Today we say goodbye to my UPS. My old APC Back-UPS 700 gave up after a little over six years with a continuous beep. Since my homelab had grown in the meantime, the replacement needed a larger battery and more output power in watts.
This article shows how I connected the new Green Cell USV 2000VA, 1200W, manufacturer model UPS05, to my NAS despite an awkward compatibility problem. The NAS detects the UPS, but Synology reads almost no useful values from it. The workaround is to move the USB connection to a mini PC, let a NUT server in a Docker container read the device, and expose the status over the network.
Once the steps are done, the NAS knows the state of the UPS again and can shut down in time. PeaNUT gives you a quick look at the values if you want them, through PeaNUT.
Why the new UPS provides almost […]