Hi there! Looks like you linked to a Lemmy community using an URL instead of its name, which doesn't work well for people on different instances. Try fixing it like this: [email protected]
Yeah as dpflug mentioned a kill-a-watt is what I hear about the most. If you have a smart outlet some of those have power monitoring built into the app you can use to track it. And if you have a UPS most of them tells you the current load on the LCD screen.