Date: Sun, 09 Apr 2023 20:41:01 +1000 From: Ian Smith <smithi@nimnet.asn.au> To: Olivier <Olivier.Nicole@cs.ait.ac.th>,Chris Hill <chris@monochrome.org> Cc: roberthuff@rcn.com,questions@freebsd.org Subject: Re: seeking recommendation: UPS for Freebsd Message-ID: <9696D441-4956-4DF0-A03D-3FD9486DF680@nimnet.asn.au> In-Reply-To: <wu74jppu21k.fsf@banyan.cs.ait.ac.th> References: <wu74jppu21k.fsf@banyan.cs.ait.ac.th>
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On 9 April 2023 2:12:23 pm AEST, Olivier <Olivier.Nicole@cs.ait.ac.th> wrote: > >> I have an older APC UPS (BackUPS RS 1500) that after years of > >> excellent service _may_ need to be replaced. > > > > Do check the batteries first. The lead-acid gel cells used in UPSes > > don't last forever, and will need to be replaced now and then. If your > > UPS is 10-ish years old or more, I'd suspect the batteries first. > From experience, my batteries usually last 2 to 3 years in APC. That may > be due to cheap quality... So I know I have to change the batteries > on a > regular basis, to the point I have the batterie installation date on a > sticker on the front of the UPS's so I can know when I need to change > them. We've had a couple of smaller Eatons, and found decent quality 12V gel cells tend to last 3 to 5 years, depending on how often they're discharged toward exhausion - maybe a dozen times some years, in a rural high-thunderstorm area. Even if rarely discharged I'd be surprised to get 10 years from a gel battery, apart from large stationary (e.g. solar) setups. When we remember, we do an annual measurement exhaustion test, to be sure. cheers, Ian
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