Add configurable optimizer area sensors

README.md

@@ -12,6 +12,13 @@ Pro Optimierer werden zwei Sensoren angelegt:
 - **Tagesenergie** in Wh (`total_increasing`)
 - **Aktuelle Leistung** in W (`measurement`)
 
+Zusätzlich können Optimierer zu Dachflächen zusammengefasst werden. Pro Fläche
+entstehen zwei weitere Sensoren mit der Summe aller vollständig verfügbaren
+Optimiererwerte:
+
+- **Fläche Tagesenergie** in Wh
+- **Fläche aktuelle Leistung** in W
+
 Die Seriennummer bleibt Bestandteil der stabilen Entity-ID. Optimierer-ID,
 String-ID, Wechselrichter-ID und Zeitpunkt der letzten Messung stehen als
 Attribute zur Verfügung.
@@ -31,7 +38,7 @@ HACS unterstützt keine Gitea-Repositories. Lade deshalb das Archiv der
 gewünschten Version herunter und entpacke es:
 
 ```text
-https://git.jensneuber.de/jens/ha-solaredge-optimizers/archive/v0.2.0.zip
+https://git.jensneuber.de/jens/ha-solaredge-optimizers/archive/v0.3.0.zip
 ```
 
 Kopiere anschließend den enthaltenen Ordner
@@ -57,6 +64,24 @@ Die Integration liest den Cache standardmäßig alle 600 Sekunden. Dieser Wert
 kann über **Neu konfigurieren** geändert werden. Dadurch entstehen keine
 zusätzlichen SolarEdge-Portalabrufe; diese steuert die App selbst.
 
+## Flächen konfigurieren
+
+Öffne die Integration unter **Einstellungen → Geräte & Dienste** und wähle
+**Konfigurieren**. Die Flächen-Zuordnung ist ein JSON-Objekt, dessen Schlüssel
+die Flächennamen und dessen Werte Listen von Optimizer-IDs sind:
+
+```json
+{
+  "west1": ["1.1.1", "1.1.2"],
+  "süd": ["1.1.15", "1.1.16"]
+}
+```
+
+Ein Optimierer darf nur einer Fläche zugeordnet sein. Unbekannte IDs und leere
+Flächen werden beim Speichern abgewiesen. Für Site `4886699` sind `west1`,
+`west2`, `gaube`, `süd`, `ost1` und `ost2` bereits als Startwert hinterlegt.
+Mit `{}` können alle Flächensensoren deaktiviert werden.
+
 ## Entwicklung
 
 ```shell

custom_components/solaredge_optimizers/api.py

@@ -64,6 +64,15 @@ class OptimizerSnapshot:
         """Return readings indexed by optimizer serial number."""
         return {optimizer.serial: optimizer for optimizer in self.optimizers}
 
+    @property
+    def optimizers_by_id(self) -> dict[str, OptimizerData]:
+        """Return readings indexed by logical optimizer ID."""
+        return {
+            optimizer.optimizer_id: optimizer
+            for optimizer in self.optimizers
+            if optimizer.optimizer_id is not None
+        }
+
 
 class SolarEdgeOptimizerApiClient:
     """Read the local SolarEdge Optimizer Data App API."""

custom_components/solaredge_optimizers/areas.py

@@ -0,0 +1,124 @@
+"""Optimizer area mapping helpers."""
+
+from __future__ import annotations
+
+from collections.abc import Collection, Mapping
+from typing import Any
+
+from homeassistant.util import slugify
+
+from .const import CONF_AREA_MAPPING, LOGGER
+
+type AreaMapping = dict[str, tuple[str, ...]]
+
+DEFAULT_AREA_MAPPINGS: dict[str, dict[str, list[str]]] = {
+    "4886699": {
+        "west1": [
+            "1.1.1",
+            "1.1.2",
+            "1.1.4",
+            "1.1.5",
+            "1.1.6",
+            "1.1.9",
+            "1.1.10",
+            "1.1.11",
+            "1.1.12",
+        ],
+        "west2": ["1.1.3", "1.1.13", "1.1.14"],
+        "gaube": ["1.1.7", "1.1.8"],
+        "süd": ["1.1.15", "1.1.16"],
+        "ost1": [
+            "1.2.1",
+            "1.2.2",
+            "1.2.3",
+            "1.2.4",
+            "1.2.7",
+            "1.2.8",
+            "1.2.9",
+            "1.2.10",
+            "1.2.11",
+            "1.2.12",
+            "1.2.13",
+            "1.2.14",
+            "1.2.17",
+            "1.2.18",
+        ],
+        "ost2": ["1.2.5", "1.2.6", "1.2.15", "1.2.16"],
+    }
+}
+
+
+class AreaMappingError(ValueError):
+    """An area mapping could not be validated."""
+
+    def __init__(self, translation_key: str) -> None:
+        """Initialize the mapping error."""
+        super().__init__(translation_key)
+        self.translation_key = translation_key
+
+
+def default_area_mapping(site_id: str) -> dict[str, list[str]]:
+    """Return a mutable copy of the site's default area mapping."""
+    return {
+        area: list(optimizer_ids)
+        for area, optimizer_ids in DEFAULT_AREA_MAPPINGS.get(site_id, {}).items()
+    }
+
+
+def configured_area_mapping(site_id: str, options: Mapping[str, Any]) -> AreaMapping:
+    """Return the configured mapping or the site-specific default."""
+    value = options.get(CONF_AREA_MAPPING, default_area_mapping(site_id))
+    try:
+        return parse_area_mapping(value)
+    except AreaMappingError:
+        LOGGER.exception("Stored optimizer area mapping is invalid")
+        return {}
+
+
+def parse_area_mapping(
+    value: Any,
+    available_optimizer_ids: Collection[str] | None = None,
+) -> AreaMapping:
+    """Validate and normalize an optimizer area mapping."""
+    if not isinstance(value, dict):
+        raise AreaMappingError("invalid_area_mapping")
+
+    available = (
+        set(available_optimizer_ids) if available_optimizer_ids is not None else None
+    )
+    mapping: AreaMapping = {}
+    assigned_optimizer_ids: set[str] = set()
+    area_slugs: set[str] = set()
+
+    for raw_area, raw_optimizer_ids in value.items():
+        if not isinstance(raw_area, str) or not (area := raw_area.strip()):
+            raise AreaMappingError("invalid_area_mapping")
+        area_slug = slugify(area)
+        if not area_slug or area_slug in area_slugs:
+            raise AreaMappingError("duplicate_area")
+        area_slugs.add(area_slug)
+
+        if not isinstance(raw_optimizer_ids, list) or not raw_optimizer_ids:
+            raise AreaMappingError("empty_area")
+
+        optimizer_ids: list[str] = []
+        for raw_optimizer_id in raw_optimizer_ids:
+            if not isinstance(raw_optimizer_id, str) or not (
+                optimizer_id := raw_optimizer_id.strip()
+            ):
+                raise AreaMappingError("invalid_area_mapping")
+            if available is not None and optimizer_id not in available:
+                raise AreaMappingError("unknown_optimizer")
+            if optimizer_id in assigned_optimizer_ids:
+                raise AreaMappingError("duplicate_optimizer")
+            assigned_optimizer_ids.add(optimizer_id)
+            optimizer_ids.append(optimizer_id)
+
+        mapping[area] = tuple(optimizer_ids)
+
+    return mapping
+
+
+def serialize_area_mapping(mapping: AreaMapping) -> dict[str, list[str]]:
+    """Convert the normalized mapping into config-entry-safe data."""
+    return {area: list(optimizer_ids) for area, optimizer_ids in mapping.items()}

custom_components/solaredge_optimizers/config_flow.py

@@ -5,10 +5,16 @@ from __future__ import annotations
 from typing import Any, override
 
 import voluptuous as vol
-from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
+from homeassistant.config_entries import (
+    ConfigEntry,
+    ConfigFlow,
+    ConfigFlowResult,
+    OptionsFlow,
+)
 from homeassistant.const import CONF_URL
-from homeassistant.core import HomeAssistant
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
+from homeassistant.helpers.selector import ObjectSelector
 from homeassistant.helpers.service_info.hassio import HassioServiceInfo
 
 from .api import (
@@ -18,7 +24,14 @@ from .api import (
     SolarEdgeOptimizerInvalidResponseError,
     normalize_base_url,
 )
+from .areas import (
+    AreaMappingError,
+    default_area_mapping,
+    parse_area_mapping,
+    serialize_area_mapping,
+)
 from .const import (
+    CONF_AREA_MAPPING,
     CONF_SCAN_INTERVAL,
     CONFIG_ENTRY_VERSION,
     DEFAULT_PORT,
@@ -64,6 +77,13 @@ class SolarEdgeOptimizersConfigFlow(ConfigFlow, domain=DOMAIN):
 
     VERSION = CONFIG_ENTRY_VERSION
 
+    @staticmethod
+    @callback
+    @override
+    def async_get_options_flow(config_entry: ConfigEntry) -> OptionsFlow:
+        """Return the options flow."""
+        return SolarEdgeOptimizerOptionsFlow()
+
     def __init__(self) -> None:
         """Initialize the flow."""
         self._discovered_url: str | None = None
@@ -193,3 +213,59 @@ class SolarEdgeOptimizersConfigFlow(ConfigFlow, domain=DOMAIN):
         except Exception:  # noqa: BLE001
             LOGGER.exception("Unexpected exception while validating configuration")
             return {"base": "unknown"}
+
+
+class SolarEdgeOptimizerOptionsFlow(OptionsFlow):
+    """Configure optimizer area mappings."""
+
+    @override
+    async def async_step_init(
+        self, user_input: dict[str, Any] | None = None
+    ) -> ConfigFlowResult:
+        """Manage area mapping options."""
+        coordinator = self.config_entry.runtime_data
+        available_optimizer_ids = {
+            optimizer.optimizer_id
+            for optimizer in coordinator.data.optimizers
+            if optimizer.optimizer_id is not None
+        }
+        errors: dict[str, str] = {}
+
+        if user_input is not None:
+            try:
+                mapping = parse_area_mapping(
+                    user_input.get(CONF_AREA_MAPPING, {}),
+                    available_optimizer_ids,
+                )
+            except AreaMappingError as err:
+                errors["base"] = err.translation_key
+            else:
+                return self.async_create_entry(
+                    data={
+                        **self.config_entry.options,
+                        CONF_AREA_MAPPING: serialize_area_mapping(mapping),
+                    }
+                )
+
+        site_id = coordinator.data.site_id
+        current_mapping = self.config_entry.options.get(
+            CONF_AREA_MAPPING, default_area_mapping(site_id)
+        )
+        if user_input is not None:
+            current_mapping = user_input.get(CONF_AREA_MAPPING, {})
+
+        return self.async_show_form(
+            step_id="init",
+            data_schema=vol.Schema(
+                {
+                    vol.Required(
+                        CONF_AREA_MAPPING,
+                        default=current_mapping,
+                    ): ObjectSelector()
+                }
+            ),
+            errors=errors,
+            description_placeholders={
+                "optimizer_ids": ", ".join(sorted(available_optimizer_ids))
+            },
+        )

custom_components/solaredge_optimizers/const.py

@@ -8,6 +8,7 @@ LOGGER = logging.getLogger(__package__)
 CONFIG_ENTRY_VERSION = 2
 
 CONF_SCAN_INTERVAL = "scan_interval"
+CONF_AREA_MAPPING = "area_mapping"
 DEFAULT_SCAN_INTERVAL = timedelta(minutes=10)
 MIN_SCAN_INTERVAL_SECONDS = 60
 DEFAULT_PORT = 8099

custom_components/solaredge_optimizers/diagnostics.py

@@ -19,6 +19,7 @@ async def async_get_config_entry_diagnostics(
             "title": entry.title,
             "unique_id": entry.unique_id,
             "data": dict(entry.data),
+            "options": dict(entry.options),
         },
         "coordinator": {
             "last_update_success": entry.runtime_data.last_update_success,

custom_components/solaredge_optimizers/manifest.json

@@ -8,5 +8,5 @@
   "iot_class": "local_polling",
   "issue_tracker": "https://git.jensneuber.de/jens/ha-solaredge-optimizers/issues",
   "requirements": [],
-  "version": "0.2.0"
+  "version": "0.3.0"
 }

custom_components/solaredge_optimizers/sensor.py

@@ -13,13 +13,16 @@ from homeassistant.components.sensor import (
     SensorStateClass,
 )
 from homeassistant.const import UnitOfEnergy, UnitOfPower
-from homeassistant.core import callback
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers import entity_registry as er
 from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
+from homeassistant.util import slugify
 
 from . import SolarEdgeOptimizerConfigEntry
 from .api import OptimizerData
+from .areas import configured_area_mapping
 from .const import DOMAIN
 from .coordinator import SolarEdgeOptimizerCoordinator
 
@@ -54,14 +57,44 @@ SENSOR_DESCRIPTIONS = (
     ),
 )
 
+AREA_SENSOR_DESCRIPTIONS = (
+    SolarEdgeOptimizerSensorDescription(
+        key="daily_energy",
+        translation_key="area_daily_energy",
+        device_class=SensorDeviceClass.ENERGY,
+        native_unit_of_measurement=UnitOfEnergy.WATT_HOUR,
+        state_class=SensorStateClass.TOTAL_INCREASING,
+        suggested_display_precision=1,
+        value_fn=lambda optimizer: optimizer.daily_energy_wh,
+    ),
+    SolarEdgeOptimizerSensorDescription(
+        key="current_power",
+        translation_key="area_current_power",
+        device_class=SensorDeviceClass.POWER,
+        native_unit_of_measurement=UnitOfPower.WATT,
+        state_class=SensorStateClass.MEASUREMENT,
+        suggested_display_precision=1,
+        value_fn=lambda optimizer: optimizer.current_power_w,
+    ),
+)
+
 
 async def async_setup_entry(
-    hass: Any,
+    hass: HomeAssistant,
     entry: SolarEdgeOptimizerConfigEntry,
     async_add_entities: AddConfigEntryEntitiesCallback,
 ) -> None:
     """Set up optimizer sensors from a config entry."""
     coordinator = entry.runtime_data
+    area_mapping = configured_area_mapping(coordinator.data.site_id, entry.options)
+    area_entities = [
+        SolarEdgeAreaSensor(coordinator, area, optimizer_ids, description)
+        for area, optimizer_ids in area_mapping.items()
+        for description in AREA_SENSOR_DESCRIPTIONS
+    ]
+    _remove_stale_area_entities(hass, entry, area_entities)
+    async_add_entities(area_entities)
+
     known_serials: set[str] = set()
 
     @callback
@@ -84,6 +117,34 @@ async def async_setup_entry(
     entry.async_on_unload(coordinator.async_add_listener(async_add_new_optimizers))
 
 
+def _remove_stale_area_entities(
+    hass: HomeAssistant,
+    entry: SolarEdgeOptimizerConfigEntry,
+    area_entities: list[SolarEdgeAreaSensor],
+) -> None:
+    """Remove registry entries for areas no longer configured."""
+    entity_registry = er.async_get(hass)
+    desired_unique_ids = {entity.unique_id for entity in area_entities}
+    area_prefix = f"{entry.runtime_data.data.site_id}_area_"
+    for entity in er.async_entries_for_config_entry(entity_registry, entry.entry_id):
+        if (
+            entity.unique_id.startswith(area_prefix)
+            and entity.unique_id not in desired_unique_ids
+        ):
+            entity_registry.async_remove(entity.entity_id)
+
+
+def _site_device_info(coordinator: SolarEdgeOptimizerCoordinator) -> DeviceInfo:
+    """Return the shared SolarEdge site device information."""
+    site_id = coordinator.data.site_id
+    return DeviceInfo(
+        identifiers={(DOMAIN, site_id)},
+        manufacturer="SolarEdge",
+        model="Optimizer Monitoring Site",
+        name=f"SolarEdge Site {site_id}",
+    )
+
+
 class SolarEdgeOptimizerSensor(
     CoordinatorEntity[SolarEdgeOptimizerCoordinator], SensorEntity
 ):
@@ -126,13 +187,7 @@ class SolarEdgeOptimizerSensor(
     @property
     def device_info(self) -> DeviceInfo:
         """Return the shared SolarEdge site device information."""
-        site_id = self.coordinator.data.site_id
-        return DeviceInfo(
-            identifiers={(DOMAIN, site_id)},
-            manufacturer="SolarEdge",
-            model="Optimizer Monitoring Site",
-            name=f"SolarEdge Site {site_id}",
-        )
+        return _site_device_info(self.coordinator)
 
     @property
     def extra_state_attributes(self) -> dict[str, Any]:
@@ -145,3 +200,67 @@ class SolarEdgeOptimizerSensor(
             "inverter_id": optimizer.inverter_id,
             "last_measurement": optimizer.last_measurement,
         }
+
+
+class SolarEdgeAreaSensor(
+    CoordinatorEntity[SolarEdgeOptimizerCoordinator], SensorEntity
+):
+    """Represent the sum of one optimizer area."""
+
+    _attr_has_entity_name = True
+
+    def __init__(
+        self,
+        coordinator: SolarEdgeOptimizerCoordinator,
+        area: str,
+        optimizer_ids: tuple[str, ...],
+        description: SolarEdgeOptimizerSensorDescription,
+    ) -> None:
+        """Initialize an area sum sensor."""
+        super().__init__(coordinator)
+        self.entity_description = description
+        self._area = area
+        self._optimizer_ids = optimizer_ids
+        self._attr_unique_id = (
+            f"{coordinator.data.site_id}_area_{slugify(area)}_{description.key}"
+        )
+        self._attr_translation_placeholders = {"area": area}
+
+    @property
+    def _values(self) -> tuple[OptimizerValue, ...]:
+        optimizers_by_id = self.coordinator.data.optimizers_by_id
+        return tuple(
+            self.entity_description.value_fn(optimizer)
+            if (optimizer := optimizers_by_id.get(optimizer_id)) is not None
+            else None
+            for optimizer_id in self._optimizer_ids
+        )
+
+    @property
+    def native_value(self) -> OptimizerValue:
+        """Return the sum when every configured optimizer value is available."""
+        values = self._values
+        if not values or any(value is None for value in values):
+            return None
+        return sum(value for value in values if value is not None)
+
+    @property
+    def available(self) -> bool:
+        """Return whether every optimizer in the area is available."""
+        return super().available and self.native_value is not None
+
+    @property
+    def device_info(self) -> DeviceInfo:
+        """Return the shared SolarEdge site device information."""
+        return _site_device_info(self.coordinator)
+
+    @property
+    def extra_state_attributes(self) -> dict[str, Any]:
+        """Return area membership and completeness information."""
+        values = self._values
+        return {
+            "area": self._area,
+            "optimizer_ids": list(self._optimizer_ids),
+            "optimizer_count": len(self._optimizer_ids),
+            "available_optimizer_count": sum(value is not None for value in values),
+        }

custom_components/solaredge_optimizers/strings.json

@@ -43,6 +43,27 @@
       "unknown": "Unexpected error"
     }
   },
+  "options": {
+    "step": {
+      "init": {
+        "title": "Configure optimizer areas",
+        "description": "Map area names to optimizer IDs as a JSON object. Available IDs: {optimizer_ids}",
+        "data": {
+          "area_mapping": "Area mapping"
+        },
+        "data_description": {
+          "area_mapping": "Example: assign IDs 1.1.1 and 1.1.2 to an area named west. Use an empty object to disable area sensors."
+        }
+      }
+    },
+    "error": {
+      "duplicate_area": "Area names must be unique",
+      "duplicate_optimizer": "An optimizer can only belong to one area",
+      "empty_area": "Every area must contain at least one optimizer",
+      "invalid_area_mapping": "Enter a JSON object containing area names and optimizer ID lists",
+      "unknown_optimizer": "The mapping contains an unknown optimizer ID"
+    }
+  },
   "entity": {
     "sensor": {
       "daily_energy": {
@@ -50,6 +71,12 @@
       },
       "current_power": {
         "name": "{optimizer_id} current power"
+      },
+      "area_daily_energy": {
+        "name": "{area} daily energy"
+      },
+      "area_current_power": {
+        "name": "{area} current power"
       }
     }
   }

custom_components/solaredge_optimizers/translations/de.json

@@ -43,6 +43,27 @@
       "unknown": "Unerwarteter Fehler"
     }
   },
+  "options": {
+    "step": {
+      "init": {
+        "title": "Optimizer-Flächen konfigurieren",
+        "description": "Ordne Flächennamen als JSON-Objekt den Optimizer-IDs zu. Verfügbare IDs: {optimizer_ids}",
+        "data": {
+          "area_mapping": "Flächen-Zuordnung"
+        },
+        "data_description": {
+          "area_mapping": "Beispiel: Ordne einer Fläche west die IDs 1.1.1 und 1.1.2 zu. Ein leeres Objekt deaktiviert die Flächensensoren."
+        }
+      }
+    },
+    "error": {
+      "duplicate_area": "Flächennamen müssen eindeutig sein",
+      "duplicate_optimizer": "Ein Optimierer darf nur einer Fläche zugeordnet sein",
+      "empty_area": "Jede Fläche muss mindestens einen Optimierer enthalten",
+      "invalid_area_mapping": "Gib ein JSON-Objekt mit Flächennamen und Listen von Optimizer-IDs ein",
+      "unknown_optimizer": "Die Zuordnung enthält eine unbekannte Optimizer-ID"
+    }
+  },
   "entity": {
     "sensor": {
       "daily_energy": {
@@ -50,6 +71,12 @@
       },
       "current_power": {
         "name": "{optimizer_id} aktuelle Leistung"
+      },
+      "area_daily_energy": {
+        "name": "{area} Tagesenergie"
+      },
+      "area_current_power": {
+        "name": "{area} aktuelle Leistung"
       }
     }
   }

custom_components/solaredge_optimizers/translations/en.json

@@ -43,6 +43,27 @@
       "unknown": "Unexpected error"
     }
   },
+  "options": {
+    "step": {
+      "init": {
+        "title": "Configure optimizer areas",
+        "description": "Map area names to optimizer IDs as a JSON object. Available IDs: {optimizer_ids}",
+        "data": {
+          "area_mapping": "Area mapping"
+        },
+        "data_description": {
+          "area_mapping": "Example: assign IDs 1.1.1 and 1.1.2 to an area named west. Use an empty object to disable area sensors."
+        }
+      }
+    },
+    "error": {
+      "duplicate_area": "Area names must be unique",
+      "duplicate_optimizer": "An optimizer can only belong to one area",
+      "empty_area": "Every area must contain at least one optimizer",
+      "invalid_area_mapping": "Enter a JSON object containing area names and optimizer ID lists",
+      "unknown_optimizer": "The mapping contains an unknown optimizer ID"
+    }
+  },
   "entity": {
     "sensor": {
       "daily_energy": {
@@ -50,6 +71,12 @@
       },
       "current_power": {
         "name": "{optimizer_id} current power"
+      },
+      "area_daily_energy": {
+        "name": "{area} daily energy"
+      },
+      "area_current_power": {
+        "name": "{area} current power"
       }
     }
   }

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "ha-solaredge-optimizers"
-version = "0.2.0"
+version = "0.3.0"
 description = "Home Assistant custom integration for SolarEdge optimizer data"
 readme = "README.md"
 requires-python = ">=3.14.2"

tests/test_areas.py

@@ -0,0 +1,51 @@
+"""Tests for optimizer area mappings."""
+
+from __future__ import annotations
+
+import pytest
+
+from custom_components.solaredge_optimizers.areas import (
+    AreaMappingError,
+    default_area_mapping,
+    parse_area_mapping,
+    serialize_area_mapping,
+)
+
+
+def test_site_default_mapping() -> None:
+    """Load the six known areas for site 4886699."""
+    mapping = default_area_mapping("4886699")
+
+    assert set(mapping) == {"west1", "west2", "gaube", "süd", "ost1", "ost2"}
+    assert sum(len(optimizer_ids) for optimizer_ids in mapping.values()) == 34
+
+
+def test_parse_and_serialize_mapping() -> None:
+    """Normalize and serialize a valid mapping."""
+    mapping = parse_area_mapping(
+        {"west": ["1.1.1", "1.1.2"]},
+        {"1.1.1", "1.1.2"},
+    )
+
+    assert mapping == {"west": ("1.1.1", "1.1.2")}
+    assert serialize_area_mapping(mapping) == {"west": ["1.1.1", "1.1.2"]}
+
+
+@pytest.mark.parametrize(
+    ("mapping", "error"),
+    [
+        ({"west": []}, "empty_area"),
+        ({"west": ["1.1.99"]}, "unknown_optimizer"),
+        (
+            {"west": ["1.1.1"], "roof": ["1.1.1"]},
+            "duplicate_optimizer",
+        ),
+        ({"süd": ["1.1.1"], "sud": ["1.1.2"]}, "duplicate_area"),
+    ],
+)
+def test_reject_invalid_mapping(mapping: object, error: str) -> None:
+    """Reject invalid mappings with a translated error key."""
+    with pytest.raises(AreaMappingError) as raised:
+        parse_area_mapping(mapping, {"1.1.1", "1.1.2"})
+
+    assert raised.value.translation_key == error

tests/test_config_flow.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+from types import SimpleNamespace
 from unittest.mock import AsyncMock, patch
 
 from homeassistant import config_entries
@@ -9,9 +10,11 @@ from homeassistant.const import CONF_URL
 from homeassistant.core import HomeAssistant
 from homeassistant.data_entry_flow import FlowResultType
 from homeassistant.helpers.service_info.hassio import HassioServiceInfo
+from pytest_homeassistant_custom_component.common import MockConfigEntry
 
 from custom_components.solaredge_optimizers.api import parse_snapshot
 from custom_components.solaredge_optimizers.const import (
+    CONF_AREA_MAPPING,
     CONF_SCAN_INTERVAL,
     DOMAIN,
 )
@@ -68,3 +71,55 @@ async def test_hassio_discovery_flow(hass: HomeAssistant) -> None:
 
     assert result["type"] is FlowResultType.CREATE_ENTRY
     assert result["data"][CONF_URL] == "http://abc-solaredge-optimizer-data:8099"
+
+
+async def test_options_flow_configures_areas(hass: HomeAssistant) -> None:
+    """Configure area mappings through the options flow."""
+    entry = MockConfigEntry(
+        domain=DOMAIN,
+        title="SolarEdge Site 4886699",
+        unique_id="4886699",
+        data={CONF_URL: "http://app:8099", CONF_SCAN_INTERVAL: 600},
+        version=2,
+    )
+    entry.runtime_data = SimpleNamespace(data=parse_snapshot(SAMPLE_PAYLOAD))
+    entry.add_to_hass(hass)
+
+    result = await hass.config_entries.options.async_init(entry.entry_id)
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "init"
+
+    result = await hass.config_entries.options.async_configure(
+        result["flow_id"],
+        user_input={CONF_AREA_MAPPING: {"west": ["1.1.1", "1.1.2"]}},
+    )
+
+    assert result["type"] is FlowResultType.CREATE_ENTRY
+    assert entry.options[CONF_AREA_MAPPING] == {"west": ["1.1.1", "1.1.2"]}
+
+
+async def test_options_flow_rejects_duplicate_optimizer(hass: HomeAssistant) -> None:
+    """Reject assigning one optimizer to multiple areas."""
+    entry = MockConfigEntry(
+        domain=DOMAIN,
+        title="SolarEdge Site 4886699",
+        unique_id="4886699",
+        data={CONF_URL: "http://app:8099", CONF_SCAN_INTERVAL: 600},
+        version=2,
+    )
+    entry.runtime_data = SimpleNamespace(data=parse_snapshot(SAMPLE_PAYLOAD))
+    entry.add_to_hass(hass)
+
+    result = await hass.config_entries.options.async_init(entry.entry_id)
+    result = await hass.config_entries.options.async_configure(
+        result["flow_id"],
+        user_input={
+            CONF_AREA_MAPPING: {
+                "west": ["1.1.1"],
+                "roof": ["1.1.1"],
+            }
+        },
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["errors"] == {"base": "duplicate_optimizer"}

tests/test_sensor.py

@@ -2,16 +2,21 @@
 
 from __future__ import annotations
 
+from copy import deepcopy
 from unittest.mock import AsyncMock, patch
 
-from homeassistant.const import CONF_URL
+from homeassistant.const import CONF_URL, STATE_UNAVAILABLE
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import device_registry as dr
 from homeassistant.helpers import entity_registry as er
 from pytest_homeassistant_custom_component.common import MockConfigEntry
 
 from custom_components.solaredge_optimizers.api import parse_snapshot
-from custom_components.solaredge_optimizers.const import CONF_SCAN_INTERVAL, DOMAIN
+from custom_components.solaredge_optimizers.const import (
+    CONF_AREA_MAPPING,
+    CONF_SCAN_INTERVAL,
+    DOMAIN,
+)
 
 from .sample_data import SAMPLE_PAYLOAD
 
@@ -23,9 +28,18 @@ async def test_optimizer_sensors(hass: HomeAssistant) -> None:
         title="SolarEdge Site 4886699",
         unique_id="4886699",
         data={CONF_URL: "http://app:8099", CONF_SCAN_INTERVAL: 600},
+        options={CONF_AREA_MAPPING: {"west": ["1.1.1", "1.1.2"]}},
     )
     entry.add_to_hass(hass)
     device_registry = dr.async_get(hass)
+    entity_registry = er.async_get(hass)
+    stale_area_entity = entity_registry.async_get_or_create(
+        "sensor",
+        DOMAIN,
+        "4886699_area_old_daily_energy",
+        config_entry=entry,
+        original_name="Old area energy",
+    )
     device_registry.async_get_or_create(
         config_entry_id=entry.entry_id,
         identifiers={(DOMAIN, "4886699_14F28854-E2")},
@@ -43,15 +57,19 @@ async def test_optimizer_sensors(hass: HomeAssistant) -> None:
         assert await hass.config_entries.async_setup(entry.entry_id)
         await hass.async_block_till_done()
 
-    entity_registry = er.async_get(hass)
     entities = er.async_entries_for_config_entry(entity_registry, entry.entry_id)
-    assert len(entities) == 4
+    assert len(entities) == 6
+    assert entity_registry.async_get(stale_area_entity.entity_id) is None
 
     energy_entity = next(
-        entity for entity in entities if entity.unique_id.endswith("_daily_energy")
+        entity
+        for entity in entities
+        if entity.unique_id == "4886699_14F28854-E2_daily_energy"
     )
     power_entity = next(
-        entity for entity in entities if entity.unique_id.endswith("_current_power")
+        entity
+        for entity in entities
+        if entity.unique_id == "4886699_14F28854-E2_current_power"
     )
     energy_state = hass.states.get(energy_entity.entity_id)
     power_state = hass.states.get(power_entity.entity_id)
@@ -60,9 +78,71 @@ async def test_optimizer_sensors(hass: HomeAssistant) -> None:
     assert "1.1.1" in energy_state.name
     assert "1.1.1" in power_state.name
 
+    area_energy_entity = next(
+        entity
+        for entity in entities
+        if entity.unique_id == "4886699_area_west_daily_energy"
+    )
+    area_power_entity = next(
+        entity
+        for entity in entities
+        if entity.unique_id == "4886699_area_west_current_power"
+    )
+    area_energy_state = hass.states.get(area_energy_entity.entity_id)
+    area_power_state = hass.states.get(area_power_entity.entity_id)
+    assert area_energy_state.state == "2468.5"
+    assert area_power_state.state == "321.4"
+    assert area_energy_state.attributes["optimizer_count"] == 2
+    assert area_energy_state.attributes["optimizer_ids"] == ["1.1.1", "1.1.2"]
+
     devices = dr.async_entries_for_config_entry(device_registry, entry.entry_id)
     assert len(devices) == 1
     assert devices[0].identifiers == {(DOMAIN, "4886699")}
     assert devices[0].name == "SolarEdge Site 4886699"
     assert all(entity.device_id == devices[0].id for entity in entities)
     assert entry.version == 2
+
+
+async def test_area_energy_unavailable_when_one_optimizer_failed(
+    hass: HomeAssistant,
+) -> None:
+    """Do not publish a misleading partial area sum."""
+    payload = deepcopy(SAMPLE_PAYLOAD)
+    payload["optimizers"][1]["dailyEnergyWh"] = None
+    payload["optimizers"][1]["error"] = "Request failed"
+    payload["successfulOptimizerCount"] = 1
+    payload["failedOptimizerCount"] = 1
+
+    entry = MockConfigEntry(
+        domain=DOMAIN,
+        title="SolarEdge Site 4886699",
+        unique_id="4886699",
+        data={CONF_URL: "http://app:8099", CONF_SCAN_INTERVAL: 600},
+        options={CONF_AREA_MAPPING: {"west": ["1.1.1", "1.1.2"]}},
+        version=2,
+    )
+    entry.add_to_hass(hass)
+
+    with patch(
+        "custom_components.solaredge_optimizers.api."
+        "SolarEdgeOptimizerApiClient.async_get_optimizers",
+        AsyncMock(return_value=parse_snapshot(payload)),
+    ):
+        assert await hass.config_entries.async_setup(entry.entry_id)
+        await hass.async_block_till_done()
+
+    entity_registry = er.async_get(hass)
+    entities = er.async_entries_for_config_entry(entity_registry, entry.entry_id)
+    area_energy_entity = next(
+        entity
+        for entity in entities
+        if entity.unique_id == "4886699_area_west_daily_energy"
+    )
+    area_power_entity = next(
+        entity
+        for entity in entities
+        if entity.unique_id == "4886699_area_west_current_power"
+    )
+
+    assert hass.states.get(area_energy_entity.entity_id).state == STATE_UNAVAILABLE
+    assert hass.states.get(area_power_entity.entity_id).state == "321.4"

uv.lock

@@ -943,7 +943,7 @@ wheels = [
 
 [[package]]
 name = "ha-solaredge-optimizers"
-version = "0.2.0"
+version = "0.3.0"
 source = { virtual = "." }
 
 [package.dev-dependencies]