[Nut-upsuser] unexpected UPS status

[Eyal Lebedinsky]

This is part UPS and part nut question.

I had a (intentional) power outage. The UPS/nut properly shut the system down when battery was down to 20%.
It ran for only 18 minutes rather than the expected 40 (see later).
After it charged to 37% I removed power from the UPS. After 4-5 minutes the system shut down.
However, when I restored power to the UPS the machine powered up immediately (no delay). I though it was supposed
to wait for a higher charge?

Nevertheless, the UPS reported a charge of 58% when the machine restarted, I expected about 20%. Free energy?

Q1) Does this last exercise indicate a bad battery that woke up on the second restart?
     Or a failed UPS?
     The UPS is a Eaton 5E1500i. It is only 6m old and within the warranty period.

Q2) What is the parameter I need to set on the UPS for a minimum charge before restarting power?

$ upsc eaton
Init SSL without certificate database
battery.charge: 68
battery.runtime: 1290
battery.type: PbAc
device.mfr: EATON
device.model: 5E 1500i
device.type: ups
driver.name: usbhid-ups
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.parameter.productid: ffff
driver.parameter.synchronous: no
driver.parameter.vendorid: 0463
driver.version: 2.7.4
driver.version.data: MGE HID 1.39
driver.version.internal: 0.41
input.voltage: 240.0
outlet.1.status: on
outlet.desc: Main Outlet
outlet.id: 1
outlet.switchable: no
output.frequency: 50.0
output.frequency.nominal: 50
output.voltage: 241.0
output.voltage.nominal: 230
ups.beeper.status: enabled
ups.delay.shutdown: 20
ups.firmware: 03.08.0020
ups.load: 15
ups.mfr: EATON
ups.model: 5E 1500i
ups.power.nominal: 1500
ups.productid: ffff
ups.start.battery: yes
ups.status: OL
ups.timer.shutdown: -1
ups.vendorid: 0463

TIA

-- 
Eyal at Home (eyal at eyal.emu.id.au)