[time-nuts] Re: Backup DC power with current battery technology?

[paul swed]

John there seem to be various LI technology in Ham Radio for remote ops.
But they seem expensive from what I have looked at. Then a bit more of a
challenge stacking batteries for 24 V.
Possiblity, just get two AGM batteries in the 25A class and use what you
have.
Understanding the last comment is totally boring.
Regards
Paul
WB8TSL

On Sun, May 26, 2024 at 3:35 PM John Ackermann N8UR via time-nuts <
time-nuts at lists.febo.com> wrote:

> I need to replace the batteries in my 28 VDC power distribution system
> in the clock room.  It's currently two series 12V AGM batteries with an
> IOTA Engineering float charger.
>
> This system has two purposes: (a) primary power for some OCXOs and other
> gear; and (b) failover power for some AC/DC gear like HP standards.
> Under normal conditions, power draw is 2 or 3 amps.  During mains
> outage, it could reach 10 amps.  Now that I have a house generator, long
> run-time isn't a big issue so 25 Ah or so of capacity is plenty.
>
> I haven't explored LiFePo4 batteries until now, and I'm having trouble
> finding a charger that can provide significant continuous load current
> while maintaining a battery floated across the line.  Does anyone have
> recommendations for something like this?
>
> Thanks,
> John
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