I use UPS at work for running mass spectrometers and their related supportive equipment. Mind you they are all drawing lots of volts and the UPS is generally plugged into its own dedicated 30a circuit, but I normally see 20-30 minutes worth of power out of a unit with 24 “motorcycle-style” batteries with the overall UPS weighing in around 250lbs. It’s enough time, with the electrical draw from the mass spec system and associated components, to stop sample injections and properly shut down the instrument.
Given much of our needs, electrically though, I’d like to assume a decent unit would buy significantly longer use if properly maintained. Definitely something I’m going to be exploring in the near future as I too am one of the affected Texans in this thread. Thankfully much of my collection is tied up in brumating colubrids, but I do have some subtropical to tropical species that concern me.