Hello, the UPS is silent while running normally, and when the power fails the inverter is most likely louder than the fan, but not extremely loud. Hope this helps.
@@gregoinc4987 Hey, does it produce any hissing sound or something similar? I've looking for something quiet, and current APC SMX model always produces hissing sound, it's unbearable in to be in the same room as UPS.
UPS has fan at the back. Is it loud? Does it spin all the time or just when running on batteries?
Hello, the UPS is silent while running normally, and when the power fails the inverter is most likely louder than the fan, but not extremely loud. Hope this helps.
@@gregoinc4987 Hey, does it produce any hissing sound or something similar? I've looking for something quiet, and current APC SMX model always produces hissing sound, it's unbearable in to be in the same room as UPS.
@@rimvylo No hissing sounds that I've heard. Like I said, it is silent until the power drops and when the inverter kicks in the units makes noise.