Yes, it is normal for UPS to produce a static-y sound during power outages, and it is generally safe.
Yes, it is normal for UPS to produce a static-y sound during power outages, and it is generally safe.
When the power is cut off, the UPS's battery kicks in, producing a normal beeping sound and also emitting this static noise. Connecting a power cable to your PC without fully plugging it in triggers that sound. I kept it unchanged overnight until the beeping became too intense, forcing me to shut it down. For future reference, is this sound typical? Is it safe to leave the UPS running continuously during an outage?
If I were you, I would choose a more powerful UPS, such as one with 1200VA or greater. I’d also confirm the unit is fully charged for at least 24 hours before connecting it to the system.
Why the hell would you only plug the socket half-way in?
Do you want to burn it all up? Since the sound which comes from half-way inserted socket, is most likely electricity arcing, which will generate a lot of heat and will eventually catch fire.
Read your UPS manual to know why it beeps. Heck, you should've read the UPS manual PRIOR of using your UPS.
If there is no electricity and PC doesn't consume UPS power, turn the UPS off.
There might be some confusion about how the situation works. I didn’t plug the socket halfway in to show you the noise; that was meant to explain what the sound sounds like. The UPS makes the same noise when its power cable isn’t fully connected or is loose. As mentioned in my earlier post, it beeps because it’s using its internal battery. I could turn it off whenever there’s no electricity, but I won’t always be able to do that—what if I’m away, sleeping, or just feeling lazy?
When you leave the house or go to sleep, always turn off the UPS beforehand. The same applies when you're lying down. And if you're not careful, that's probably the problem.
The UPS I own is a good quality model, such as the CyberPower CP1300EPFCLCD (1300VA/780W, true/pure sine wave, line-interactive). It only makes three types of noises:
- Alarm beeps to signal events
- Cooling fan airflow noise
- A loud click when the relay switches between mains and battery
Any other sounds are unusual for a proper UPS.
On the other hand, my UPS is a cheaper, simulated sine wave type. I couldn't even identify its internal components because they weren't specified in the manual or official documents. So the sounds you hear might be caused by EMI interference, coil whine, electrical arcing, or just normal operation of this budget model.
The best solution would be to reach out to Aviem and ask them about your unit.