The model ZW140 Dual Nano Switch does
not have the ability to monitor energy consumption.
The model ZW132 Dual Nano Switch supports the
energy metering feature and you can see the words
“with Energy Metering” on its packaging box.
I feel your pain. Hope you can still return it? For z-wave I use the fibaro dimmer. But I’m not sure if all fibaro products have power monitoring.
If you are willing to use a wifi module with power monitoring, take a look at the shelly2
Even if I cannot return it, I could find a use for it elsewhere. More of the hassle to cut power, pull the outlet apart and rewire than anything else.
Thanks for the heads up on the shelly2 but I am trying to keep with a single protocol as much as possible and z-wave has been flawless for me where my wifi is spotty throughout the house.