov 02, 2006 5:56 pm

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Postby steven_cleary » Thu Nov 02, 2006 9:27 pm

Damon,

I'm in the planning process for replacing all of my batteries aboard. You seem very well informed in all areas you comment on. I don't know your background, and please don't be offended, but I thought it worthwhile to ask what type of charger you have, what type of regulator on your alternator, and any "alternative" energy devices you have feeding your batteries?

AGM's are very sensitive to the proper charging voltages. In my case, the previous owner installed a high quality ferro resonant charger that is not suited to AGM's. My batteries are 5 yrs old and absolute junk. Before I replace them, i'm redoing the entire charging system. The result of incorrect charging is that they are always under charged and hence sulfated. Ferro resonant chargers (at least the one on my boat) cut in at 12.8 volts and cut out at 13.9v.

Everything I've read says the lifelines are great batteries and should last for 10-15 years if properly charged. Is it possible your alternator and/or charger is not calibrated correctly and created your battery situation?

For the benefit of those considering AGM batteries, the proper voltage for AGM charging is as follows:

Bulk 14.1->14.4
Absorption 14.1 ->14.2
Float 13.1 ->13.3

I'd like to know what you have for a charger/alternator setup so I can avoid the $2000 investment I'm about to make in lifeline batteries if you've got the right gear and the battieries still fail early.
Thanks,

Steve Cleary
1998 HC 48T
Hull #26
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Postby steven_cleary » Fri Nov 03, 2006 12:08 am

Some additional info from the lifeline website regarding care/feeding of the batteries:

http://www.lifelinebatteries.com/manual2.php

In terms of them not responding to emails, give andrew a shot, he's been very helpful when I've inquired. andrew@lifelinebatteries.com
Thanks,

Steve Cleary
1998 HC 48T
Hull #26
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Re: AGM Batteries

Postby warmrain » Fri Nov 03, 2006 1:11 am

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Built by Hansa Yacht und Schiffbau G.M.B.H. Taichung Taiwan by Herb Guttler (last Hansa hull was #131, built 1987)

Posts are my opinion based on my experience; your results may vary from mine.
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Postby sv_bruadair » Fri Nov 03, 2006 8:18 pm

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Postby sv_bruadair » Fri Nov 03, 2006 8:25 pm

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Postby sv_bruadair » Fri Nov 03, 2006 8:41 pm

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Postby warmrain » Fri Nov 03, 2006 8:54 pm

Yacht "Warmrain" 1986 HC33T #123
Built by Hansa Yacht und Schiffbau G.M.B.H. Taichung Taiwan by Herb Guttler (last Hansa hull was #131, built 1987)

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Postby sv_bruadair » Fri Nov 03, 2006 10:57 pm

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Postby sv_bruadair » Fri Nov 03, 2006 11:00 pm

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Postby steven_cleary » Fri Nov 03, 2006 11:52 pm

Thanks,

Steve Cleary
1998 HC 48T
Hull #26
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Postby warmrain » Sat Nov 04, 2006 12:55 am

Yacht "Warmrain" 1986 HC33T #123
Built by Hansa Yacht und Schiffbau G.M.B.H. Taichung Taiwan by Herb Guttler (last Hansa hull was #131, built 1987)

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Postby mike » Sun Nov 05, 2006 2:02 pm

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Postby mike » Sun Nov 05, 2006 2:06 pm

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