[Nut-upsuser] battery not installed, but battery still 100% and NUT 2.7.2-4 does not catch this and report a error

Gene Heskett gheskett at shentel.net
Mon Apr 3 17:33:13 UTC 2017

On Monday 03 April 2017 11:41:56 Jon Bendtsen wrote:

> On 03/04/17 17.24, Roger Price wrote:
> > On Mon, 3 Apr 2017, Jon Bendtsen wrote:
> >> On 03/04/17 17.10, Roger Price wrote:
> >>> On Mon, 3 Apr 2017, Jon Bendtsen wrote:
> >>>> Power seem to be lost immediately.
> >>>> But my APC Smart-UPS 1500 always reported everything OK.
> >>>> battery.charge     :     100
> >>>
> >>>   ...
> >>>
> >>>> battery.mfr.date     :     2005/08/26
> >>>
> >>> Hi, Could you confirm that the battery is nearly 12 years old? 
> >>> Roger
> >>
> >> yeah, it most likely is that old
> >
> > That's probably the cause of the immediate power loss.  A new
> > battery should fix the problem.  Roger
> yeah a new battery will most likely make it go away. However, that is
> not why I wrote the email. I wrote the email because I want NUT to
> tell me much more clearly that something is wrong, and NUT currently
> does not do that.
> JonB
Nut, IIRC, can do a periodic battery test by putting it offline, using 
the battery, for a predetermined length of time, weekly, monthly etc, 
and IIRC recording the battery voltage just as it switches back to line 
power. The comparative voltage level at the switchback point is a pretty 
good indication of the battery condition, and I think that could be used 
to trigger an "I need a new battery" email message well ahead of an 
unexpected total fail shutdown.

I have a 20kw nat gas fired standby generator thats typically live in 5 
seconds since the Mrs. has COPD, so I have never set that up here, but I 
believe you can find that in the Nut docs. Unless its been elided in the 
last 15 years. :(

Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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