Initially the UPS was being monitored by a FreeNAS installation, this was changed due to performance issues unrelated to the UPS monitoring software. Details on the migration are still being compiled, meanwhile, read this.
How come I feel there was a lot of time wasted?!
Here are the readings from the UPS. I am disappointed that it is not reporting battery voltage, but at least I am getting % charged.
battery.charge: 100 Battery charge (percent of full) battery.charge.low: 28 Remaining battery level when UPS switches to LB (%) driver.name: powerpanel Driver name driver.parameter.pollinterval: 2 driver.parameter.port: /dev/ttyS0 Serial or USB port driver.version: 2.2.2 Driver version - NUT release driver.version.internal: 0.23 Internal driver version input.frequency: 60.3 Input line frequency (Hz) input.frequency.nominal: 60 Nominal input line frequency (Hz) input.transfer.high: 145 High voltage transfer point (V) input.transfer.low: 90 Low voltage transfer point (V) input.voltage: 123 Input voltage (V) input.voltage.nominal: 120 Nominal input voltage (V) output.voltage: 0 Output voltage (V) output.voltage.nominal: 120 Nominal output voltage (V) ups.beeper.status: enabled UPS beeper status ups.delay.shutdown: 0 Shutdown with delay command (seconds) ups.delay.start: 45 Wait before (re)starting (seconds) ups.firmware: 5.100 UPS firmware ups.load: 46 Load on UPS (percent of full) ups.mfr: CyberPower UPS manufacturer ups.model: OP1500 UPS model ups.serial: [unknown] UPS serial number ups.status: OL UPS status ups.temperature: 35.3 UPS temperature (degrees C)