On Tue, 30 Mar 2021, Мартин Енев via Nut-upsuser wrote: > Hi all, I'm just getting started with NUT and I was wondering if there's a way > to test NUT's functionality without having an actual UPS. Is there a UPS > emulator I could use to trigger ONBATT, ONLINE, etc.? Yes, it's called dummy-ups. See the man page "man dummy-ups". Roger