cross-posted from: https://lemmy.ml/post/24328274

Hey I need your help.

Recently I bought a Riello NPW 2000 that output a "pseudo-sinusoidal" wave when running on battery the fact is that I read on the web that modern servers could have problems with it.
Mostly right, as I found that my server (poweredge t430) is not running good with it. When unplugging the power to test the UPS sometimes it make the server just power off and reboot (as said in the bios, turn on when power goes on again) or it put the ups in safety mode (continuous beep).
Tried disabling the PFC in IDRAC settings, as far I haven't noticed power off issues but only safety mode issues with the UPS... (So in fact the server power off, but will never go on battery)

In both cases the server is running fine on battery the issues are just happening when switching.

If anyone has an idea.. Thank you

After research I found that the server never turns off when disabling PFC but will eventually make the UPS goes into fault, I fought it was the fault of the PC that was putting the UPS in protection mode, but it was not the case as I tried to power a TV and it did the same thing.... So I'm good to buy another one...

EDIT : some clarifications & partly resolving the issues