I installed an IotaWatt, mainly to monitor my Sanco CO2 heat pump. I can now see when it comes on, turns off, and how much energy it is using. As a bonus I found and vanquished about 200 W of vampire drains in my other circuits.
Here is the panel and Orbit box:
Here is my power graph with the heat pump trace:
Here is my Hubitat display, which shows all the temperatures related to the heat pump, and the current power draw for it.
The thermocouples all feed into a Konnected alarm board, which feeds the Hubitat.