Following on from another thread where I'm having to change my workflow to import my electricity and solar data to calculate stuff I've been wondering if the simple, but more expensive, solution is to just fork out for a smart meter. Right now I get electricity data from the power company including solar export and grid consumption then combine that with production data from the solar array to calculate how much solar I have self consumed. My process works, but it's manual and I'm having to do more and more transformation to import the data as we go, so not ideal. From what I understand there is a magical device that goes somewhere in the powerboard that measures power coming out of the solar array, power moving into and out of the grid and then does all the maths for me... is this correct? Does such a device exist? OR do you need to have the right solar inverter to talk to an add on box to make the magic happen?? (I've seen Fronius setups which have that pretty web interface showing just what I want (ideally with a data export)). Does anyone have this mythical setup? and would they recommend it?