[RE-wrenches] LI Battery For Stand Alone?

[James Jarvis]

80% DOD on an AGM battery is pretty aggressive and won't lead to very long
battery life. Is that your normal design intended depth of discharge or
that just where you the LVDs set to cut out?

You mention cold. And you are talking about 250 amp/hour and a genasun
controller. So a pretty small system. Unless you are planning on somehow
climate controlling the battery bank, I think for all practical purposes
lithium batteries aren't going to work because they generally aren't rated
to charge in the cold.

I always try to massively oversize my battery banks. The only complaint is
the cost. Limited charging rate has sulfating and other chronic
undercharging concerns. But I find that in (my) real world the customer is
generally happy that their loads stayed on and it tempers the cost of a
battery replacement down the road.

-James Jefferson Jarvis
APRS World, LLC
+1-507-454-2727
http://www.aprsworld.com/


On Tue, Dec 31, 2024 at 10:27 AM Mark Frye via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Folks,
>
>
>
> I have spec’d the Morningstar Genstar for my stand alone power supply.
>
>
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> The application is in harsh desert environments so low and high
> temperatures.
>
>
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> I need very high reliability.
>
>
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> I am currently spec’ing 250 AH of AGM at 48V, with 80% allowed DOD.
>
>
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> Before I pull the trigger on this, I am wondering if LiPo has come far
> enough in terms of simplicity and reliability.
>
>
>
> Are folks now using LiPo successfully in this type of application?
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>
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> If so,  which products?
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> Thanks,
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>
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> Mark Frye
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>
>
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