APC 900 with NUT

[Anonymous user]

Hello
i have a APC 900 conected with USB to a Raspberry Pi which has a NUT installation to manage. Final Goal is to do a safe shutdown of a Proxmox Server and a FreeNAS NAS.
I do see the Input Voltage but not the output of it

i have this from the Command
# upsc APC900

battery.charge: 100
battery.charge.low: 10
battery.charge.warning: 50
battery.date: 2001/09/25
battery.mfr.date: 2014/01/06
battery.runtime: 920
battery.runtime.low: 120
battery.type: PbAc
battery.voltage: 27.1
battery.voltage.nominal: 24.0
device.mfr: American Power Conversion
device.model: Back-UPS RS 900G
device.serial: 3B1402X00102
device.type: ups
driver.name: usbhid-ups
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.parameter.synchronous: no
driver.version: 2.7.4
driver.version.data: APC HID 0.96
driver.version.internal: 0.41
input.sensitivity: medium
input.transfer.high: 294
input.transfer.low: 176
input.voltage: 235.0
input.voltage.nominal: 230
ups.beeper.status: enabled
ups.delay.shutdown: 20
ups.firmware: 879.L4 .I
ups.firmware.aux: L4
ups.load: 53
ups.mfr: American Power Conversion
ups.mfr.date: 2014/01/06
ups.model: Back-UPS RS 900G
ups.productid: 0002
ups.realpower.nominal: 540
ups.serial: 3B1402X00102
ups.status: OL
ups.test.result: No test initiated
ups.timer.reboot: 0
ups.timer.shutdown: -1
ups.vendorid: 051d