WinNUT - The Windows Network UPS Tools


What is WinNUT

WinNUT is a partial port of the Network UPS Tools (NUT) to Windows. The NUT package is a suite of tools to monitor Uninteruptable Power Supplies (UPS's) that provide a serial connection to monitor and edit their status and configuration. It provides access this status and configuration information through the network. It is currently available for the various Unix flavor OS's. See the NUT homepage for full details.
The source code for the windows port is made available under the terms of the GNU General Public License

What has currently been ported

Currently, only the monitoring utility has been ported. This allows you to monitor a ups with a serial (or usb) connection to another machine, but that powers both. It allows for messages from the ups to be displayed on the windows machine (ie a popup window when the power fails and when it is restored), and can also shutdown windows (and power down the machine, if supported) when the ups is about to run out of battery power.

What windows versions are supported

Theorically all Win9x/ME and NT/2000/XP/2K3/Vista are supported, however I don't have a full array of systems to test against. Here is a list of OS's I've successfully tested against or have had reports of success or problems.
See the Platform list for full details


  • Latest versions now hosted on Google Code
  • Version 2.0.0b
  • Version 2.0.0a
  • Version 1.2.1a
  • Version 0.45.2c
  • Version 0.45.2b
  • Version 0.45.2a
  • Version 0.44.1c
  • Version 0.44.1b
  • Version 0.44.1a

    Announcement Mailing list - There is a read-only announcement mailing list that is used for WinNUT release announcements. To subscribe, send "subscribe winnut-announce" to

    Please let me know () if you run into problems installing or using WinNUT. Please include the WinNUT version, Windows version, and NUT version you are using. Also, if you can submit relevent portions of the log files - that's usually a huge help in tracking down the problem.

  • Andrew Delpha