diff --git a/custom_components/solaredge_modbus_multi/binary_sensor.py b/custom_components/solaredge_modbus_multi/binary_sensor.py
index 89f18378..5985680a 100644
--- a/custom_components/solaredge_modbus_multi/binary_sensor.py
+++ b/custom_components/solaredge_modbus_multi/binary_sensor.py
@@ -4,7 +4,10 @@
 
 import logging
 
-from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.components.binary_sensor import (
+    BinarySensorDeviceClass,
+    BinarySensorEntity,
+)
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity import EntityCategory
@@ -30,6 +33,9 @@ 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 +98,32 @@ 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."""
+
+    device_class = BinarySensorDeviceClass.POWER
+    icon = "mdi:transmission-tower"
+
+    @property
+    def available(self) -> bool:
+        return (
+            super().available and "I_Grid_Status" 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 Status"
+
+    @property
+    def entity_registry_enabled_default(self) -> bool:
+        return "I_Grid_Status" in self._platform.decoded_model.keys()
+
+    @property
+    def is_on(self) -> bool:
+        return not self._platform.decoded_model["I_Grid_Status"]
diff --git a/custom_components/solaredge_modbus_multi/hub.py b/custom_components/solaredge_modbus_multi/hub.py
index e19f6b1c..b9038e8e 100644
--- a/custom_components/solaredge_modbus_multi/hub.py
+++ b/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_status = None
 
     async def init_device(self) -> None:
         """Set up data about the device from modbus."""
@@ -1300,6 +1301,45 @@ async def read_modbus_data(self) -> None:
                     f"No response from inverter ID {self.inverter_unit_id}"
                 )
 
+        """ Grid On/Off Status """
+        if self._grid_status is not False:
+            try:
+                inverter_data = await self.hub.modbus_read_holding_registers(
+                    unit=self.inverter_unit_id, address=40113, rcount=2
+                )
+
+                decoder = BinaryPayloadDecoder.fromRegisters(
+                    inverter_data.registers,
+                    byteorder=Endian.BIG,
+                    wordorder=Endian.LITTLE,
+                )
+
+                self.decoded_model.update(
+                    OrderedDict(
+                        [
+                            ("I_Grid_Status", decoder.decode_32bit_uint()),
+                        ]
+                    )
+                )
+                self._grid_status = True
+
+            except ModbusIllegalAddress:
+                try:
+                    del self.decoded_model["I_Grid_Status"]
+                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)
diff --git a/custom_components/solaredge_modbus_multi/manifest.json b/custom_components/solaredge_modbus_multi/manifest.json
index 80783116..2f6fbea3 100644
--- a/custom_components/solaredge_modbus_multi/manifest.json
+++ b/custom_components/solaredge_modbus_multi/manifest.json
@@ -10,5 +10,5 @@
   "issue_tracker": "https://github.com/WillCodeForCats/solaredge-modbus-multi/issues",
   "loggers": ["custom_components.solaredge_modbus_multi"],
   "requirements": ["pymodbus>=3.6.6"],
-  "version": "2.4.16"
+  "version": "2.4.18"
 }