fix: state-to-watts conversion in case of non-w sensor

custom_components/easee_solar_charging/coordinator.py

@@ -75,6 +75,17 @@ class EaseeSolarCoordinator(DataUpdateCoordinator):
         )
         self._setup_state_listeners()
 
+    @staticmethod
+    def _state_to_watts(state) -> float | None:
+        """Parse a power sensor state, converting kW → W when the unit says so."""
+        try:
+            value = float(state.state)
+        except (ValueError, TypeError):
+            return None
+        if state.attributes.get("unit_of_measurement", "").upper() == "KW":
+            value *= 1000
+        return value
+
     def _setup_state_listeners(self) -> None:
         @callback
         def _on_state_change(event) -> None:
@@ -82,9 +93,8 @@ class EaseeSolarCoordinator(DataUpdateCoordinator):
             new_state = event.data.get("new_state")
             if new_state is None or new_state.state in ("unknown", "unavailable"):
                 return
-            try:
-                value = float(new_state.state)
-            except ValueError:
+            value = self._state_to_watts(new_state)
+            if value is None:
                 return
             samples = self._samples[entity_id]
             samples.append((datetime.now(timezone.utc), value))
@@ -105,10 +115,7 @@ class EaseeSolarCoordinator(DataUpdateCoordinator):
         state = self.hass.states.get(entity_id)
         if state is None or state.state in ("unknown", "unavailable"):
             return None
-        try:
-            return float(state.state)
-        except ValueError:
-            return None
+        return self._state_to_watts(state)
 
     @property
     def _stop_grace(self) -> timedelta: