Add support for generating sankey diagram

[matth1again]

Is it possible to expose the following values to Home Assistant?

Could be used with the sankey-chart to recreate the sankey diagram

[TypQxQ]

No. All available values are already available. Those can be estimated out from the available values.

[matth1again]

Thanks

[Q-Claw]

Yes — you can build a Sankey using values that already exist in the integration (no new Modbus regs needed), by deriving the individual “flows” with template sensors.

At plant level you already have (names may vary slightly):

• Total Load Power: plant_total_load_power
• PV Power: plant_sigen_photovoltaic_power + plant_third_party_photovoltaic_power (sum = total PV)
• Grid Active Power: plant_grid_sensor_active_power (typically signed: +import / -export)
• Battery Power: plant_ess_power (typically signed: +charge / -discharge)

From those you can create signed-split sensors:

• grid_import = max(grid_power, 0)
• grid_export = max(-grid_power, 0)
• battery_charge = max(batt_power, 0)
• battery_discharge = max(-batt_power, 0)
• pv_total = pv_sigen + pv_third_party

Then a reasonable decomposition for the Sankey flows (power-balance based) is:

• PV → Load = max(load - grid_import - battery_discharge, 0)
• Battery → Grid = min(battery_discharge, grid_export)
• Battery → Load = battery_discharge - battery_to_grid
• PV → Grid = grid_export (assuming the only export path is via grid coupling)
• PV → Battery: estimate PV surplus after serving load+export:
  • pv_surplus_for_batt = max(pv_total - pv_to_load - pv_to_grid, 0)
  • pv_to_battery = min(pv_surplus_for_batt, battery_charge)
• Grid → Battery = battery_charge - pv_to_battery
• Grid → Load = grid_import - grid_to_battery

This won’t be perfect in every topology (e.g., if battery can charge from PV while grid also exports, or if the sign conventions differ), but it matches the typical on-grid energy balance and works well for Sankey visualization.

If you confirm the sign conventions for plant_grid_sensor_active_power and plant_ess_power (positive meaning import/charge), I can post a ready-to-paste Home Assistant template: YAML example tailored to the integration entity_ids.

[matth1again]

plant_grid_sensor_active_power is negative when exporting solar to the grid, however there is also a plant_grid_export_power that is a unsigned and seems to only record the grid export (0 when not exporting)

I can't see a plant_ess_power, but have plant_battery_power, with negative sign when battery is discharging, and positive sign when being charged.