If you don't mind building you own UPS from COTS parts, you may want to look at Xantrex (https://xantrex.com/). I have one of their UPS units (the FREEDOM XC PRO 2000) in an RV with 2 100AH LiFePo4 batteries in parallel.
I've considered using them for IT deployments but haven't pulled the trigger just yet. On Tue, Apr 8, 2025 at 2:30 AM borg--- via NANOG <nanog@lists.nanog.org> wrote: > Oh, im interested with more details about your setup. > I have 2x APC SmartUPS 1000 units here that I need to replace > batts soon. So I slowly think about LFP batts :) > > This UPS needs 2x 12V 12Ah batts (RBC4). > Can you recommend some LPC batts as repleacement? > There is enough room in UPS to but small BMS on top of batts. > APC SmartUPC 700 is much worse in that regard. I had one such > unit and scrapped it. Batt temps where higher due to cramped space, > and so they lifetime.. > > Regards, > Borg > > PS: You can asnwer off-list w/ attachments :) > > > ---------- Original message ---------- > > From: Javier J via NANOG <nanog@lists.nanog.org> > To: North American Network Operators Group <nanog@lists.nanog.org> > Cc: Javier J <jav...@advancedmachines.us> > Subject: [NANOG] Re: Small Capacity UPS > Date: Mon, 7 Apr 2025 12:03:08 -0400 > > Resending this without pictures because file size rejection. > > I'm just catching up on this thread so I have probably missed a bunch but I > wanted to share my experience. I originally started to replace old > batteries in my UPS's with AGM batteries instead of SLA. More recently I > have been going with LiFePo4 (Lithium Iron Phosphate) and with units with 2 > batteries (24V) adding in a battery balancer. > > examples attached. that white, yellow one is like 28 years old. running > strong. > > my observations and research reveal that old UPS units sometimes float at a > higher voltage, which makes LiFePo4 a perfect upgrade to lead acid based > battery technology. Also should last forever. (10+ years and thousands of > cycles) > > I have 5 UPSs, most I got for free. I also have a solar system in the back > yard and here in Florida those LiFePo4 batteries (the cheapest I can find > on Amazon at the time) are doing just great keeping all the cameras in the > backyard running plus I run power tools etc from them as needed. they're > not making lithium iron phosphate batteries with high current cranking > capacity. next time I have a car battery to change the prices should drop > low enough for that I'll be replacing it with that. > > On Mon, Apr 7, 2025 at 12:00˙˙PM Mark Tinka via NANOG < > nanog@lists.nanog.org> > wrote: > > > > > > > On 4/7/25 12:54, Jared Mauch via NANOG wrote: > > > And the battery has inbuilt fire suppression system: > > > > > > > > > https://eg4electronics.com/backend/wp-content/uploads/2024/03/EG4%C2%AE-Indoor-280Ah-Battery-Specifications-Sheet.pdf > > > > > > Most things can catch on fire, sure.. but not everything lacks any > > > safety systems. > > > > LFP will experience thermal runaway at about 270°c, while NMC will > > experience the same at 210°c. > > > > It's quite a lot to subject your batteries to, especially if you have a > > reliable BMS. > > > > On average, the failure rate of quality LFP cells is about 1 in 10 > million. > > > > Mark. > > _______________________________________________ > > NANOG mailing list > > > > > https://lists.nanog.org/archives/list/nanog@lists.nanog.org/message/NMSR7FYJX472CXEMUUQEYJNJJJJUWQG3/ > _______________________________________________ > NANOG mailing list > > https://lists.nanog.org/archives/list/nanog@lists.nanog.org/message/PXYNFGUTBFBZJE6QFA4ZDC52QPJMKMZC/ > _______________________________________________ > NANOG mailing list > > https://lists.nanog.org/archives/list/nanog@lists.nanog.org/message/BOT5ZVIXAQCTFOLPZDIVWXTDMR64P3E2/ > _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/nanog@lists.nanog.org/message/Q3MA3OKZO34IP57MSKS2FGLEILAXEVYK/
