Hello Luca,
I'm currently using the eMonitor 4, which has an API that can be used to access the data that it produces (although I have not yet used it). I'm not sure if the eMonitor is compatible with European standards or not. However, I'm curious to know how you would integrate this data with your home automation system. What would you have activated (or deactivated), depending on your electricity usage?
-Vito