[Nut-upsuser] APC ups reports "OL DISCHRG" as its normal status, even when plugged into mains

[Greg Troxel]

>> 0.430484 ups_status_set: seems that UPS [GamingUPS] is in OL+DISCHRG
>> state now. Is it calibrating or do you perhaps want to set
>> 'onlinedischarge' option? Some UPS models (e.g. CyberPower UT
>> series) emit OL+DISCHRG when offline.

I think the first questions are:

  what is the UPS actually doing?

  what do other programs, especially from the manufacturer, say?

and then perhaps there is need to  have a quirk table in the code to be
able to express things like

  For APC BGM1500, if it says OL+DISCHRG, rewrite that to OL, because
  it's confused.

so that then the later logic will be ok with it.

Presumably you are watching battery voltage and it's 26ish, assuming 2
12V in series, or similar, so not actually discharging.  True?

What is the status when the power fails?  You said it included DISCHRG,
but anything else?

Did you trace/debug-log the code that led to OL+DISCHRG?   What bits is
the UPS really sending?  Is this is a UPS bug or a nut bug, or the UPS
has an odd spec or ?

More questions than answers, but hope it helps
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