Power Usage Monitor(s)
We actually have 2 power usage monitors in use now as well as a Smart Meter Display. We originally had a DIY system whixh was retired a few years ago.
The first commercial product has a nice dynamic display of our consumption on the living room mantleplace. There are a number of variants on the market these days but we are using the Electrisave.
The second monitor, for logging power usage on the server is based on a RFXMeter/RFXPwr unit reporting back to a second RFXCom receiver on the server. The data logging is handled by heyu with its built in support for the RFXCom/RFXMeter extended data formats.
The current power usage is one of the items displayed on the Pi Consoles.
As with the previous DIY logger the data is also graphed by MRTG/rrdtool and now also by Home Assistant.