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Old 07-21-2015, 02:21 PM   #1
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Which 8D AGM? Lifeline, Trojan, Haze, ...?

It is time to replace my house bank, two 8D Lifeline AGM's.

Installed 2003, twelve years of service is pretty good, and I could replace with the same Lifeline GPL-8DL's. But they are kind of difficult to source here in western Canada, and so I've been looking at alternatives.

The Trojan 8D-AGM and the Haze HZB12-230 are available (and cheaper than Lifeline) but reviews are scarce.

Anybody out there in trawlerland have experience with those?

Thanks in advance...
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Old 07-21-2015, 02:24 PM   #2
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Consider instead: Rolls, which happens to be a Canadian product and top flight quality.
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Old 07-21-2015, 04:13 PM   #3
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I just bought three Deka 8D AGM's for $440 each plus tax here in Florida. The old ones were 8 year old Dekas.

I have had Lifelines and got about 8 years out of them too but quite a bit more expensive in my area.
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Old 07-21-2015, 04:32 PM   #4
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Consider instead: Rolls, which happens to be a Canadian product and top flight quality.
George, thanks! I didn't want flooded and I didn't know Rolls Surrette did an 8D AGM, but they do and it looks very good on specs, warranty, and price.
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Old 07-21-2015, 05:02 PM   #5
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The big advantage of AGM is their ability to accept a HUGE charge rate, IF you can provide it.

How do they get filled?
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Old 07-21-2015, 05:09 PM   #6
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It is time to replace my house bank, two 8D Lifeline AGM's.

You might investigate 6 golf cart batteries. IIRC, that's the number that will fit in the same space as two 8Ds... and you'd end up with more amp-hours (around 660). Easier to shuffle each individual battery, and they're plates are apparently better designed for deep cycling.

Lifeline makes AGM versions, probably others do too.

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Old 07-21-2015, 06:38 PM   #7
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You might investigate 6 golf cart batteries. IIRC, that's the number that will fit in the same space as two 8Ds... and you'd end up with more amp-hours (around 660). Easier to shuffle each individual battery, and they're plates are apparently better designed for deep cycling.

Lifeline makes AGM versions, probably others do too.

-Chris
3 6 volt GC2's put in sideways are about an inch longer than an 8D, in reality a bit more than that. They're also 2" or 25% taller , which is another place the extra capacity comes from and the increase in overall weight. A Rolls or Lifeline AGM will have same deep cycle characteristic be it a GC2 or 8D. If you got the space and the money, (including the extensive re-cabling required) the 6 GC's are a great alternative.
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Old 07-21-2015, 07:04 PM   #8
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Yup. I replaced 2 8Ds (450 AH bank) with 6 GCs (660 AH bank). That's a 47% increase from the same battery boxes. IIRC, my height difference was about an inch. It did require some recabling, but I was replacing the big cables at the same time anyways.

It was one of the best electrical improvements I made on my boat.
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Old 07-21-2015, 07:41 PM   #9
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I use Deka's. If you go with them, do a search for a local Deka distributor. buy it directly from them. Once the anchor photo goes on it at a marine supply store the price goes up 50%
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Old 07-21-2015, 08:20 PM   #10
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Lifeline makes AGM versions, probably others do too.
I just added 4-6 volt AGM batts for my bow thruster. (24 volt system)
They are "Full Rivers" and are highly touted in my area.
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Old 07-21-2015, 11:04 PM   #11
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The big advantage of AGM is their ability to accept a HUGE charge rate, IF you can provide it. How do they get filled?
I'm not particularly taking advantage of that. 75A shore power charger, 130A alternator when underway but with a dumb regulator, 400W solar on the hook.

But 8D AGM's are what's there now, they've been working very well, and with all the other stuff I've got going on I really don't need an electrical project too. So two new of the same, drop them in, done.

And they do have a few other advantages over flooded lead-acid...
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Old 07-22-2015, 05:53 AM   #12
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"130A alternator when underway but with a dumb regulator,"

That is an easy cure.Not more than 30 min if the existing regulator is external.

And you spend enough time away from the dock to enjoy it.
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