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

[Bob Camp]

Hi

There are several outfits that do very good LiFePO4  chargers. One is Victron. Often the answer is a hybrid inverter/ charger. They aren’t cheap…..


Bob

Sent from my iPhone

> On May 26, 2024, at 4:35 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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