Ergy "Renewable devices" ??

I’m testing Ergy again, after some time without it, (made LUA crazy last time). So far all good. But:- configuration contains those checkboxes for whole house (which I understand), and “Reneawable” which I don’t understand.

What is a Renawable device? It seams that the list only contains devices that reports current power consumption. But they are already reported (checked or not) in the Ergy graphical UI.

Possibly a production device, so checking it won’t show it as a demand device; and presumably be used correctly in certain calculations. From the Ergy site though, it looks like some of the renewable / production tracking is only available in the Plus version.