Importing last PVoutput into a feed

I want to include some of the data that is going from my inverter to PVoutput.org into my local EmonHub (vlow-write-v8.5). My inverter is sending Instantaneous Power and Voltage (I am not using a transformer as the value from the inverter should be more accurate). With these two data streams I should be able to determine the available power my PV system is exporting to the grid. From this I hope to turn on and off devices based on some level of programming. I think others have developed the later side of things.

Any suggestions?