There are various energy monitoring devices like the Aeon Energy Meter which clamp on to the power cables to ‘read’ the energy usage. See https://aeotec.com/z-wave-home-energy-measure
There is also the Smappee https://www.smappee.com/uk/home which works on the same underlying basis but is smarter and more attractive.
There are also some smart wall plugs which can monitor the electrical usage of the device plugged in to the smart plug. See https://aeotec.com/z-wave-plug-in-switch
However what I have learned recently is that the various smart meters being rolled out to homes are themselves Zigbee devices. This means that in theory they could be connected to a Smartthings Hub directly and then monitored.
Note: Some terminology, a smart meter is the bit that replaces your old traditional meter and is normally hidden in a cupboard or under the stairs. The LCD display usually bundled with the smart meter is called an IHD - an In Home Device. There is also a CAD - a Consumer Access Device. Some energy supplier switching firms e.g. Labrador provide a CAD which links via Zigbee to your smart meter and then sends them the figures over the Internet.
So, in this scenario we could in theory link a smart meter to Smartthings making Smartthings the CAD.
Has anyone tried this sort of thing? I can’t myself as I currently still have dumb meters.
Is it possible to link a Zigbee device to more than one other system/device at the same time? One might want to still link the IHD as well as a Smartthings hub.