[RE-wrenches] AGMs - Maintenance Cycling

[James Jarvis]

The life of the batteries will be longer in that service then in a deep
cycling service.

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


On Tue, Dec 2, 2025 at 6:30 AM Mark Frye via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

>
>
> Thanks Guys,
>
>
>
> I guess I am wondering if the overall life of the battery will suffer if
> it is only ever cycled between 0 and 20% DOD and never deep cycled.
>
>
>
>
>
> *From:* RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> *On
> Behalf Of *Jay via RE-wrenches
> *Sent:* Monday, December 1, 2025 3:31 PM
> *To:* RE-wrenches <re-wrenches at lists.re-wrenches.org>
> *Cc:* Jay <jay.peltz at gmail.com>
> *Subject:* Re: [RE-wrenches] AGMs - Maintenance Cycling
>
>
>
> Agreed and especially if the batteries are in a cooler to cold environment
> even less an issue as the colder temps slows down any self discharge
>
>
>
> Jay
>
>
>
> On Dec 1, 2025, at 12:57 PM, James Jarvis via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> 
>
> Is there a specific problem you are trying to resolve? If the loads are
> shut off when in storage, I don't see any issue with not messing with any
> charging what-so-ever for some months of storage.
>
>
>
> -James Jefferson Jarvis
>
> APRS World, LLC
> +1-507-454-2727
>
> http://www.aprsworld.com/
>
>
>
>
>
> On Mon, Dec 1, 2025 at 10:47 AM Mark Frye via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> Folks,
>
>
>
> I have some AGMs that are PV charged during normal use and can be line
> charged when in storage (IOTA).
>
>
>
> The batteries will generally see 10-20% daily DOD and will generally
> complete the absorb cycle and see a fair amount of float each day.
>
>
>
> They may be deployed in this mode for many months.
>
>
>
> After that, they will go into storage for several months.
>
>
>
> Storage will include float charging at the IOTAs regular voltage.
>
>
>
> I have the LVD set at 46V.
>
>
>
> Would it make sense to occasionally turn on the load, turn off the line
> charger, let the bank run down to LVD, turn off the load, turn on the
> charger with the increased voltage jumper installed, charge overnight,
> remove jumper and resume normal float charging?
>
>
>
> Thanks,
>
>
>
> Mark
>
>
>
>
>
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