feat: Direktvermarktung mit Batterie-Netzeinspeisung

Fügt einen Direktvermarktungs-Modus (feedintariff.direct_marketing_enabled)
hinzu, der den Börsenpreis als Einspeisevergütung nutzt und aktive
Batterie-Entladung ins Netz (battery_grid_export_allowed) sowie
DC-Charge-Bypass optimiert.

- FeedInTariffEnergyCharts-Provider (Börsen-Einspeisetarif inkl. Prognose)
- Inverter: DC/AC-Wirkungsgrade und Batterie-Grid-Export in process_energy
- Genetik: Export-/DC-Charge-Zustände, Restwert-Bewertung des Akkus
- Solution-Result: neues Feld Feed_in_tariff (verwendeter Tarif je Stunde)
- Tests für neue Provider, Solution und Simulation

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/_generated/configexample.md

@@ -122,9 +122,11 @@
            "mode": "OPTIMIZATION"
        },
        "feedintariff": {
+           "direct_marketing_enabled": false,
            "provider": "FeedInTariffFixed",
            "provider_settings": {
                "FeedInTariffFixed": null,
+               "FeedInTariffEnergyCharts": null,
                "FeedInTariffImport": null
            }
        },

docs/_generated/configfeedintariff.md

@@ -7,6 +7,7 @@
 
 | Name | Environment Variable | Type | Read-Only | Default | Description |
 | ---- | -------------------- | ---- | --------- | ------- | ----------- |
+| direct_marketing_enabled | `EOS_FEEDINTARIFF__DIRECT_MARKETING_ENABLED` | `bool` | `rw` | `False` | Use the electricity market price as feed-in tariff and enable export-aware direct marketing optimization. |
 | provider | `EOS_FEEDINTARIFF__PROVIDER` | `Optional[str]` | `rw` | `None` | Feed in tariff provider id of provider to be used. |
 | provider_settings | `EOS_FEEDINTARIFF__PROVIDER_SETTINGS` | `FeedInTariffCommonProviderSettings` | `rw` | `required` | Provider settings |
 | providers | | `list[str]` | `ro` | `N/A` | Available feed in tariff provider ids. |
@@ -21,9 +22,11 @@
 ```json
    {
        "feedintariff": {
+           "direct_marketing_enabled": false,
            "provider": "FeedInTariffFixed",
            "provider_settings": {
                "FeedInTariffFixed": null,
+               "FeedInTariffEnergyCharts": null,
                "FeedInTariffImport": null
            }
        }
@@ -39,12 +42,15 @@
 ```json
    {
        "feedintariff": {
+           "direct_marketing_enabled": false,
            "provider": "FeedInTariffFixed",
            "provider_settings": {
                "FeedInTariffFixed": null,
+               "FeedInTariffEnergyCharts": null,
                "FeedInTariffImport": null
            },
            "providers": [
+               "FeedInTariffEnergyCharts",
                "FeedInTariffFixed",
                "FeedInTariffImport"
            ]
@@ -86,6 +92,37 @@
 ```
 <!-- pyml enable line-length -->
 
+### Common settings for Energy-Charts feed-in tariff provider
+
+<!-- pyml disable line-length -->
+:::{table} feedintariff::provider_settings::FeedInTariffEnergyCharts
+:widths: 10 10 5 5 30
+:align: left
+
+| Name | Type | Read-Only | Default | Description |
+| ---- | ---- | --------- | ------- | ----------- |
+| bidding_zone | `<enum 'EnergyChartsBiddingZones'>` | `rw` | `DE-LU` | Bidding Zone: 'AT', 'BE', 'CH', 'CZ', 'DE-LU', 'DE-AT-LU', 'DK1', 'DK2', 'FR', 'HU', 'IT-NORTH', 'NL', 'NO2', 'PL', 'SE4' or 'SI' |
+:::
+<!-- pyml enable line-length -->
+
+<!-- pyml disable no-emphasis-as-heading -->
+**Example Input/Output**
+<!-- pyml enable no-emphasis-as-heading -->
+
+<!-- pyml disable line-length -->
+```json
+   {
+       "feedintariff": {
+           "provider_settings": {
+               "FeedInTariffEnergyCharts": {
+                   "bidding_zone": "DE-LU"
+               }
+           }
+       }
+   }
+```
+<!-- pyml enable line-length -->
+
 ### Common settings for elecprice fixed price
 
 <!-- pyml disable line-length -->
@@ -126,6 +163,7 @@
 
 | Name | Type | Read-Only | Default | Description |
 | ---- | ---- | --------- | ------- | ----------- |
+| FeedInTariffEnergyCharts | `Optional[akkudoktoreos.prediction.feedintariffenergycharts.FeedInTariffEnergyChartsCommonSettings]` | `rw` | `None` | FeedInTariffEnergyCharts settings |
 | FeedInTariffFixed | `Optional[akkudoktoreos.prediction.feedintarifffixed.FeedInTariffFixedCommonSettings]` | `rw` | `None` | FeedInTariffFixed settings |
 | FeedInTariffImport | `Optional[akkudoktoreos.prediction.feedintariffimport.FeedInTariffImportCommonSettings]` | `rw` | `None` | FeedInTariffImport settings |
 :::
@@ -141,6 +179,7 @@
        "feedintariff": {
            "provider_settings": {
                "FeedInTariffFixed": null,
+               "FeedInTariffEnergyCharts": null,
                "FeedInTariffImport": null
            }
        }

docs/akkudoktoreos/optimpost.md

@@ -262,6 +262,7 @@ smaller values (e.g. `0.0`) disable the penalty entirely.
     "ac_charge": [0.625, 0, ..., 0.75, 0],
     "dc_charge": [1, 1, ..., 1, 1],
     "discharge_allowed": [0, 0, 1, ..., 0, 0],
+    "battery_grid_export_allowed": [0, 0, 0, ..., 1, 0],
     "eautocharge_hours_float": [0.625, 0, ..., 0.75, 0],
     "result": {
         "Last_Wh_pro_Stunde": [...],
@@ -282,7 +283,8 @@ smaller values (e.g. `0.0`) disable the penalty entirely.
 
 - `ac_charge`: Grid charging schedule (0.0-1.0)
 - `dc_charge`: DC charging schedule (0-1)
-- `discharge_allowed`: Discharge permission (0 or 1)
+- `discharge_allowed`: Battery discharge permission for local self-consumption/load coverage (0 or 1)
+- `battery_grid_export_allowed`: Battery discharge permission for grid export/direct marketing (0 or 1)
 
 0 (no charge)
 1 (charge with full load)

openapi.json

@@ -8,7 +8,7 @@
       "name": "Apache 2.0",
       "url": "https://www.apache.org/licenses/LICENSE-2.0.html"
     },
-    "version": "v0.3.0.dev2607071966322885"
+    "version": "v0.3.0.dev2607101210858200"
   },
   "paths": {
     "/v1/admin/cache/clear": {
@@ -3621,7 +3621,7 @@
               }
             ],
             "title": "Home Id",
-            "description": "Tibber home id to read prices from.",
+            "description": "Optional Tibber home id. If omitted, the first home with a subscription is used.",
             "examples": [
               "00000000-0000-0000-0000-000000000000"
             ]
@@ -4283,6 +4283,20 @@
               null
             ]
           },
+          "FeedInTariffEnergyCharts": {
+            "anyOf": [
+              {
+                "$ref": "#/components/schemas/FeedInTariffEnergyChartsCommonSettings"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "description": "FeedInTariffEnergyCharts settings",
+            "examples": [
+              null
+            ]
+          },
           "FeedInTariffImport": {
             "anyOf": [
               {
@@ -4304,6 +4318,16 @@
       },
       "FeedInTariffCommonSettings-Input": {
         "properties": {
+          "direct_marketing_enabled": {
+            "type": "boolean",
+            "title": "Direct Marketing Enabled",
+            "description": "Use the electricity market price as feed-in tariff and enable export-aware direct marketing optimization.",
+            "default": false,
+            "examples": [
+              false,
+              true
+            ]
+          },
           "provider": {
             "anyOf": [
               {
@@ -4317,7 +4341,8 @@
             "description": "Feed in tariff provider id of provider to be used.",
             "examples": [
               "FeedInTariffFixed",
-              "FeedInTarifImport"
+              "FeedInTariffEnergyCharts",
+              "FeedInTariffImport"
             ]
           },
           "provider_settings": {
@@ -4334,6 +4359,16 @@
       },
       "FeedInTariffCommonSettings-Output": {
         "properties": {
+          "direct_marketing_enabled": {
+            "type": "boolean",
+            "title": "Direct Marketing Enabled",
+            "description": "Use the electricity market price as feed-in tariff and enable export-aware direct marketing optimization.",
+            "default": false,
+            "examples": [
+              false,
+              true
+            ]
+          },
           "provider": {
             "anyOf": [
               {
@@ -4347,7 +4382,8 @@
             "description": "Feed in tariff provider id of provider to be used.",
             "examples": [
               "FeedInTariffFixed",
-              "FeedInTarifImport"
+              "FeedInTariffEnergyCharts",
+              "FeedInTariffImport"
             ]
           },
           "provider_settings": {
@@ -4374,6 +4410,21 @@
         "title": "FeedInTariffCommonSettings",
         "description": "Feed In Tariff Prediction Configuration."
       },
+      "FeedInTariffEnergyChartsCommonSettings": {
+        "properties": {
+          "bidding_zone": {
+            "$ref": "#/components/schemas/EnergyChartsBiddingZones",
+            "description": "Bidding Zone: 'AT', 'BE', 'CH', 'CZ', 'DE-LU', 'DE-AT-LU', 'DK1', 'DK2', 'FR', 'HU', 'IT-NORTH', 'NL', 'NO2', 'PL', 'SE4' or 'SI'",
+            "default": "DE-LU",
+            "examples": [
+              "DE-LU"
+            ]
+          }
+        },
+        "type": "object",
+        "title": "FeedInTariffEnergyChartsCommonSettings",
+        "description": "Common settings for Energy-Charts feed-in tariff provider."
+      },
       "FeedInTariffFixedCommonSettings": {
         "properties": {
           "feed_in_tariff_kwh": {
@@ -5107,7 +5158,15 @@
             },
             "type": "array",
             "title": "Discharge Allowed",
-            "description": "Array with discharge values (1 for discharge, 0 otherwise)."
+            "description": "Array with self-consumption discharge values (1 for discharge, 0 otherwise)."
+          },
+          "battery_grid_export_allowed": {
+            "items": {
+              "type": "integer"
+            },
+            "type": "array",
+            "title": "Battery Grid Export Allowed",
+            "description": "Array with battery-to-grid export values (1 for export discharge, 0 otherwise)."
           },
           "eautocharge_hours_float": {
             "anyOf": [

src/akkudoktoreos/devices/genetic/inverter.py

@@ -30,8 +30,23 @@ class Inverter:
         self.ac_to_dc_efficiency = self.parameters.ac_to_dc_efficiency
         self.max_ac_charge_power_w = self.parameters.max_ac_charge_power_w
 
+    def _discharge_battery_to_ac(self, requested_ac_wh: float, hour: int) -> tuple[float, float]:
+        """Discharge battery energy and convert it to AC energy."""
+        if not self.battery or requested_ac_wh <= 0.0:
+            return 0.0, 0.0
+
+        dc_request = requested_ac_wh / self.dc_to_ac_efficiency
+        battery_discharge_dc, discharge_losses = self.battery.discharge_energy(dc_request, hour)
+        battery_discharge_ac = battery_discharge_dc * self.dc_to_ac_efficiency
+        inverter_discharge_losses = battery_discharge_dc - battery_discharge_ac
+        return battery_discharge_ac, discharge_losses + inverter_discharge_losses
+
     def process_energy(
-        self, generation: float, consumption: float, hour: int
+        self,
+        generation: float,
+        consumption: float,
+        hour: int,
+        allow_battery_grid_export: bool = False,
     ) -> tuple[float, float, float, float]:
         losses = 0.0
         grid_export = 0.0
@@ -59,6 +74,7 @@ class Inverter:
                 # Remaining load Self Consumption not perfect
                 remaining_load_evq = (generation - consumption) * (1.0 - scr)
 
+                from_battery_dc = 0.0
                 if remaining_load_evq > 0:
                     # Akku muss den Restverbrauch decken
                     if self.battery:
@@ -105,6 +121,20 @@ class Inverter:
                     consumption + from_battery_ac
                 )  # Self-consumption is equal to the load
 
+                if allow_battery_grid_export and self.battery:
+                    export_capacity = max(self.max_power_wh - consumption - grid_export, 0.0)
+                    max_discharge_dc = getattr(self.battery, "max_charge_power_w", None)
+                    if max_discharge_dc is not None:
+                        remaining_battery_ac = max(
+                            (max_discharge_dc - from_battery_dc) * dc_to_ac_eff, 0.0
+                        )
+                        export_capacity = min(export_capacity, remaining_battery_ac)
+                    battery_export_ac, battery_export_losses = self._discharge_battery_to_ac(
+                        export_capacity, hour
+                    )
+                    grid_export += battery_export_ac
+                    losses += battery_export_losses
+
         else:
             # Case 2: Insufficient generation, cover shortfall
             shortfall = consumption - generation
@@ -129,4 +159,18 @@ class Inverter:
             grid_import = shortfall - battery_discharge_ac
             self_consumption = generation + battery_discharge_ac
 
+            if allow_battery_grid_export and self.battery and grid_import <= 0.0:
+                export_capacity = max(self.max_power_wh - consumption, 0.0)
+                max_discharge_dc = getattr(self.battery, "max_charge_power_w", None)
+                if max_discharge_dc is not None:
+                    remaining_battery_ac = max(
+                        (max_discharge_dc - battery_discharge_dc) * dc_to_ac_eff, 0.0
+                    )
+                    export_capacity = min(export_capacity, remaining_battery_ac)
+                battery_export_ac, battery_export_losses = self._discharge_battery_to_ac(
+                    export_capacity, hour
+                )
+                grid_export += battery_export_ac
+                losses += battery_export_losses
+
         return grid_export, grid_import, losses, self_consumption

src/akkudoktoreos/optimization/genetic/genetic.py

@@ -76,7 +76,12 @@ class GeneticSimulation(PydanticBaseModel):
             "description": "An array of floats representing the feed-in compensation in euros per watt-hour."
         },
     )
-
+    direct_marketing_enabled: bool = Field(
+        default=False,
+        json_schema_extra={
+            "description": "Use direct marketing behavior for feed-in/export decisions."
+        },
+    )
     battery: Optional[Battery] = Field(default=None, json_schema_extra={"description": "TBD."})
     ev: Optional[Battery] = Field(default=None, json_schema_extra={"description": "TBD."})
     home_appliance: Optional[HomeAppliance] = Field(
@@ -93,6 +98,12 @@ class GeneticSimulation(PydanticBaseModel):
     bat_discharge_hours: Optional[NDArray[Shape["*"], float]] = Field(
         default=None, json_schema_extra={"description": "TBD"}
     )
+    bat_grid_export_hours: Optional[NDArray[Shape["*"], float]] = Field(
+        default=None,
+        json_schema_extra={
+            "description": "Hourly permission for battery discharge into the grid."
+        },
+    )
     ev_charge_hours: Optional[NDArray[Shape["*"], float]] = Field(
         default=None, json_schema_extra={"description": "TBD"}
     )
@@ -112,6 +123,7 @@ class GeneticSimulation(PydanticBaseModel):
         ev: Optional[Battery] = None,
         home_appliance: Optional[HomeAppliance] = None,
         inverter: Optional[Inverter] = None,
+        direct_marketing_enabled: bool = False,
     ) -> None:
         """Prepare simulation runs.
 
@@ -119,13 +131,14 @@ class GeneticSimulation(PydanticBaseModel):
         """
         self.optimization_hours = optimization_hours
         self.prediction_hours = prediction_hours
+        self.direct_marketing_enabled = direct_marketing_enabled
 
         # Load arrays from provided EMS parameters
         self.load_energy_array = np.array(parameters.gesamtlast, float)
         self.pv_prediction_wh = np.array(parameters.pv_prognose_wh, float)
         self.elect_price_hourly = np.array(parameters.strompreis_euro_pro_wh, float)
         self.elect_revenue_per_hour_arr = (
-            parameters.einspeiseverguetung_euro_pro_wh
+            np.array(parameters.einspeiseverguetung_euro_pro_wh, float)
             if isinstance(parameters.einspeiseverguetung_euro_pro_wh, list)
             else np.full(
                 len(self.load_energy_array), parameters.einspeiseverguetung_euro_pro_wh, float
@@ -145,6 +158,7 @@ class GeneticSimulation(PydanticBaseModel):
         self.ac_charge_hours = np.full(self.prediction_hours, 0.0)
         self.dc_charge_hours = np.full(self.prediction_hours, 0.0)
         self.bat_discharge_hours = np.full(self.prediction_hours, 0.0)
+        self.bat_grid_export_hours = np.full(self.prediction_hours, 0.0)
         self.ev_charge_hours = np.full(self.prediction_hours, 0.0)
         self.ev_discharge_hours = np.full(self.prediction_hours, 0.0)
         self.home_appliance_start_hour = None
@@ -172,6 +186,7 @@ class GeneticSimulation(PydanticBaseModel):
         ac_charge_hours_fast = self.ac_charge_hours
         dc_charge_hours_fast = self.dc_charge_hours
         bat_discharge_hours_fast = self.bat_discharge_hours
+        bat_grid_export_hours_fast = self.bat_grid_export_hours
         elect_price_hourly_fast = self.elect_price_hourly
         elect_revenue_per_hour_arr_fast = self.elect_revenue_per_hour_arr
         pv_prediction_wh_fast = self.pv_prediction_wh
@@ -179,6 +194,7 @@ class GeneticSimulation(PydanticBaseModel):
         ev_fast = self.ev
         home_appliance_fast = self.home_appliance
         inverter_fast = self.inverter
+        direct_marketing_enabled_fast = self.direct_marketing_enabled
 
         # Check for simulation integrity (in a way that mypy understands)
         if (
@@ -190,6 +206,7 @@ class GeneticSimulation(PydanticBaseModel):
             or dc_charge_hours_fast is None
             or elect_revenue_per_hour_arr_fast is None
             or bat_discharge_hours_fast is None
+            or bat_grid_export_hours_fast is None
             or ev_discharge_hours_fast is None
         ):
             missing = []
@@ -209,6 +226,8 @@ class GeneticSimulation(PydanticBaseModel):
                 missing.append("Electricity Revenue Per Hour")
             if bat_discharge_hours_fast is None:
                 missing.append("Battery Discharge Hours")
+            if bat_grid_export_hours_fast is None:
+                missing.append("Battery Grid Export Hours")
             if ev_discharge_hours_fast is None:
                 missing.append("EV Discharge Hours")
             msg = ", ".join(missing)
@@ -235,6 +254,7 @@ class GeneticSimulation(PydanticBaseModel):
         revenue_per_hour = np.full((total_hours), np.nan)
         losses_wh_per_hour = np.full((total_hours), np.nan)
         electricity_price_per_hour = np.full((total_hours), np.nan)
+        feed_in_tariff_per_hour = np.full((total_hours), np.nan)
 
         # Set initial state
         if battery_fast:
@@ -272,7 +292,18 @@ class GeneticSimulation(PydanticBaseModel):
             # Fill the discharge array of the battery
             bat_discharge_hours_fast[0:start_hour] = 0
             bat_discharge_hours_fast[end_hour:] = 0
-            battery_fast.discharge_array = bat_discharge_hours_fast
+            bat_grid_export_hours_fast[0:start_hour] = 0
+            bat_grid_export_hours_fast[end_hour:] = 0
+            battery_fast.discharge_array = np.where(
+                (bat_discharge_hours_fast > 0)
+                | (
+                    direct_marketing_enabled_fast
+                    & (bat_grid_export_hours_fast > 0)
+                    & (elect_revenue_per_hour_arr_fast > 0.0)
+                ),
+                1,
+                0,
+            )
         else:
             # Default return if no battery is available
             soc_per_hour = np.full((total_hours), 0)
@@ -348,12 +379,25 @@ class GeneticSimulation(PydanticBaseModel):
 
             if inverter_fast:
                 energy_produced = pv_prediction_wh_fast[hour]
+                hourly_feed_in_tariff = elect_revenue_per_hour_arr_fast[hour]
+                battery_grid_export_allowed = (
+                    direct_marketing_enabled_fast
+                    and hourly_feed_in_tariff > 0.0
+                    and bat_grid_export_hours_fast[hour] > 0
+                )
                 (
                     energy_feedin_grid_actual,
                     energy_consumption_grid_actual,
                     losses,
                     eigenverbrauch,
-                ) = inverter_fast.process_energy(energy_produced, consumption, hour)
+                ) = inverter_fast.process_energy(
+                    energy_produced,
+                    consumption,
+                    hour,
+                    allow_battery_grid_export=battery_grid_export_allowed,
+                )
+            else:
+                hourly_feed_in_tariff = elect_revenue_per_hour_arr_fast[hour]
 
             # AC PV Battery Charge
             if battery_fast:
@@ -391,17 +435,26 @@ class GeneticSimulation(PydanticBaseModel):
                         )
 
             # Update hourly arrays
+            if (
+                direct_marketing_enabled_fast
+                and hourly_feed_in_tariff < 0.0
+                and energy_feedin_grid_actual > 0.0
+            ):
+                losses_wh_per_hour[hour_idx] += energy_feedin_grid_actual
+                energy_feedin_grid_actual = 0.0
+
             feedin_energy_per_hour[hour_idx] = energy_feedin_grid_actual
             consumption_energy_per_hour[hour_idx] = energy_consumption_grid_actual
             losses_wh_per_hour[hour_idx] += losses
             loads_energy_per_hour[hour_idx] = consumption
             hourly_electricity_price = elect_price_hourly_fast[hour]
             electricity_price_per_hour[hour_idx] = hourly_electricity_price
+            feed_in_tariff_per_hour[hour_idx] = hourly_feed_in_tariff
 
             # Financial calculations
             costs_per_hour[hour_idx] = energy_consumption_grid_actual * hourly_electricity_price
             revenue_per_hour[hour_idx] = (
-                energy_feedin_grid_actual * elect_revenue_per_hour_arr_fast[hour]
+                energy_feedin_grid_actual * hourly_feed_in_tariff
             )
 
         total_cost = np.nansum(costs_per_hour)
@@ -424,6 +477,7 @@ class GeneticSimulation(PydanticBaseModel):
             "Gesamt_Verluste": total_losses,
             "Home_appliance_wh_per_hour": home_appliance_wh_per_hour,
             "Electricity_price": electricity_price_per_hour,
+            "Feed_in_tariff": feed_in_tariff_per_hour,
         }
 
 
@@ -448,6 +502,7 @@ class GeneticOptimization(OptimizationBase):
         self.fix_seed = fixed_seed
         self.optimize_ev = True
         self.optimize_dc_charge = False
+        self.optimize_battery_grid_export = False
         self.fitness_history: dict[str, Any] = {}
 
         # Set a fixed seed for random operations if provided or in debug mode
@@ -460,10 +515,42 @@ class GeneticOptimization(OptimizationBase):
         # Create Simulation
         self.simulation = GeneticSimulation()
 
+    def _direct_marketing_enabled(self) -> bool:
+        """Return whether direct marketing mode is enabled in configuration."""
+        try:
+            return bool(self.config.feedintariff.direct_marketing_enabled)
+        except Exception:
+            return False
+
+    def _parameters_for_config(
+        self, parameters: GeneticOptimizationParameters
+    ) -> GeneticOptimizationParameters:
+        """Apply configuration-derived parameter overrides before optimization."""
+        if not self._direct_marketing_enabled():
+            return parameters
+
+        feed_in_tariff = parameters.ems.einspeiseverguetung_euro_pro_wh
+        if (
+            isinstance(feed_in_tariff, list)
+            and len(feed_in_tariff) == len(parameters.ems.strompreis_euro_pro_wh)
+            and len(set(feed_in_tariff)) > 1
+        ):
+            return parameters
+
+        ems_parameters = parameters.ems.model_copy(
+            update={
+                "einspeiseverguetung_euro_pro_wh": list(
+                    parameters.ems.strompreis_euro_pro_wh
+                )
+            },
+            deep=True,
+        )
+        return parameters.model_copy(update={"ems": ems_parameters}, deep=True)
+
     def decode_charge_discharge(
         self, discharge_hours_bin: np.ndarray
-    ) -> tuple[np.ndarray, np.ndarray, np.ndarray]:
+    ) -> tuple[np.ndarray, np.ndarray, np.ndarray, np.ndarray]:
-        """Decode the input array into ac_charge, dc_charge, and discharge arrays."""
+        """Decode the input array into charge, self-consumption discharge and export arrays."""
         discharge_hours_bin_np = np.array(discharge_hours_bin)
         # Battery AC charge uses its own charge-level list (bat_possible_charge_values).
         len_bat = len(self.bat_possible_charge_values)
@@ -473,6 +560,7 @@ class GeneticOptimization(OptimizationBase):
         # Discharge:  len_bat .. 2*len_bat - 1
         # AC Charge:  2*len_bat .. 3*len_bat - 1  (maps to bat_possible_charge_values)
         # DC optional: 3*len_bat (not allowed), 3*len_bat + 1 (allowed)
+        # Grid export: next state, if direct marketing/export optimization is enabled
 
         # Idle states
         idle_mask = (discharge_hours_bin_np >= 0) & (discharge_hours_bin_np < len_bat)
@@ -501,9 +589,14 @@ class GeneticOptimization(OptimizationBase):
         ac_charge = np.zeros_like(discharge_hours_bin_np, dtype=float)
         ac_charge[ac_mask] = [self.bat_possible_charge_values[i] for i in ac_indices]
 
+        battery_grid_export = np.zeros_like(discharge_hours_bin_np, dtype=int)
+        if self.optimize_battery_grid_export:
+            grid_export_state = 3 * len_bat + (2 if self.optimize_dc_charge else 0)
+            battery_grid_export = np.where(discharge_hours_bin_np == grid_export_state, 1, 0)
+
         # Idle is just 0, already default.
 
-        return ac_charge, dc_charge, discharge
+        return ac_charge, dc_charge, discharge, battery_grid_export
 
     def mutate(self, individual: list[int]) -> tuple[list[int]]:
         """Custom mutation function for the individual."""
@@ -513,6 +606,8 @@ class GeneticOptimization(OptimizationBase):
             total_states = 3 * len_bat + 2
         else:
             total_states = 3 * len_bat
+        if self.optimize_battery_grid_export:
+            total_states += 1
 
         # 1. Mutating the charge_discharge part
         charge_discharge_part = individual[: self.config.prediction.hours]
@@ -652,10 +747,13 @@ class GeneticOptimization(OptimizationBase):
         # Discharge: len_bat states
         # AC-Charge: len_bat states  (maps to bat_possible_charge_values)
         # With DC: + 2 additional states
+        # With battery grid export: + 1 additional state
         if self.optimize_dc_charge:
             total_states = 3 * len_bat + 2
         else:
             total_states = 3 * len_bat
+        if self.optimize_battery_grid_export:
+            total_states += 1
 
         # State space: 0 .. (total_states - 1)
         self.toolbox.register("attr_discharge_state", random.randint, 0, total_states - 1)
@@ -711,11 +809,12 @@ class GeneticOptimization(OptimizationBase):
             # Set start hour for appliance
             self.simulation.home_appliance_start_hour = washingstart_int
 
-        ac_charge_hours, dc_charge_hours, discharge = self.decode_charge_discharge(
+        ac_charge_hours, dc_charge_hours, discharge, battery_grid_export = (
-            discharge_hours_bin
+            self.decode_charge_discharge(discharge_hours_bin)
         )
 
         self.simulation.bat_discharge_hours = discharge
+        self.simulation.bat_grid_export_hours = battery_grid_export
         # Set DC charge hours only if DC optimization is enabled
         if self.optimize_dc_charge:
             self.simulation.dc_charge_hours = dc_charge_hours
@@ -1077,6 +1176,11 @@ class GeneticOptimization(OptimizationBase):
         ngen: Optional[int] = None,
     ) -> GeneticSolution:
         """Perform EMS (Energy Management System) optimization and visualize results."""
+        direct_marketing_enabled = self._direct_marketing_enabled()
+        parameters = self._parameters_for_config(parameters)
+        self.optimize_dc_charge = direct_marketing_enabled
+        self.optimize_battery_grid_export = direct_marketing_enabled
+
         if start_hour is None:
             start_hour = self.ems.start_datetime.hour
         # Start hour has to be in sync with energy management
@@ -1094,10 +1198,6 @@ class GeneticOptimization(OptimizationBase):
                 generations = 400
                 logger.error("Generations not configured. Using {}.", generations)
 
-        einspeiseverguetung_euro_pro_wh = np.full(
-            self.config.prediction.hours, parameters.ems.einspeiseverguetung_euro_pro_wh
-        )
-
         self.simulation.reset()
 
         # Initialize PV and EV batteries
@@ -1195,6 +1295,7 @@ class GeneticOptimization(OptimizationBase):
             inverter=inverter,  # battery is part of inverter
             ev=eauto,
             home_appliance=dishwasher,
+            direct_marketing_enabled=direct_marketing_enabled,
         )
 
         # Setup the DEAP environment and optimization process
@@ -1240,6 +1341,11 @@ class GeneticOptimization(OptimizationBase):
             discharge = []
         else:
             discharge = discharge.tolist()
+        battery_grid_export = self.simulation.bat_grid_export_hours
+        if not direct_marketing_enabled or battery_grid_export is None:
+            battery_grid_export = []
+        else:
+            battery_grid_export = battery_grid_export.tolist()
 
         # Visualize the results in PDF
         try:
@@ -1249,6 +1355,7 @@ class GeneticOptimization(OptimizationBase):
                 "ac_charge": ac_charge_hours,
                 "dc_charge": dc_charge_hours,
                 "discharge_allowed": discharge,
+                "battery_grid_export_allowed": battery_grid_export,
                 "eautocharge_hours_float": eautocharge_hours_float,
                 "result": simulation_result,
                 "eauto_obj": self.simulation.ev.to_dict() if self.simulation.ev else None,
@@ -1270,6 +1377,7 @@ class GeneticOptimization(OptimizationBase):
                 "ac_charge": ac_charge_hours,
                 "dc_charge": dc_charge_hours,
                 "discharge_allowed": discharge,
+                "battery_grid_export_allowed": battery_grid_export,
                 "eautocharge_hours_float": eautocharge_hours_float,
                 "result": GeneticSimulationResult(**simulation_result),
                 "eauto_obj": self.simulation.ev,

src/akkudoktoreos/optimization/genetic/geneticparams.py

@@ -330,33 +330,48 @@ class GeneticOptimizationParameters(
                 )
                 # Retry
                 continue
-            try:
+            if cls.config.feedintariff.direct_marketing_enabled:
-                feed_in_tariff_wh = cls.prediction.key_to_array(
+                if cls.config.feedintariff.provider == "FeedInTariffEnergyCharts":
-                    key="feed_in_tariff_wh",
+                    try:
-                    start_datetime=parameter_start_datetime,
+                        feed_in_tariff_wh = cls.prediction.key_to_array(
-                    end_datetime=parameter_end_datetime,
+                            key="feed_in_tariff_wh",
-                    interval=interval,
+                            start_datetime=parameter_start_datetime,
-                    fill_method="ffill",
+                            end_datetime=parameter_end_datetime,
-                ).tolist()
+                            interval=interval,
-            except:
+                            fill_method="ffill",
-                logger.info(
+                        ).tolist()
-                    "No feed in tariff forecast data available - defaulting to demo data. Parameter preparation attempt {}.",
+                    except:
-                    attempt,
+                        feed_in_tariff_wh = list(elecprice_marketprice_wh)
-                )
+                else:
-                cls.config.merge_settings_from_dict(
+                    feed_in_tariff_wh = list(elecprice_marketprice_wh)
-                    {
+            else:
-                        "feedintariff": {
+                try:
-                            "provider": "FeedInTariffFixed",
+                    feed_in_tariff_wh = cls.prediction.key_to_array(
-                            "provider_settings": {
+                        key="feed_in_tariff_wh",
-                                "FeedInTariffFixed": {
+                        start_datetime=parameter_start_datetime,
-                                    "feed_in_tariff_kwh": 0.078,
+                        end_datetime=parameter_end_datetime,
+                        interval=interval,
+                        fill_method="ffill",
+                    ).tolist()
+                except:
+                    logger.info(
+                        "No feed in tariff forecast data available - defaulting to demo data. Parameter preparation attempt {}.",
+                        attempt,
+                    )
+                    cls.config.merge_settings_from_dict(
+                        {
+                            "feedintariff": {
+                                "provider": "FeedInTariffFixed",
+                                "provider_settings": {
+                                    "FeedInTariffFixed": {
+                                        "feed_in_tariff_kwh": 0.078,
+                                    },
                                 },
                             },
-                        },
+                        }
-                    }
+                    )
-                )
+                    # Retry
-                # Retry
+                    continue
-                continue
             try:
                 weather_temp_air = cls.prediction.key_to_array(
                     key="weather_temp_air",

src/akkudoktoreos/optimization/genetic/geneticsolution.py

@@ -130,6 +130,12 @@ class GeneticSimulationResult(GeneticParametersBaseModel):
     Electricity_price: list[float] = Field(
         json_schema_extra={"description": "Used Electricity Price, including predictions"}
     )
+    Feed_in_tariff: list[float] = Field(
+        default_factory=list,
+        json_schema_extra={
+            "description": "Used feed-in tariff in €/Wh per hour, including predictions"
+        },
+    )
 
     @field_validator(
         "Last_Wh_pro_Stunde",
@@ -142,6 +148,7 @@ class GeneticSimulationResult(GeneticParametersBaseModel):
         "Verluste_Pro_Stunde",
         "Home_appliance_wh_per_hour",
         "Electricity_price",
+        "Feed_in_tariff",
         mode="before",
     )
     def convert_numpy(cls, field: Any) -> Any:
@@ -163,7 +170,13 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
     )
     discharge_allowed: list[int] = Field(
         json_schema_extra={
-            "description": "Array with discharge values (1 for discharge, 0 otherwise)."
+            "description": "Array with self-consumption discharge values (1 for discharge, 0 otherwise)."
+        }
+    )
+    battery_grid_export_allowed: list[int] = Field(
+        default_factory=list,
+        json_schema_extra={
+            "description": "Array with battery-to-grid export values (1 for export discharge, 0 otherwise)."
         }
     )
     eautocharge_hours_float: Optional[list[float]] = Field(json_schema_extra={"description": "TBD"})
@@ -186,6 +199,7 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
         "ac_charge",
         "dc_charge",
         "discharge_allowed",
+        "battery_grid_export_allowed",
         mode="before",
     )
     def convert_numpy(cls, field: Any) -> Any:
@@ -226,13 +240,15 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
         ac_charge: float,
         dc_charge: float,
         discharge_allowed: bool,
+        battery_grid_export_allowed: bool = False,
     ) -> tuple[BatteryOperationMode, float]:
         """Maps low-level solution to a representative operation mode and factor.
 
         Args:
             ac_charge (float): Allowed AC-side charging power (relative units).
             dc_charge (float): Allowed DC-side charging power (relative units).
-            discharge_allowed (bool): Whether discharging is permitted.
+            discharge_allowed (bool): Whether discharging to local load is permitted.
+            battery_grid_export_allowed (bool): Whether discharge into the grid is permitted.
 
         Returns:
             tuple[BatteryOperationMode, float]: A tuple containing
@@ -240,15 +256,28 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
                 - `float`: the operation factor corresponding to the active signal.
 
         Notes:
-            - The mapping prioritizes AC charge > DC charge > discharge.
+            - Explicit grid export is separate from local-load discharge.
+            - The mapping prioritizes export > AC charge > DC charge > discharge.
             - Multiple strategies can produce the same low-level signals; this function
               returns a representative mode based on a defined priority order.
         """
         # (0,0,0) → Nothing allowed
-        if ac_charge <= 0.0 and dc_charge <= 0.0 and not discharge_allowed:
+        if (
+            ac_charge <= 0.0
+            and dc_charge <= 0.0
+            and not discharge_allowed
+            and not battery_grid_export_allowed
+        ):
             return BatteryOperationMode.IDLE, 1.0
 
-        # (0,0,1) → Discharge only
+        if battery_grid_export_allowed:
+            if ac_charge > 0.0 or dc_charge > 0.0:
+                raise ValueError(
+                    "Illegal state: battery_grid_export_allowed cannot be combined with charging"
+                )
+            return BatteryOperationMode.GRID_SUPPORT_EXPORT, 1.0
+
+        # (0,0,1) -> Discharge for local load only
         if ac_charge <= 0.0 and dc_charge <= 0.0 and discharge_allowed:
             return BatteryOperationMode.PEAK_SHAVING, 1.0
 
@@ -289,7 +318,8 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
         dc_charge: float,
         discharge_allowed: bool,
         soc_pct: float,
-    ) -> tuple[float, float, bool]:
+        battery_grid_export_allowed: bool = False,
+    ) -> tuple[float, float, bool, bool]:
         """Clamp raw genetic gene values by the battery's actual SOC at that hour.
 
         The raw gene values represent the optimizer's *intent* and are stored
@@ -305,10 +335,11 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
           - DC charge factor (PV): zeroed when battery is at or above max SOC
             (the inverter curtails automatically, but this makes intent clear).
           - Discharge: blocked when SOC is at or below min SOC.
+          - Battery grid export: blocked when SOC is at or below min SOC.
         """
         bat_list = self.config.devices.batteries
         if not bat_list:
-            return ac_charge, dc_charge, discharge_allowed
+            return ac_charge, dc_charge, discharge_allowed, battery_grid_export_allowed
 
         bat = bat_list[0]
         min_soc = float(bat.min_soc_percentage)
@@ -341,19 +372,22 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
 
         # --- Discharge: block at min SOC ---
         effective_dis = discharge_allowed and (soc_pct > min_soc)
+        effective_grid_export = battery_grid_export_allowed and (soc_pct > min_soc)
 
-        return effective_ac, effective_dc, effective_dis
+        return effective_ac, effective_dc, effective_dis, effective_grid_export
 
     def optimization_solution(self) -> OptimizationSolution:
         """Provide the genetic solution as a general optimization solution.
 
         The battery modes are controlled by the grid control triggers:
         - ac_charge: charge from grid
-        - discharge_allowed: discharge to grid
+        - discharge_allowed: discharge to local load
+        - battery_grid_export_allowed: discharge to grid
 
         The following battery modes are supported:
-        - SELF_CONSUMPTION:    ac_charge == 0 and discharge_allowed == 0
+        - SELF_CONSUMPTION:    dc_charge > 0 and discharge_allowed == 1
-        - GRID_SUPPORT_EXPORT: ac_charge == 0 and discharge_allowed == 1
+        - PEAK_SHAVING:        ac_charge == 0 and discharge_allowed == 1
+        - GRID_SUPPORT_EXPORT: battery_grid_export_allowed == 1
         - GRID_SUPPORT_IMPORT: ac_charge  > 0 and discharge_allowed == 0 or 1
         """
         start_datetime = get_ems().start_datetime
@@ -407,6 +441,7 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
             "genetic_ac_charge_factor": [],
             "genetic_dc_charge_factor": [],
             "genetic_discharge_allowed_factor": [],
+            "genetic_battery_grid_export_allowed_factor": [],
         }
         # ac_charge, dc_charge, discharge_allowed start at hour 0 of start day
         for hour_idx, rate in enumerate(self.ac_charge):
@@ -417,11 +452,19 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
             ac_charge_hour = self.ac_charge[hour_idx]
             dc_charge_hour = self.dc_charge[hour_idx]
             discharge_allowed_hour = bool(self.discharge_allowed[hour_idx])
+            battery_grid_export_allowed_hour = (
+                bool(self.battery_grid_export_allowed[hour_idx])
+                if hour_idx < len(self.battery_grid_export_allowed)
+                else False
+            )
 
             # Raw genetic gene values — optimizer intent, stored verbatim
             operation["genetic_ac_charge_factor"].append(ac_charge_hour)
             operation["genetic_dc_charge_factor"].append(dc_charge_hour)
             operation["genetic_discharge_allowed_factor"].append(float(discharge_allowed_hour))
+            operation["genetic_battery_grid_export_allowed_factor"].append(
+                float(battery_grid_export_allowed_hour)
+            )
 
             # SOC-clamped effective values — what can physically be executed at
             # this hour given the expected battery state of charge.
@@ -431,11 +474,15 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
                 if result_idx < len(self.result.akku_soc_pro_stunde)
                 else 0.0
             )
-            eff_ac, eff_dc, eff_dis = self._soc_clamped_operation_factors(
+            eff_ac, eff_dc, eff_dis, eff_grid_export = self._soc_clamped_operation_factors(
-                ac_charge_hour, dc_charge_hour, discharge_allowed_hour, soc_h_pct
+                ac_charge_hour,
+                dc_charge_hour,
+                discharge_allowed_hour,
+                soc_h_pct,
+                battery_grid_export_allowed_hour,
             )
             operation_mode, operation_mode_factor = self._battery_operation_from_solution(
-                eff_ac, eff_dc, eff_dis
+                eff_ac, eff_dc, eff_dis, eff_grid_export
             )
             for mode in BatteryOperationMode:
                 mode_key = f"{battery_device_id}_{mode.lower()}_op_mode"
@@ -671,14 +718,20 @@ class GeneticSolution(ConfigMixin, GeneticParametersBaseModel):
                 if result_idx < len(self.result.akku_soc_pro_stunde)
                 else 0.0
             )
-            eff_ac, eff_dc, eff_dis = self._soc_clamped_operation_factors(
+            battery_grid_export_allowed_hour = (
+                bool(self.battery_grid_export_allowed[hour_idx])
+                if hour_idx < len(self.battery_grid_export_allowed)
+                else False
+            )
+            eff_ac, eff_dc, eff_dis, eff_grid_export = self._soc_clamped_operation_factors(
                 self.ac_charge[hour_idx],
                 self.dc_charge[hour_idx],
                 bool(self.discharge_allowed[hour_idx]),
                 soc_h_pct,
+                battery_grid_export_allowed_hour,
             )
             operation_mode, operation_mode_factor = self._battery_operation_from_solution(
-                eff_ac, eff_dc, eff_dis
+                eff_ac, eff_dc, eff_dis, eff_grid_export
             )
             if (
                 operation_mode == last_operation_mode

src/akkudoktoreos/prediction/feedintariff.py

@@ -5,6 +5,9 @@ from pydantic import Field, computed_field, field_validator
 from akkudoktoreos.config.configabc import SettingsBaseModel
 from akkudoktoreos.core.coreabc import get_prediction
 from akkudoktoreos.prediction.feedintariffabc import FeedInTariffProvider
+from akkudoktoreos.prediction.feedintariffenergycharts import (
+    FeedInTariffEnergyChartsCommonSettings,
+)
 from akkudoktoreos.prediction.feedintarifffixed import FeedInTariffFixedCommonSettings
 from akkudoktoreos.prediction.feedintariffimport import FeedInTariffImportCommonSettings
 
@@ -16,7 +19,7 @@ def elecprice_provider_ids() -> list[str]:
     except:
         # Prediction may not be initialized
         # Return at least provider used in example
-        return ["FeedInTariffFixed", "FeedInTarifImport"]
+        return ["FeedInTariffFixed", "FeedInTariffEnergyCharts", "FeedInTariffImport"]
 
     return [
         provider.provider_id()
@@ -32,6 +35,10 @@ class FeedInTariffCommonProviderSettings(SettingsBaseModel):
         default=None,
         json_schema_extra={"description": "FeedInTariffFixed settings", "examples": [None]},
     )
+    FeedInTariffEnergyCharts: Optional[FeedInTariffEnergyChartsCommonSettings] = Field(
+        default=None,
+        json_schema_extra={"description": "FeedInTariffEnergyCharts settings", "examples": [None]},
+    )
     FeedInTariffImport: Optional[FeedInTariffImportCommonSettings] = Field(
         default=None,
         json_schema_extra={"description": "FeedInTariffImport settings", "examples": [None]},
@@ -41,11 +48,23 @@ class FeedInTariffCommonProviderSettings(SettingsBaseModel):
 class FeedInTariffCommonSettings(SettingsBaseModel):
     """Feed In Tariff Prediction Configuration."""
 
+    direct_marketing_enabled: bool = Field(
+        default=False,
+        json_schema_extra={
+            "description": "Use the electricity market price as feed-in tariff and enable export-aware direct marketing optimization.",
+            "examples": [False, True],
+        },
+    )
+
     provider: Optional[str] = Field(
         default=None,
         json_schema_extra={
             "description": "Feed in tariff provider id of provider to be used.",
-            "examples": ["FeedInTariffFixed", "FeedInTarifImport"],
+            "examples": [
+                "FeedInTariffFixed",
+                "FeedInTariffEnergyCharts",
+                "FeedInTariffImport",
+            ],
         },
     )
 
@@ -57,6 +76,7 @@ class FeedInTariffCommonSettings(SettingsBaseModel):
                 # Example 1: Empty/default settings (all providers None)
                 {
                     "FeedInTariffFixed": None,
+                    "FeedInTariffEnergyCharts": None,
                     "FeedInTariffImport": None,
                 },
             ],

src/akkudoktoreos/prediction/feedintariffenergycharts.py

@@ -0,0 +1,179 @@
+"""Provides feed-in tariff data from Energy-Charts market prices."""
+
+from datetime import datetime
+from typing import Optional
+
+import pandas as pd
+import requests
+from loguru import logger
+from pydantic import Field
+
+from akkudoktoreos.config.configabc import SettingsBaseModel
+from akkudoktoreos.core.cache import cache_in_file
+from akkudoktoreos.prediction.elecpriceenergycharts import (
+    ElecPriceEnergyCharts,
+    EnergyChartsBiddingZones,
+    EnergyChartsElecPrice,
+)
+from akkudoktoreos.prediction.feedintariffabc import FeedInTariffProvider
+from akkudoktoreos.utils.datetimeutil import to_datetime, to_duration
+
+
+class FeedInTariffEnergyChartsCommonSettings(SettingsBaseModel):
+    """Common settings for Energy-Charts feed-in tariff provider."""
+
+    bidding_zone: EnergyChartsBiddingZones = Field(
+        default=EnergyChartsBiddingZones.DE_LU,
+        json_schema_extra={
+            "description": (
+                "Bidding Zone: 'AT', 'BE', 'CH', 'CZ', 'DE-LU', 'DE-AT-LU', 'DK1', "
+                "'DK2', 'FR', 'HU', 'IT-NORTH', 'NL', 'NO2', 'PL', 'SE4' or 'SI'"
+            ),
+            "examples": ["DE-LU"],
+        },
+    )
+
+
+class FeedInTariffEnergyCharts(FeedInTariffProvider):
+    """Fetch Energy-Charts market prices as feed-in tariff data.
+
+    This provider stores the raw Energy-Charts day-ahead market price as
+    ``feed_in_tariff_wh``. Unlike ``ElecPriceEnergyCharts`` it intentionally
+    does not add electricity import charges or VAT.
+    """
+
+    highest_orig_datetime: Optional[datetime] = None
+
+    @classmethod
+    def provider_id(cls) -> str:
+        """Return the unique identifier for the Energy-Charts feed-in tariff provider."""
+        return "FeedInTariffEnergyCharts"
+
+    def _bidding_zone(self) -> str:
+        settings = self.config.feedintariff.provider_settings.FeedInTariffEnergyCharts
+        if settings is None:
+            return EnergyChartsBiddingZones.DE_LU.value
+        bidding_zone = settings.bidding_zone
+        if isinstance(bidding_zone, EnergyChartsBiddingZones):
+            return bidding_zone.value
+        return str(bidding_zone)
+
+    @cache_in_file(with_ttl="1 hour")
+    def _request_forecast(self, start_date: Optional[str] = None) -> EnergyChartsElecPrice:
+        """Fetch market price forecast data from Energy-Charts."""
+        source = "https://api.energy-charts.info"
+        if start_date is None:
+            start_date = to_datetime(
+                self.ems_start_datetime - to_duration("35 days"), as_string="YYYY-MM-DD"
+            )
+
+        last_date = to_datetime(self.end_datetime, as_string="YYYY-MM-DD")
+        url = f"{source}/price?bzn={self._bidding_zone()}&start={start_date}&end={last_date}"
+        response = requests.get(url, timeout=30)
+        logger.debug(f"Response from {url}: {response}")
+        response.raise_for_status()
+        energy_charts_data = ElecPriceEnergyCharts._validate_data(response.content)
+        self.update_datetime = to_datetime(in_timezone=self.config.general.timezone)
+        return energy_charts_data
+
+    def _parse_data(self, energy_charts_data: EnergyChartsElecPrice) -> pd.Series:
+        series_data = pd.Series(dtype=float)
+        for unix_sec, price_eur_per_mwh in zip(
+            energy_charts_data.unix_seconds, energy_charts_data.price, strict=False
+        ):
+            orig_datetime = to_datetime(unix_sec, in_timezone=self.config.general.timezone)
+            series_data.at[orig_datetime] = price_eur_per_mwh / 1_000_000
+        return series_data
+
+    def _predict_prices(self, history, hours: int):
+        energycharts = ElecPriceEnergyCharts()
+        amount_datasets = len(self.records)
+        if amount_datasets > 800:
+            return energycharts._predict_ets(history, seasonal_periods=168, hours=hours)
+        if amount_datasets > 168:
+            return energycharts._predict_ets(history, seasonal_periods=24, hours=hours)
+        if amount_datasets > 0:
+            return energycharts._predict_median(history, hours=hours)
+        logger.error("No feed-in tariff data available for Energy-Charts prediction")
+        raise ValueError("No data available")
+
+    def _update_data(self, force_update: Optional[bool] = False) -> None:
+        """Update feed-in tariff forecast data from Energy-Charts."""
+        now = pd.Timestamp.now(tz=self.config.general.timezone)
+        midnight = now.normalize()
+        hours_ahead = 23 if now.time() < pd.Timestamp("14:00").time() else 47
+        end = midnight + pd.Timedelta(hours=hours_ahead)
+
+        if not self.ems_start_datetime:
+            raise ValueError(f"Start DateTime not set: {self.ems_start_datetime}")
+
+        past_days = 35
+        if self.highest_orig_datetime:
+            history_series = self.key_to_series(
+                key="feed_in_tariff_wh", start_datetime=self.ems_start_datetime
+            )
+            if not history_series.empty and history_series.index.min() <= self.ems_start_datetime:
+                past_days = 0
+            needs_update = end > self.highest_orig_datetime
+        else:
+            needs_update = True
+
+        if needs_update:
+            logger.info(
+                "Update FeedInTariffEnergyCharts is needed, last in history: {}",
+                self.highest_orig_datetime,
+            )
+            start_date = to_datetime(
+                self.ems_start_datetime - to_duration(f"{past_days} days"),
+                as_string="YYYY-MM-DD",
+            )
+            energy_charts_data = self._request_forecast(
+                start_date=start_date, force_update=force_update
+            )
+            series_data = self._parse_data(energy_charts_data)
+            if series_data.empty:
+                raise ValueError("No Energy-Charts feed-in tariff data available")
+            self.highest_orig_datetime = series_data.index.max()
+            self.key_from_series("feed_in_tariff_wh", series_data)
+        else:
+            logger.info(
+                "No update FeedInTariffEnergyCharts is needed, last in history: {}",
+                self.highest_orig_datetime,
+            )
+
+        history = self.key_to_array(
+            key="feed_in_tariff_wh",
+            end_datetime=self.highest_orig_datetime,
+            fill_method="linear",
+        )
+
+        if not self.highest_orig_datetime:
+            error_msg = f"Highest original datetime not available: {self.highest_orig_datetime}"
+            logger.error(error_msg)
+            raise ValueError(error_msg)
+
+        needed_hours = int(
+            self.config.prediction.hours
+            - ((self.highest_orig_datetime - self.ems_start_datetime).total_seconds() // 3600)
+        )
+
+        if needed_hours <= 0:
+            logger.warning(
+                "No feed-in tariff prediction needed. needed_hours={}, hours={}, "
+                "highest_orig_datetime={}, start_datetime={}",
+                needed_hours,
+                self.config.prediction.hours,
+                self.highest_orig_datetime,
+                self.ems_start_datetime,
+            )
+            return
+
+        prediction = self._predict_prices(history, needed_hours)
+        prediction_series = pd.Series(
+            data=prediction,
+            index=[
+                self.highest_orig_datetime + to_duration(f"{i + 1} hours")
+                for i in range(len(prediction))
+            ],
+        )
+        self.key_from_series("feed_in_tariff_wh", prediction_series)

src/akkudoktoreos/prediction/prediction.py

@@ -36,6 +36,7 @@ from akkudoktoreos.prediction.elecpriceenergycharts import ElecPriceEnergyCharts
 from akkudoktoreos.prediction.elecpricefixed import ElecPriceFixed
 from akkudoktoreos.prediction.elecpriceimport import ElecPriceImport
 from akkudoktoreos.prediction.elecpricetibber import ElecPriceTibber
+from akkudoktoreos.prediction.feedintariffenergycharts import FeedInTariffEnergyCharts
 from akkudoktoreos.prediction.feedintarifffixed import FeedInTariffFixed
 from akkudoktoreos.prediction.feedintariffimport import FeedInTariffImport
 from akkudoktoreos.prediction.loadakkudoktor import (
@@ -81,6 +82,8 @@ elecprice_energy_charts = ElecPriceEnergyCharts()
 elecprice_tibber = ElecPriceTibber()
 elecprice_fixed = ElecPriceFixed()
 elecprice_import = ElecPriceImport()
+elecprice_tibber = ElecPriceTibber()
+feedintariff_energy_charts = FeedInTariffEnergyCharts()
 feedintariff_fixed = FeedInTariffFixed()
 feedintariff_import = FeedInTariffImport()
 loadforecast_akkudoktor = LoadAkkudoktor()
@@ -106,6 +109,8 @@ def prediction_providers() -> list[
         ElecPriceTibber,
         ElecPriceFixed,
         ElecPriceImport,
+        ElecPriceTibber,
+        FeedInTariffEnergyCharts,
         FeedInTariffFixed,
         FeedInTariffImport,
         LoadAkkudoktor,
@@ -134,6 +139,8 @@ def prediction_providers() -> list[
         elecprice_tibber, \
         elecprice_fixed, \
         elecprice_import, \
+        elecprice_tibber, \
+        feedintariff_energy_charts, \
         feedintariff_fixed, \
         feedintariff_import, \
         loadforecast_akkudoktor, \
@@ -158,6 +165,8 @@ def prediction_providers() -> list[
         elecprice_tibber,
         elecprice_fixed,
         elecprice_import,
+        elecprice_tibber,
+        feedintariff_energy_charts,
         feedintariff_fixed,
         feedintariff_import,
         loadforecast_akkudoktor,
@@ -187,6 +196,8 @@ class Prediction(PredictionContainer):
             ElecPriceTibber,
             ElecPriceFixed,
             ElecPriceImport,
+            ElecPriceTibber,
+            FeedInTariffEnergyCharts,
             FeedInTariffFixed,
             FeedInTariffImport,
             LoadAkkudoktor,

src/akkudoktoreos/utils/visualize.py

@@ -549,17 +549,29 @@ def prepare_visualize(
     )
     labels = labels[start_hour:] + labels
 
+    charge_discharge_series = [
+        results["ac_charge"][start_hour:],
+        results["dc_charge"][start_hour:],
+        results["discharge_allowed"][start_hour:],
+    ]
+    charge_discharge_labels = [
+        "AC Charging (relative)",
+        "DC Charging (relative)",
+        "Discharge Allowed",
+    ]
+    charge_discharge_colors = ["blue", "green", "red"]
+    if results.get("battery_grid_export_allowed"):
+        charge_discharge_series.append(results["battery_grid_export_allowed"][start_hour:])
+        charge_discharge_labels.append("Battery Grid Export Allowed")
+        charge_discharge_colors.append("purple")
+
     report.create_bar_chart(
         labels,
-        [
+        charge_discharge_series,
-            results["ac_charge"][start_hour:],
-            results["dc_charge"][start_hour:],
-            results["discharge_allowed"][start_hour:],
-        ],
         title="AC/DC Charging and Discharge Overview",
         ylabel="Relative Power (0-1) / Discharge (0 or 1)",
-        label_names=["AC Charging (relative)", "DC Charging (relative)", "Discharge Allowed"],
+        label_names=charge_discharge_labels,
-        colors=["blue", "green", "red"],
+        colors=charge_discharge_colors,
         bottom=3,
         xlabels=labels,
     )

tests/test_feedintariffenergycharts.py

@@ -0,0 +1,77 @@
+# ruff: noqa: S101
+
+import json
+from pathlib import Path
+from unittest.mock import Mock, patch
+
+import pytest
+
+from akkudoktoreos.core.coreabc import get_ems
+from akkudoktoreos.prediction.elecpriceenergycharts import EnergyChartsElecPrice
+from akkudoktoreos.prediction.feedintariffenergycharts import FeedInTariffEnergyCharts
+from akkudoktoreos.utils.datetimeutil import to_datetime
+
+DIR_TESTDATA = Path(__file__).absolute().parent.joinpath("testdata")
+
+FILE_TESTDATA_ELECPRICE_ENERGYCHARTS_JSON = DIR_TESTDATA.joinpath(
+    "elecpriceforecast_energycharts.json"
+)
+
+
+@pytest.fixture
+def sample_energycharts_json():
+    with FILE_TESTDATA_ELECPRICE_ENERGYCHARTS_JSON.open(
+        "r", encoding="utf-8", newline=None
+    ) as f_res:
+        return json.load(f_res)
+
+
+@pytest.fixture
+def provider(config_eos):
+    config_eos.merge_settings_from_dict(
+        {
+            "elecprice": {
+                "charges_kwh": 0.21,
+                "energycharts": {"bidding_zone": "DE-LU"},
+            },
+            "feedintariff": {
+                "provider": "FeedInTariffEnergyCharts",
+                "provider_settings": {
+                    "FeedInTariffEnergyCharts": {"bidding_zone": "AT"},
+                },
+            },
+        }
+    )
+    provider = FeedInTariffEnergyCharts()
+    provider.highest_orig_datetime = None
+    provider.records.clear()
+    assert provider.enabled()
+    return provider
+
+
+def test_provider_is_available(config_eos):
+    assert "FeedInTariffEnergyCharts" in config_eos.feedintariff.providers
+
+
+def test_parse_data_uses_raw_market_price(provider, sample_energycharts_json):
+    energy_charts_data = EnergyChartsElecPrice.model_validate(sample_energycharts_json)
+
+    series = provider._parse_data(energy_charts_data)
+
+    assert series.iloc[0] == pytest.approx(sample_energycharts_json["price"][0] / 1_000_000)
+
+
+@patch("requests.get")
+def test_request_forecast_uses_feedintariff_bidding_zone(
+    mock_get, provider, sample_energycharts_json
+):
+    mock_response = Mock()
+    mock_response.status_code = 200
+    mock_response.content = json.dumps(sample_energycharts_json)
+    mock_get.return_value = mock_response
+    get_ems().set_start_datetime(to_datetime("2024-12-11 00:00:00", in_timezone="Europe/Berlin"))
+
+    provider._request_forecast(start_date="2024-12-10", force_update=True)
+
+    actual_url = mock_get.call_args[0][0]
+    assert "bzn=AT" in actual_url

tests/test_feedintarifffixed.py

@@ -57,6 +57,16 @@ def test_invalid_provider(provider, config_eos):
         config_eos.merge_settings_from_dict(settings)
 
 
+def test_direct_marketing_switch(config_eos):
+    assert config_eos.feedintariff.direct_marketing_enabled is False
+
+    config_eos.merge_settings_from_dict(
+        {"feedintariff": {"direct_marketing_enabled": True}}
+    )
+
+    assert config_eos.feedintariff.direct_marketing_enabled is True
+
+
 # ------------------------------------------------
 # Fixed feed in tariv values
 # ------------------------------------------------

tests/test_geneticoptimize.py

@@ -37,6 +37,51 @@ def compare_dict(actual: dict[str, Any], expected: dict[str, Any]):
             assert actual[key] == pytest.approx(value)
 
 
+def test_direct_marketing_uses_market_price_as_feed_in_tariff(config_eos: ConfigEOS):
+    config_eos.merge_settings_from_dict(
+        {"feedintariff": {"direct_marketing_enabled": True}}
+    )
+    parameters = GeneticOptimizationParameters(
+        ems={
+            "pv_prognose_wh": [0.0, 0.0],
+            "strompreis_euro_pro_wh": [0.0002, -0.0001],
+            "einspeiseverguetung_euro_pro_wh": [0.00007, 0.00007],
+            "preis_euro_pro_wh_akku": 0.0,
+            "gesamtlast": [0.0, 0.0],
+        },
+        pv_akku=None,
+        inverter=None,
+        eauto=None,
+    )
+
+    adjusted = GeneticOptimization()._parameters_for_config(parameters)
+
+    assert adjusted.ems.einspeiseverguetung_euro_pro_wh == [0.0002, -0.0001]
+    assert parameters.ems.einspeiseverguetung_euro_pro_wh == [0.00007, 0.00007]
+
+
+def test_direct_marketing_keeps_variable_feed_in_tariff(config_eos: ConfigEOS):
+    config_eos.merge_settings_from_dict(
+        {"feedintariff": {"direct_marketing_enabled": True}}
+    )
+    parameters = GeneticOptimizationParameters(
+        ems={
+            "pv_prognose_wh": [0.0, 0.0],
+            "strompreis_euro_pro_wh": [0.0002, 0.0003],
+            "einspeiseverguetung_euro_pro_wh": [0.0001, -0.00005],
+            "preis_euro_pro_wh_akku": 0.0,
+            "gesamtlast": [0.0, 0.0],
+        },
+        pv_akku=None,
+        inverter=None,
+        eauto=None,
+    )
+
+    adjusted = GeneticOptimization()._parameters_for_config(parameters)
+
+    assert adjusted.ems.einspeiseverguetung_euro_pro_wh == [0.0001, -0.00005]
+
+
 @pytest.mark.parametrize(
     "fn_in, fn_out, ngen, break_even",
     [

tests/test_geneticsimulation.py

@@ -1,3 +1,5 @@
+from unittest.mock import Mock
+
 import numpy as np
 import pytest
 
@@ -249,6 +251,7 @@ def genetic_simulation(config_eos) -> GeneticSimulation:
     assert simulation.ac_charge_hours is not None
     assert simulation.dc_charge_hours is not None
     assert simulation.bat_discharge_hours is not None
+    assert simulation.bat_grid_export_hours is not None
     assert simulation.ev_charge_hours is not None
     simulation.ac_charge_hours[start_hour] = 1.0
     simulation.dc_charge_hours[start_hour] = 1.0
@@ -374,3 +377,101 @@ def test_simulation(genetic_simulation):
     ), "The sum of 'Home_appliance_wh_per_hour' should be 2000."
 
     print("All tests passed successfully.")
+
+
+def test_direct_marketing_curtails_negative_feed_in(config_eos):
+    config_eos.merge_settings_from_dict(
+        {"prediction": {"hours": 2}, "optimization": {"horizon_hours": 2}}
+    )
+
+    inverter = Inverter(InverterParameters(device_id="inverter1", max_power_wh=1000.0))
+    inverter.self_consumption_predictor.calculate_self_consumption = Mock(return_value=1.0)
+
+    simulation = GeneticSimulation()
+    simulation.prepare(
+        GeneticEnergyManagementParameters(
+            pv_prognose_wh=[500.0, 500.0],
+            strompreis_euro_pro_wh=[-0.0001, -0.0001],
+            einspeiseverguetung_euro_pro_wh=[-0.0001, -0.0001],
+            preis_euro_pro_wh_akku=0.0,
+            gesamtlast=[0.0, 0.0],
+        ),
+        optimization_hours=config_eos.optimization.horizon_hours,
+        prediction_hours=config_eos.prediction.hours,
+        inverter=inverter,
+        direct_marketing_enabled=True,
+    )
+
+    result = simulation.simulate(start_hour=0)
+
+    assert result["Netzeinspeisung_Wh_pro_Stunde"][0] == 0.0
+    assert result["Einnahmen_Euro_pro_Stunde"][0] == 0.0
+    assert result["Verluste_Pro_Stunde"][0] == pytest.approx(500.0)
+
+
+def _direct_marketing_battery_export_simulation(config_eos) -> GeneticSimulation:
+    config_eos.merge_settings_from_dict(
+        {"prediction": {"hours": 2}, "optimization": {"horizon_hours": 2}}
+    )
+
+    battery = Battery(
+        SolarPanelBatteryParameters(
+            device_id="battery1",
+            capacity_wh=1000,
+            initial_soc_percentage=100,
+            min_soc_percentage=0,
+            charging_efficiency=1.0,
+            discharging_efficiency=1.0,
+            max_charge_power_w=500,
+        ),
+        prediction_hours=config_eos.prediction.hours,
+    )
+    inverter = Inverter(
+        InverterParameters(
+            device_id="inverter1",
+            max_power_wh=500.0,
+            battery_id=battery.parameters.device_id,
+        ),
+        battery=battery,
+    )
+
+    simulation = GeneticSimulation()
+    simulation.prepare(
+        GeneticEnergyManagementParameters(
+            pv_prognose_wh=[0.0, 0.0],
+            strompreis_euro_pro_wh=[0.0, 0.0],
+            einspeiseverguetung_euro_pro_wh=[0.0002, 0.0002],
+            preis_euro_pro_wh_akku=0.0,
+            gesamtlast=[0.0, 0.0],
+        ),
+        optimization_hours=config_eos.optimization.horizon_hours,
+        prediction_hours=config_eos.prediction.hours,
+        inverter=inverter,
+        direct_marketing_enabled=True,
+    )
+    return simulation
+
+
+def test_direct_marketing_discharge_allowed_does_not_export_battery(config_eos):
+    simulation = _direct_marketing_battery_export_simulation(config_eos)
+    assert simulation.bat_discharge_hours is not None
+    simulation.bat_discharge_hours[0] = 1
+
+    result = simulation.simulate(start_hour=0)
+
+    assert result["Netzeinspeisung_Wh_pro_Stunde"][0] == 0.0
+    assert simulation.battery is not None
+    assert simulation.battery.current_soc_percentage() == 100.0
+
+
+def test_direct_marketing_battery_grid_export_uses_separate_signal(config_eos):
+    simulation = _direct_marketing_battery_export_simulation(config_eos)
+    assert simulation.bat_grid_export_hours is not None
+    simulation.bat_grid_export_hours[0] = 1
+
+    result = simulation.simulate(start_hour=0)
+
+    assert result["Netzeinspeisung_Wh_pro_Stunde"][0] == pytest.approx(500.0)
+    assert result["Einnahmen_Euro_pro_Stunde"][0] == pytest.approx(0.1)
+    assert simulation.battery is not None
+    assert simulation.battery.current_soc_percentage() == 50.0

tests/test_geneticsolution.py

@@ -0,0 +1,56 @@
+# ruff: noqa: S101
+
+import numpy as np
+
+from akkudoktoreos.devices.devicesabc import BatteryOperationMode
+from akkudoktoreos.optimization.genetic.genetic import GeneticOptimization
+from akkudoktoreos.optimization.genetic.geneticsolution import GeneticSolution
+
+
+def test_battery_discharge_allowed_remains_local_load_mode(config_eos):
+    config_eos.merge_settings_from_dict(
+        {"feedintariff": {"direct_marketing_enabled": True}}
+    )
+    solution = GeneticSolution.model_construct()
+
+    operation_mode, operation_mode_factor = solution._battery_operation_from_solution(
+        ac_charge=0.0,
+        dc_charge=0.0,
+        discharge_allowed=True,
+    )
+
+    assert operation_mode == BatteryOperationMode.PEAK_SHAVING
+    assert operation_mode_factor == 1.0
+
+
+def test_battery_grid_export_signal_maps_to_grid_support_export(config_eos):
+    config_eos.merge_settings_from_dict(
+        {"feedintariff": {"direct_marketing_enabled": True}}
+    )
+    solution = GeneticSolution.model_construct()
+
+    operation_mode, operation_mode_factor = solution._battery_operation_from_solution(
+        ac_charge=0.0,
+        dc_charge=0.0,
+        discharge_allowed=False,
+        battery_grid_export_allowed=True,
+    )
+
+    assert operation_mode == BatteryOperationMode.GRID_SUPPORT_EXPORT
+    assert operation_mode_factor == 1.0
+
+
+def test_decode_charge_discharge_has_separate_battery_grid_export_state():
+    optimization = GeneticOptimization()
+    optimization.bat_possible_charge_values = [1.0]
+    optimization.optimize_dc_charge = True
+    optimization.optimize_battery_grid_export = True
+
+    ac_charge, dc_charge, discharge, battery_grid_export = (
+        optimization.decode_charge_discharge(np.array([5]))
+    )
+
+    assert ac_charge.tolist() == [0.0]
+    assert dc_charge.tolist() == [0]
+    assert discharge.tolist() == [0]
+    assert battery_grid_export.tolist() == [1]

tests/test_inverter.py

@@ -1,4 +1,4 @@
-from unittest.mock import Mock, patch
+from unittest.mock import Mock, call, patch
 
 import pytest
 
@@ -123,6 +123,25 @@ def test_process_energy_battery_discharges(inverter, mock_battery):
     inverter.self_consumption_predictor.calculate_self_consumption.assert_not_called()
 
 
+def test_process_energy_allows_battery_grid_export(inverter, mock_battery):
+    mock_battery.max_charge_power_w = 300.0
+    mock_battery.discharge_energy.side_effect = [(100.0, 0.0), (200.0, 0.0)]
+
+    grid_export, grid_import, losses, self_consumption = inverter.process_energy(
+        generation=0.0,
+        consumption=100.0,
+        hour=12,
+        allow_battery_grid_export=True,
+    )
+
+    assert grid_export == pytest.approx(200.0, rel=1e-2)
+    assert grid_import == 0.0
+    assert losses == 0.0
+    assert self_consumption == 100.0
+    mock_battery.discharge_energy.assert_has_calls([call(100.0, 12), call(200.0, 12)])
+    inverter.self_consumption_predictor.calculate_self_consumption.assert_not_called()
+
+
 def test_process_energy_battery_empty(inverter, mock_battery):
     # Battery is empty, so no energy can be discharged
     mock_battery.discharge_energy.return_value = (0.0, 0.0)

tests/test_strompreis_endpoint.py

@@ -0,0 +1,36 @@
+import pandas as pd
+import pytest
+
+from akkudoktoreos.server import eos as eos_server
+
+
+class _FakeEms:
+    async def run(self, **kwargs):
+        return None
+
+
+class _FakePrediction:
+    def __init__(self):
+        self.key_to_series_kwargs = None
+
+    def key_to_series(self, **kwargs):
+        self.key_to_series_kwargs = kwargs
+        start = pd.Timestamp(kwargs["start_datetime"].isoformat())
+        index = pd.date_range(start=start, periods=8, freq="15min")
+        values = [1.0, 3.0, 5.0, 7.0, 10.0, 14.0, 18.0, 22.0]
+        return pd.Series(values, index=index, name=kwargs["key"])
+
+
+@pytest.mark.asyncio
+async def test_strompreis_endpoint_averages_quarter_hour_prices(monkeypatch, config_eos):
+    """Deprecated /strompreis aggregates 15-minute spot prices to hourly means."""
+    prediction = _FakePrediction()
+
+    monkeypatch.setattr(eos_server, "get_ems", lambda: _FakeEms())
+    monkeypatch.setattr(eos_server, "get_prediction", lambda: prediction)
+
+    result = await eos_server.fastapi_strompreis()
+
+    assert result[:3] == [4.0, 16.0, 16.0]
+    assert len(result) == 48
+    assert prediction.key_to_series_kwargs["key"] == "elecprice_marketprice_wh"