[Nut-upsuser] CyberPower CST150UC: Question re: battery.runtime.low configuration settings

[tim.o]

I would like to solicit some feedback re: the 
battery.runtime.lowconfiguration settings through NUT. I was able to set 
the value using the 'upsrw' command but when I did a 'upsc' the 
configuration seems incorrect. Please see below for details. Thank you

OS name and version:
     Description:    Debian GNU/Linux 12 (bookworm)
     Release:        12
     Codename:       bookworm

exact NUT version:
     Version: 2.8.0-7

NUT installation method:
     apt install nut

exact device name and related information:
https://www.cyberpowersystems.com/product/ups/battery-backup/cst150uc/
     device.model: CST150UC
     driver.version: 2.8.0
     driver.version.data: CyberPower HID 0.6
     driver.version.internal: 0.47
     driver.version.usb: libusb-1.0.26 (API: 0x1000109)
     ups.vendorid: 0764

supported UPS variables (default values PRIOR to configuration change 
attempt)
     upsrw CST150UC
             [battery.charge.low]
             Remaining battery level when UPS switches to LB (percent)
             Type: STRING
             Maximum length: 10
             Value: 10

             [battery.runtime.low]
             Remaining battery runtime when UPS switches to LB (seconds)
             Type: STRING
             Maximum length: 10
             Value: 300

             [ups.delay.shutdown]
             Interval to wait after shutdown with delay command (seconds)
             Type: STRING
             Maximum length: 10
             Value: 20

             [ups.delay.start]
             Interval to wait before (re)starting the load (seconds)
             Type: STRING
             Maximum length: 10
             Value: 30

set UPS variables (system will shutdown when 60 minutes of runtime is left)
     upsrw -s battery.runtime.low=3600 -w CST150UC at localhost
     SUCCESS

upsc CST150UC at localhost
     battery.charge: 100
     battery.charge.low: 10
     battery.charge.warning: 20
     battery.mfr.date: CPS
     battery.runtime: 5125
     battery.runtime.low: 16
     battery.type: PbAcid
     battery.voltage: 25.8
     battery.voltage.nominal: 24
     device.mfr: CPS
     device.model: CST150UC
     device.serial:
     device.type: ups
     driver.name: usbhid-ups
     driver.parameter.offdelay: 60
     driver.parameter.pollfreq: 30
     driver.parameter.pollinterval: 2
     driver.parameter.port: auto
     driver.parameter.synchronous: auto
     driver.version: 2.8.0
     driver.version.data: CyberPower HID 0.6
     driver.version.internal: 0.47
     driver.version.usb: libusb-1.0.26 (API: 0x1000109)
     input.voltage: 122.0
     input.voltage.nominal: 120
     output.voltage: 122.0
     ups.beeper.status: disabled
     ups.delay.shutdown: 60
     ups.delay.start: -1
     ups.load: 10
     ups.mfr: CPS
     ups.model: CST150UC
     ups.productid: 0601
     ups.realpower.nominal: 900
     ups.serial:
     ups.status: OL
     ups.test.result: No test initiated
     ups.timer.shutdown: -60
     ups.timer.start: -60
     ups.vendorid: 0764

The value changed to battery.runtime.low: 16, instead of 3600. I don't 
understand why, because executing the command resulted in SUCCESS.

In comparison executing (never powers on the load, even when main power 
returns)
upsrw -s ups.delay.start=-1 -w CST150UC at localhost
resulted in the correct value being set.

I hope someone will be able to provide some guidance. : )

Thank you
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