Recently I have bought a system containing 7850x3d CPU, 9070xt GPU, 32gb ddr5 RAM, Coolermaster 750 W 80+ Gold PSU. However, a line interactive ups I have bought from a local brand (i mean not global) broke in a week. I am not sure if it is just bad product or due to it not being pure sine.

I intend to buy a 1200VA online or 1600VA line interactive ( assuming online will have a good pf, i will still check some models). I mostly need it to hold enough until my building's generator activates and to save my components from stress.

The store that sold me the build says live interactive is good enough but online i saw both arguments, what would you suggest?