Unknown children entities

[DorwinDT]

I have created group of children entities but summary of power doesn't correspond to house load. there are some appliances not monitored, loss in photovoltaic inverter etc. see attached image:

it will be fine to have possibility to have some "entity for rest power" or so, it will have benefit, that I can see that power instantly and it is not necessary to subtract total load from summary of parcial devices so in case of previous image it cane something like this:

thank you !

[MindFreeze]

See remaining_parent_statein the readme and in the forum