u/Grankongla

I had an issue with my old UPS and ended up buying a CyberPower VP1000ELCD as a replacement, but where my old PowerWalker was quiet this one makes a ton of noise when on battery, despite the low load. It has a constant loud buzzing and intermittent clicking noise. It makes the noise regardless of battery capacity as well. Is this to be expected with some UPS types or should I rma it?