[Nut-upsuser] Can't get CyberPower UPS to work with Raspberry Pi 4

[Charles Lepple]

On Oct 26, 2020, at 9:01 AM, I wrote:
> 
>> battery.voltage.nominal: 24
> 
> I don't have the citation handy, but I think another user reported that the battery.voltage returned by the UPS is a constant 24.0 V, regardless of the actual battery voltage.

Here's what I was thinking of:

https://github.com/networkupstools/nut-ddl/blob/8995562a0253e980d36f6bdddfe09c9f2c866657/Cyber_Power_Systems/Cyber_Power_Systems__CP1500PFCLCD__usbhid-ups__2.7.1__01.dev#L11-L13

"CyberPower states that battery voltage is not supported in this model of UPS. [CP1500PFCLCD; circa 2014]
It's not even shown in their 'PowerPanel' software."