I currently have three main servers in my cabinet, two of which are NAS systems.To prevent losses due to unexpected power outages, an UPS power supply must be installed.And for a UPS to control the automatic shutdown of three hosts, it requires a UPS server to communicate with the UPS device, so that when the UPS battery is depleted, all hosts will notify them to shut down.You may have never heard of it, but it's almost present on every platform.Clients for Windows, MAC OS, ESXi, and more are all supported.
You can check the UPS brand and model website supported by NUT: The UPS currently in use is the UPS2000-G-1KRTS, a rack-mounted unit with an output capacity of 1kVA.
This is also an online UPS, which means that the alternating current voltage used by the load must pass through an inverter circuit, undergo two conversions of AC/DC and DC/AC, before being supplied to the load to provide a good sine wave AC power to the equipment. However, the downside is that the two conversions of power will result in losses. The efficiency of this UPS system can reach 88%. But since it's for household use, the fluctuations in household power supply are not significant. Therefore, to improve efficiency, the eco-mode is typically used. When power fluctuations are within the set ECO mode, the inverter in the uninterruptible power supply does not activate.
Power is directly outputted through a bypass, resulting in efficiency close to 100%. In cases of significant power fluctuations, it can automatically switch to inverter mode to ensure normal power supply for all equipment.
