diff --git a/custom_components/solaredge_modbus_multi/__init__.py b/custom_components/solaredge_modbus_multi/__init__.py
index 70ee8e0a..d2d43901 100644
--- a/custom_components/solaredge_modbus_multi/__init__.py
+++ b/custom_components/solaredge_modbus_multi/__init__.py
@@ -185,13 +185,12 @@ def __init__(
 
     async def _async_update_data(self):
         try:
-            async with async_timeout.timeout(self._hub.coordinator_timeout):
-                return await self._refresh_modbus_data_with_retry(
-                    ex_type=DataUpdateFailed,
-                    limit=RetrySettings.Limit,
-                    wait_ms=RetrySettings.Time,
-                    wait_ratio=RetrySettings.Ratio,
-                )
+            return await self._refresh_modbus_data_with_retry(
+                ex_type=DataUpdateFailed,
+                limit=RetrySettings.Limit,
+                wait_ms=RetrySettings.Time,
+                wait_ratio=RetrySettings.Ratio,
+            )
 
         except HubInitFailed as e:
             raise UpdateFailed(f"{e}")
@@ -220,7 +219,8 @@ async def _refresh_modbus_data_with_retry(
         attempt = 1
         while True:
             try:
-                return await self._hub.async_refresh_modbus_data()
+                async with async_timeout.timeout(self._hub.coordinator_timeout):
+                    return await self._hub.async_refresh_modbus_data()
             except Exception as ex:
                 if not isinstance(ex, ex_type):
                     raise ex
diff --git a/custom_components/solaredge_modbus_multi/const.py b/custom_components/solaredge_modbus_multi/const.py
index 91ad8d22..a1f62dab 100644
--- a/custom_components/solaredge_modbus_multi/const.py
+++ b/custom_components/solaredge_modbus_multi/const.py
@@ -40,11 +40,19 @@ class StrEnum(str, Enum):
 )
 
 
+class SolarEdgeTimeouts(IntEnum):
+    """Timeouts in milliseconds."""
+
+    Inverter = 8400
+    Device = 1200
+    Init = 1200
+
+
 class RetrySettings(IntEnum):
     """Retry settings when opening a connection to the inverter fails."""
 
     Time = 800  # first attempt in milliseconds
-    Ratio = 2  # time multiplier between each attempt
+    Ratio = 3  # time multiplier between each attempt
     Limit = 4  # number of attempts before failing
 
 
diff --git a/custom_components/solaredge_modbus_multi/hub.py b/custom_components/solaredge_modbus_multi/hub.py
index fd1d2ec2..c15c13fd 100644
--- a/custom_components/solaredge_modbus_multi/hub.py
+++ b/custom_components/solaredge_modbus_multi/hub.py
@@ -18,7 +18,7 @@
 except ImportError:
     raise ImportError("pymodbus is not installed, or pymodbus version is not supported")
 
-from .const import DOMAIN, SunSpecNotImpl
+from .const import DOMAIN, SolarEdgeTimeouts, SunSpecNotImpl
 from .helpers import float_to_hex, parse_modbus_string
 
 _LOGGER = logging.getLogger(__name__)
@@ -125,7 +125,6 @@ def __init__(
         self._allow_battery_energy_reset = allow_battery_energy_reset
         self._battery_rating_adjust = battery_rating_adjust
         self._battery_energy_reset_cycles = battery_energy_reset_cycles
-        self._coordinator_timeout = 30
         self._id = name.lower()
         self._lock = asyncio.Lock()
         self.inverters = []
@@ -497,10 +496,44 @@ def battery_rating_adjust(self) -> int:
     def battery_energy_reset_cycles(self) -> int:
         return self._battery_energy_reset_cycles
 
+    @property
+    def number_of_meters(self) -> int:
+        return len(self.meters)
+
+    @property
+    def number_of_batteries(self) -> int:
+        return len(self.batteries)
+
+    @property
+    def number_of_inverters(self) -> int:
+        return self._number_of_inverters
+
+    @keep_modbus_open.setter
+    def keep_modbus_open(self, value: bool) -> None:
+        if value is True:
+            self._keep_modbus_open = True
+        else:
+            self._keep_modbus_open = False
+
+        _LOGGER.debug(f"keep_modbus_open={self._keep_modbus_open}")
+
     @property
     def coordinator_timeout(self) -> int:
-        _LOGGER.debug(f"coordinator timeout is {self._coordinator_timeout}")
-        return self._coordinator_timeout
+        if not self.initalized:
+            this_timeout = SolarEdgeTimeouts.Inverter * self.number_of_inverters
+            this_timeout += SolarEdgeTimeouts.Init * self.number_of_inverters
+            this_timeout += (SolarEdgeTimeouts.Device * 2) * 3  # max 3 per inverter
+            this_timeout += (SolarEdgeTimeouts.Device * 2) * 2  # max 2 per inverter
+
+        else:
+            this_timeout = SolarEdgeTimeouts.Inverter * self.number_of_inverters
+            this_timeout += SolarEdgeTimeouts.Device * self.number_of_meters
+            this_timeout += SolarEdgeTimeouts.Device * self.number_of_batteries
+
+        this_timeout = this_timeout / 1000
+
+        _LOGGER.debug(f"coordinator timeout is {this_timeout}")
+        return this_timeout
 
     @property
     def is_connected(self) -> bool: