After my previous inquiry here I have been told that my PSU (a Cooler Master MWE Gold 850 - v2) is going to have problems using an APC UPS that outputs simulated sinewaves during battery operation so I've been looking around for an appropriate UPS (UPS that has enough power for a proper shutdown during power outage + Pure Sinewave to avoid issues with my PC PSU) and found this one, the APC UPS BR1600SI, with my lack of experience dealing with UPS's I can't be 100% certain this is a pure sinewave UPS so that why I'm asking here.