With this Indigo 7 plugin you can create virtual energy meters based on other devices. The plugin will have two major features Virtual Device Energy Meter och Virtual Group Energy Meter
If you have devices that have a static energy consumption when its on you can then create an child device that act as an energy meter for that device. The engery device will also calculate accumulated energy uses in kWh. It supports all devices that support on/off or dimmers.
Group other energy meters in to one device. You can for example group all energy meters in on room together to monitor the total usage in that room. Or all one energy meter for the entire house.