UPS - Low Power (parameters)

[xbmcgotham]

Hi,

I like to know what the "Low Power" parameters/conditions are, when selected in the UPS service configuration page.

I am trying to test if the (Freenas) Server is being shutdown when selecting the "Low Power" option from the dropdown list.

The reason I am asking, is that during a test run, the (Freenas) server had not gone in shutdown even when it came to 4 mins UPS battery power left. I did not want to risk damaging the server so I canceled the test.

BTW, the optie "switch of on battery" works fine and I can read the APC using the upsc command in shell.

Hope some one can answer this question. Thanks!

 

[sretalla]

"Low Power" (I think you are referring to "UPS reached Low Battery") will be referring to the remaining battery charge %, not the amount of minutes of remaining runtime (even though the two are sort-of linked by calculation).

 

[xbmcgotham]

Hi, thanks for the reply.

Yes, that is the option I was referring to. However, what is the % it will trigger the shutdown of the Freenas server? Or do I have to put this number into to config of the UPS service somewhere?

 

[sretalla]

Don't know for sure how it's determined, but I think it's by the UPS software (so might be different dependent on your UPS).

A bit of digging around google showed up a couple of indicators that it might be 10%

Detailed NUT Configuration - The IPFire Documentation

wiki.ipfire.org

see: battery.charge.low: 10

 

[xbmcgotham]

Ahh, ok. so it seems that freenas is not setting the percentage of "low battery" but the UPS itself. And the UPS will broadcast a "low battery" parameter in the form of something like "battery.charge.low" instead of "10" % value that freenas than uses as a trigger to switch it off.

I will have to run this test again next week to see what the current UPS value is and if it will work when it passes this value.

Thanks again for checking this for me. and I will get back to you.