Yes ans no.
It is not mandatory but if you have solar or other local generation with a grid connect system and you want that information to show up then yes you need to add a sensor for return to grid.
Otherwise all you will see is this:
Yes ans no.
It is not mandatory but if you have solar or other local generation with a grid connect system and you want that information to show up then yes you need to add a sensor for return to grid.
Otherwise all you will see is this: