CyberPower CP900EPFCLCD showing incorrect output voltage

[owennelson]

Using the usbhid-ups driver my CP900EPFCLCD reports the output voltage as being between 260 and 270 - though it sits at 260 most of the time. The input voltage averages around 240 as would be expected.

Running the driver directly (/usr/local/libexec/nut/usbhid-ups -DDD -a ups) results in the following voltage information:

0.010678 Report[get]: (3 bytes) => 0f ef 00
0.010687 Path: UPS.Input.Voltage, Type: Feature, ReportID: 0x0f, Offset: 0, Size: 16, Value: 239
...
0.011178 Report[get]: (3 bytes) => 12 ef 00
0.011188 Path: UPS.Output.Voltage, Type: Feature, ReportID: 0x12, Offset: 0, Size: 16, Value: 260

I'm not entirely sure what to make of this, though it would appear that ef (239) is somehow being interpreted as 260?

Extra note: Configured through FreeNAS's UI and set to CP1000PFCLCD as it's the closest option - not sure if this makes any difference.

[clepple]

Probably the same as this issue: #439

[serfriz]

Any update on this? My CyberPower CP1500PFCLCD shows an output.voltage of 142.0

[alexruffell]

My PR1000RTXL2U reports faulty measurements in battery and output voltages:

battery.charge: 100
battery.voltage: 2.4
battery.voltage.nominal: 22

However the LCD panel shows the voltage at around 48V. The correct input/output line voltage is 120V for where I am located but the UPS reports:

input.voltage: 122.0
input.voltage.nominal: 120
output.voltage: 253.0

and likely unrelated to this issue, it also reports:

ups.status: OL

which I am guessing means OverLoad, which it definitely is not.

[flashydave]

OL means ONLINE not OverLoad!

[flashydave]

As mentiondd above the output voltage issue IS identical to #439 and is now fixed subject to merging.

Regarding the battery voltage CPS are aware there are some issues and have fixed at least one of them on new production models. Sadly they said on cheaper models their firmware is not field upgradeable to fix existing users.

[alexruffell]

I wonder whether they include my $600-700 PR1000RTXL2U in that group. I will check to see if there is a firmware upgrade but as far as I recall I never saw one for the UPS itself, just the RMCard.

[flashydave]

I'm not sure the extent of any similarities between CPS products or code construction. I was trying to fix my CP900EPFCLCD battery and output voltage reporting and they confirmed back to me the points I made above.