Feature request: configurable energy flow logic

[Nero201988]

Feature request: configurable energy flow logic

My real system flow is:

• PV → battery
• battery → house
• grid → house
• house → grid (export if surplus)
• no direct PV → house
• no direct battery → grid

The battery always supplies the house first.
Only if the house does not need the available energy, the surplus flows from the house to the grid.

Example 1 (battery supplying the house):
The battery has sufficient charge and can dynamically provide power (e.g. controlled by a Shelly or similar device).
If the house currently needs 1800 W and the battery provides 800 W, then:

• 800 W come from battery → house
• 1000 W come from grid → house

Example 2 (battery full, PV surplus):
If the battery is already full and the PV produces 800 W while the house only needs 200 W, then:

• 200 W go to house
• 600 W go from house → grid

There is no direct PV → house connection and no direct battery → grid connection in this topology.
All energy always passes through the house node.

Currently the card always visualizes an implicit PV → house flow.
In my setup this is incorrect and cannot be represented.

Many real installations with a battery are wired this way:
PV is connected to the battery first, and the house is supplied from the battery.
However, most energy flow visualizations I tested — including the Home Assistant Energy Dashboard — assume a direct PV → house path and cannot represent this topology.

Request:
Option to disable PV → house and allow explicit flow definition:

• pv → battery
• battery → house
• grid → house
• house → grid

This would allow accurate visualization for systems where PV always charges the battery first and the house is supplied via the battery.