When the electricity gets turned off (for whatever reason) the UPS's battery activates, but besides making the 'normal' beeping noise that signals that the battery is in use the UPS also makes this static-y noise. Try connecting a power cable to your PC except don't plug it in fully, you get that noise. I left it as it was for the night until the beeping got so loud I had to turn the UPS off. But for the future, is this noise normal? Is it safe to leave the UPS like this for the entire night if there's no electricity?
Specs (if for some reason needed): Rog strix 650W PSU Rx 6650 xt I5-11400 1080p 144hz monitor
UPS: Aviem Pro Gen3 (1000VA/600W)
Specs (if for some reason needed): Rog strix 650W PSU Rx 6650 xt I5-11400 1080p 144hz monitor
UPS: Aviem Pro Gen3 (1000VA/600W)