Network UPS Tools - unable to power off the load

Configuration
1

Hi
I am running HA (HA OS) on a NUC type machine (Gigabyte Brix GB-BXBT-1900) and an EATON 3S 550 (first generation) ups - typical standalone confiiguration
The NUT add-on and NUT integration in general works OK - ups is visible, all ups status data are displayed however I cannot get ups to shut down when the low battery condition has been reached
In short:

  • when on battery and when low battery condition has been reached NUT triggers Home Assistant shut down
  • the power supply on ups outlets is still on so the BRIX restarts- this cycle can continue until battery of the ups has been drained to 0

I can execute the clean shutdown of both BRIX and UPS by executing following commands in the terminal window:

**docker exec addon_a0d7b954_nut upscmd -u user -p password [email protected] load.off.delay 90**
**shutdown**

So apparently the add-on works OK; there do not seem to be any issues with the driver; it looks more like a configuration issue

The NUT add-on configuration is a follows

NUT configuration parameters
NUT configuration parameters1357×427 15.7 KB

Any hints how to set it up to switch both the HA machine and UPS when low battery threshold has been reached will be appreciated

2

Hi,

Sorry I know this post is a bit old, but I was wondering if you managed to solve this issue. I have the same hardware as you and I am considering buying a eaton 3S UPS to give me time to shut down cleanly HA in case of power cuts. If this doesn’t work however this is a deal breaker for me so was hoping to have an update on this issue.

As a side question, how long are you able to run the NUC on the UPS ?

Thanks

3

Did you ever solve this? I am experiencing exactly the same with a similar configuration.

4

I’m thinking once the OS has been shutdown, it should not be auto-powering backup unless maybe the BIOS is set to do just that?? If this is the case, then if the BIOS is set to keep the OS shutdown, then I don’t think one would need the load.off.delay command.

Anyway, there is a way in HA to issue upscmd commands, (load.off.delay is a upscmd command) using Device Actions, however I don’t see a Device Action for this particular command. I would recommend you write up an issue about this being a missing command and see what they say.

5

Thanks for the answer. I found a discussion about this in the nut add-on issues (Not powering down the UPS · Issue #35 · hassio-addons/addon-nut · GitHub). I understand that it is not possible to implement the shutdown of the UPS from the add-on container. Therefore there is no simple solution to the problem. I am considering to put another system (pi zero?) running nut as primary and make it shutdown the system running HA OS (running nut as secondary) and the UPS.