[Nut-upsuser] NUT and CyberPower PR3000LCDRTXL2U

Phil Stracchino phils at caerllewys.net
Sun Aug 9 00:52:13 BST 2020

Does anyone know whether it is possible to set battery.charge.low lower
than 20 on a CyberPower PR3000LCDRTXL2U?  'upsrw -s battery.charge.low
15' returns OK, but does not reduce the setting below 20.

Now you may be thinking, "Why would you want to set it lower than 20?"
Because with three battery packs, my calculated runtime is about 35
minutes at my full normal operating load, about twice that after
shutting down all non-essential services, and I only need about 2
minutes from there for a full shutdown.  *10%* would be plenty.  20% is
just pointlessly wasting battery capacity.

(Actually, I wish I could set it by *low runtime*, not low charge.  What
I'd really like to be able to do is tell it, "Shut down these
non-essential servers if we've been on battery power longer than five
minutes.  Shut down *everything* if remaining runtime drops below five
minutes."  But I don't see any way to do that without writing the code

  Phil Stracchino
  Babylon Communications
  phils at caerllewys.net
  phil at co.ordinate.org
  Landline: +1.603.293.8485
  Mobile:   +1.603.998.6958

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