[FEATURE REQUEST] Correctly add up Individual Power Providers to the household

[lxffm]

Is your feature request related to a problem? Please describe.
I've added my Roof Solar installation as Solar, and my balcony power plant (two solar modules) as an Individual.
I've inverted the Individual since it is providing power actually. Thing is, it doesn't actually increase the household consumption. The only I could configure in the household settings is, that I can subtract this power from the household, as if it's an electrical consumer. But since it's an power provider it must be added up to the hosehold, as the household is basically consuming it either.

Describe the solution you'd like
I guess it would basically make more sense, to have a configuration option within each Individual, whether it should be subtracted, added up or be neutral to the Household. And the current configuration should be removed from the current household settings.

Does that make sense to you?

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Additional context
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