You might also like to look at the iammeter WEM3080T three phase energy meter. Ref: https://www.iammeter.com/ It cost me about AUD $230 delivered.
I am using one to monitor my single phase solar setup including my hot water diversion. You may need 2.
If you buy from IamMeter direct, it ships from Australia so you will have it in a few days. They have full instructions on how to integrate with HASS. Thy have awesome support and their cloud app is pretty amazing as it gives far deeper insight into your energy consumption.
They have just released MODBUS/TCP support and have articles, videos and config files on how to use it with HASS. This gives real time data to HASS and will be my next project!
Their product and support is first class and the reason why I have got involved with HASS in the first place!