On Thu, Jan 5, 2023, 16:22 Keith Lofstrom <[email protected]> wrote: > I have an ancient Tripplite 700VA UPS, which is briefly > triggered maybe twice a year, and needs a new sealed lead > acid (SLA) battery maybe every two years. Oh boy, more > toxic waste, and shopping trips, and disposal trips. > > Theoretically, it can provide a signal that tells my > computers to prepare for shutdown, but it doesn't seem > to play nice with Linux. Most of the outages have been > less than 30 seconds, so triggered shutdown is not a > "must have". However, extra bonus points if the UPS > /does/ behave well with more than one Linux machine. > > The load is two computers (250W) and perhaps one of two > screens (another 60W?). Note that 700VA actually means > something like 400W continuously delivered - perhaps > the VA number covers the peak impulse power at computer > startup, or during a power line excursion. > > New technology LiFePO4 batteries last much longer and are > environmentally cleaner than an SLA, and are shape and > terminal compatible, but they charge differently. > I tried one and failed. > > Perhaps there is a warranty-voiding retrofit hack for the > Tripplite, but for safety's sake I prefer to purchase an > Uninterruptable Power Supply designed for LiFePO4. > > Searching on Amazon reveals some $1K units (and a crap-ton > of SLA in response to "Lithium"), more power than I need > and way more dollars than I wish to spend. I don't mind > spending 2X, but not 5X. > > Suggestions? > .
I came to the same lithium based battery UPS conclusion - there are no easy, economical, reliable and save choices. My solution is to get and wire external marine deep discharge battery to my UPS when I need to replace its internal SLA battery. They play nicely with the UPS and should last about decade for the similar cost to SLA. Basically, I am kicking the can down the road! Maybe, I will be able to UPS the whole house with an EV if/when I get one some years down the road and forget about these crappy, expensive UPSs. - T >
