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Old 20-06-2023, 05:16   #16
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Re: Cycle chart for West Marine AGMS?

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Originally Posted by s/v Jedi View Post
Cycle between 50% and 100%.

Yes there are better choices for house batteries. For AGM, Lifeline would be the prima candidate (they invented it). For Gel, Sonnenschein is the top performer (they invented it). But all those are blown away by LiFePO4.

For start batteries I keep it at AGM, with the Odyssey TPPL range being the ultimate and one of the few with milspec ratings and being used by coastguards and even armored vehicles etc.

Unless something has changed, the East Penn made gel batteries license the tech from Sonnenschein, so they're also very good. And that includes the West Marine branded gels.



Lifeline certainly makes great AGMs. I'm not sure how good Trojan's AGMs are, but they're a generally good battery builder. Same for US Battery. Rolls AGMs are built by Fullriver and are good (as are the Fullriver branded equivalents, just a matter of red vs blue case).
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Old 20-06-2023, 05:40   #17
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Re: Cycle chart for West Marine AGMS?

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Originally Posted by rslifkin View Post
Unless something has changed, the East Penn made gel batteries license the tech from Sonnenschein, so they're also very good. And that includes the West Marine branded gels.

Lifeline certainly makes great AGMs. I'm not sure how good Trojan's AGMs are, but they're a generally good battery builder. Same for US Battery. Rolls AGMs are built by Fullriver and are good (as are the Fullriver branded equivalents, just a matter of red vs blue case).
Exide has acquired Sonnenschein and is now selling the products. The A600 line is premium, nothing comes close.
https://www.exidegroup.com/eu/en/pro...ein-a600-solar

I think all the brands you listed are good; I just mentioned the top choices for each category
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Old 20-06-2023, 05:47   #18
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Re: Cycle chart for West Marine AGMS?

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AGMs are not great house batteries and you are paying for a design you probably can't use like fast charging and discharging.

Thicker plate batteries for deep cycling will last longer, at a price. I have an AGM for engine start, but won't use them for the domestic batteries. Zac already has them and is likely a low power user, so perhaps not so critical. However, on a 35ft Jenny with lots of electronics you might benefit from choosing another type, like flooded lead acid.

Pete
Good AGMs come in both deep cycle and starting versions. The deep cycle versions are the best of any LA for a house bank other than for their higher cost. Like any LA they do not like to sit at a partial SOC which will shorten their life. Getting them to 100% at least weekly is good. Discharge to less than 50% occasionally will not kill them. Self discharge is very low and they can sit for months with no bad effects. They will also have less voltage drop under higher loads compared to FLA. 13 years and still going strong!
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