QUOTE(power911 @ Aug 13 2020, 09:52 PM)
If your PSU cannot handle simulated sine wave then I think you better upgrade your PSU.
Simulated sine wave is still sine wave, just more square. A psu should smooth every noise from the rough shape. I mean if switching power supply is the current norm I'm ok with what modern tech can do.
My Neuropower 1500VA (that does crazy humming buzzing sounds when on battery) is running fine with my pc with Superflower 750W psu, my cheapo chinese Aiyima A03 Amp and my extra sensitive to electric spikes LG monitor.
I have faith that PSU will smooth out as much noise from a UPS in my case. It ain't business server level of concern in my case but if my monitor won't flicker or shut down from the dirty power and my amp doesn't buzz from the simulated waves, then I'd give a pass to a more expensive computer psu to smooth out any square-y sine wave my ups supply.
Plus most of the low range UPS don't even run battery until a power cut then only it switches to battery. I'm more concerned if the gap between power cut to battery mode is shutting down my pc.
Also some UPS does voltage regulating as my office is running close to 250v and my UPS drops the power down to 240v
Oddly this psu issues usually happen with more expensive gold or platinum rated PSUs and above because they utilise active power factor correction for higher efficiency. But because of the near square wave pattern, the PSU incorrectly switches off instead of working.
In cheaper PSUs the issue is hold up time in which they can't hold up power long enough for the ups to kick into action. Or even ups for that matter.
But good to know your superflower works well with your neuropower. What i notice is, nobody in Malaysia seems to complain about incompatibility with any psu with any ups. So maybe 240v environment has some mitigating effect of any pfc disruption when used with simulated sine wave ups.