Aeon Labs Z-Wave Home Energy Meter 2nd edition works with Z-Command.
It shows the energy meter as a sub device (8.3.1 in the screenshot) with real time energy usage as well as cumulative energy usage.
Z-Command however also detected other devices which are not yet supported. Those are 8, 8.2.1 and 8.2.2 in the screenshot. A future update will reveal what those are.