[Nut-upsuser] Shutdown time configuration

[Charles Lepple]

On Dec 17, 2019, at 3:45 PM, Phil Stracchino <phils at caerllewys.net> wrote:
> 
> Also, looking at my own monitoring graphs of what happened around the
> outage, it looks as though runtime on my UPS is strangely non-linear
> with respect to load — i.e, dropping to my critical-systems-only load
> which is about 40% of my normal total load (which is to say, slightly
> less than 20% of UPS capacity vs. about 45%) does not appear to have
> extended runtime nearly as much as expected.  It more than doubled the
> UPS's PROJECTED runtime according to the UPS, but not the *actual*
> runtime.  Also, it looks from my graphs as though the UPS was claiming
> 10% capacity when it shut off, but 80% when the power came back on.
> 
Slightly tangential to your original issue, but do the values like load (as reported by NUT) generally track the front panel display? We have a number of CyberPower issues whose root cause is a disagreement as to how the HID descriptor (and therefore, the HID reports) should be parsed and interpreted. Link to the whole mess (which includes some other non-HID CPS issues):

https://github.com/networkupstools/nut/issues?q=is%3Aissue+is%3Aopen+label%3A%22CyberPower+%28CPS%29%22

That said, I don't think that differing load when on/off AC is going to fall into the HID category, but there are certainly a lot of open questions surrounding some of the reported values.

As Roger suggested, doing a manual self-test on the batteries may be useful. (I don't know if we should see it or not for this model, but I don't see a variable with self-test results in the upsc output.)