First, it's extra work, but it's possible to configure apcupsd to run a script on events, then use that script to ignore spurious events.
Second, for people who can't necessarily afford either new UPSes or something other than "consumer grade", a good option is to find local sellers, perhaps on Craigslist or Facebook Marketplace, who are selling or giving away old UPSes. Many people and businesses don't bother replacing batteries, so they just buy new devices when the batteries near or reach end of life, and since they're heavy, they often just want to give the hardware away.
New batteries are not expensive. A common 9AH battery for many / most common smaller UPSes costs around $25 USD from Amazon sellers that have 4.5 or more stars.
I've personally never bought a new UPS for myself, yet all of my equipment and everywhere I've set up home Internet equipment for others has UPSes. I've only ever bought batteries. Just a thought.
Second, for people who can't necessarily afford either new UPSes or something other than "consumer grade", a good option is to find local sellers, perhaps on Craigslist or Facebook Marketplace, who are selling or giving away old UPSes. Many people and businesses don't bother replacing batteries, so they just buy new devices when the batteries near or reach end of life, and since they're heavy, they often just want to give the hardware away.
New batteries are not expensive. A common 9AH battery for many / most common smaller UPSes costs around $25 USD from Amazon sellers that have 4.5 or more stars.
I've personally never bought a new UPS for myself, yet all of my equipment and everywhere I've set up home Internet equipment for others has UPSes. I've only ever bought batteries. Just a thought.