Also throttle updates to group power sensor

custom_components/powercalc/sensors/group.py

@@ -497,11 +497,12 @@ async def async_added_to_hass(self) -> None:
                     "%s: Could not restore last state: %s", self.entity_id, err,
                 )
 
-            # throttle group energy updates to only once each 30 seconds
-            state_listener = Throttle(timedelta(seconds=30))(state_listener)
-
         self._prev_state_store = await PreviousStateStore.async_get_instance(self.hass)
 
+        # throttle group updates to only once each X seconds, to prevent overloading the state machine
+        throttle_secs = 30 if isinstance(self, GroupedEnergySensor) else 5
+        state_listener = Throttle(timedelta(seconds=throttle_secs))(state_listener)
+
         self.async_on_remove(
             async_track_state_change_event(
                 self.hass,