Almost all Z-Wave devices have built-watt meter.
The subject has been discussed in the past that they can not report the consumption to InControl so you get a total consumption.

Can you walk around this if you can make a solution like this, if possible, and make a FAQ.

Creating a device on every unit's wattage, multi-channel(?).
Then you create a virtual device, which you can link them other devices in order to get a total?

When you have everything working, you can then hide the remaining watt devices?
And then only have a total unit still showing the wattage?

Would this be possible?