Have you found Virtual Feed - Post-processing data on the fly | Archived Forum
and Understanding Virtual Feeds
I am not an emoncms expert. If you cannot get the virtual feed to work with My Solar, then you can go back to one of the input processes, at the end add
Reset to zero
and start again. Add each branch power with
+input
in the input processing, then do as you’ve done with the separate branches - convert to kWh etc, and send the result to the “sum” feed.