Check out the Eaton 5PX series. Local web-based management, no subscription BS, easy to replace standard 12v7ah batteries in a user-serviceable sled, can be use

Check out the Eaton 5PX series. Local web-based management, no subscription BS, easy to replace standard 12v7ah batteries in a user-serviceable sled, can be used as a tower or rackmount, 120v options available, and you can find them on ebay in good condition for ~$300 shipped with some patience. Just pay attention to the ones with 5-20P plugs, but those can be used with standard household outlets via a simple mechanical "5-15p to 5-20R" adapter, assuming you won't be pulling more than 15 amps. APC is a trash company with trash products. I've had at least 4 of their prosumer UPS models fail over the years.