Grid Status On Off binary sensor

custom_components/solaredge_modbus_multi/binary_sensor.py

@@ -30,6 +30,9 @@ async def async_setup_entry(
         if hub.option_detect_extras and inverter.advanced_power_control:
             entities.append(AdvPowerControlEnabled(inverter, config_entry, coordinator))
 
+        if hub.option_detect_extras:
+            entities.append(GridStatusOnOff(inverter, config_entry, coordinator))
+
     if entities:
         async_add_entities(entities)
 
@@ -92,3 +95,31 @@ def name(self) -> str:
     @property
     def is_on(self) -> bool:
         return self._platform.decoded_model["AdvPwrCtrlEn"] == 0x1
+
+
+class GridStatusOnOff(SolarEdgeBinarySensorBase):
+    """Grid Status On Off. This is undocumented from discussions."""
+
+    icon = "mdi:transmission-tower"
+
+    @property
+    def available(self) -> bool:
+        return (
+            super().available and "grid_on_off" in self._platform.decoded_model.keys()
+        )
+
+    @property
+    def unique_id(self) -> str:
+        return f"{self._platform.uid_base}_grid_status_on_off"
+
+    @property
+    def name(self) -> str:
+        return "Grid Power Available"
+
+    @property
+    def entity_registry_enabled_default(self) -> bool:
+        return "grid_on_off" in self._platform.decoded_model.keys()
+
+    @property
+    def is_on(self) -> bool:
+        return self._platform.decoded_model["grid_on_off"]

custom_components/solaredge_modbus_multi/hub.py

@@ -753,6 +753,7 @@ def __init__(self, device_id: int, hub: SolarEdgeModbusMultiHub) -> None:
         self.global_power_control = None
         self.advanced_power_control = None
         self.site_limit_control = None
+        self._grid_on_off = None
 
     async def init_device(self) -> None:
         """Set up data about the device from modbus."""
@@ -1300,6 +1301,46 @@ async def read_modbus_data(self) -> None:
                     f"No response from inverter ID {self.inverter_unit_id}"
                 )
 
+        """ Grid On/Off Status """
+        if self.hub.option_detect_extras is True and self._grid_on_off is not False:
+            # 42162 as a Uint32 is the correct register to indicate ON/OFF grid.
+            try:
+                inverter_data = await self.hub.modbus_read_holding_registers(
+                    unit=self.inverter_unit_id, address=42162, rcount=2
+                )
+
+                decoder = BinaryPayloadDecoder.fromRegisters(
+                    inverter_data.registers,
+                    byteorder=Endian.BIG,
+                    wordorder=Endian.LITTLE,
+                )
+
+                self.decoded_model.update(
+                    OrderedDict(
+                        [
+                            ("grid_on_off", decoder.decode_32bit_uint()),
+                        ]
+                    )
+                )
+                self._grid_status = True
+
+            except ModbusIllegalAddress:
+                try:
+                    del self.decoded_model["grid_on_off"]
+                except KeyError:
+                    pass
+
+                self._grid_status = False
+
+                _LOGGER.debug(
+                    (f"I{self.inverter_unit_id}: " "Grid On/Off NOT available")
+                )
+
+            except ModbusIOError:
+                raise ModbusReadError(
+                    f"No response from inverter ID {self.inverter_unit_id}"
+                )
+
         for name, value in iter(self.decoded_model.items()):
             if isinstance(value, float):
                 display_value = float_to_hex(value)