Ya, I don't think you really need that much as a UPS but if you ran the AC180 in UPS mode, it would turn the fan on every 15-20 minutes as the circuity in the battery is still powered by the battery, even though the power is fed to your gear from the wall power. That results in it slowly going to 99% and then charging, which is noisy on the non-elite models in a quiet room. These LFP models are good for like 3000 cycles though, so using it as UPS it'll still last a decade or longer with 80% capacity left over.

There's the Elite 30 which can be a nice little battery backup / be portable and isn't too much more expensive then the comprable SLA types that don't last long.