diff --git a/docs/samples/sample_modbus/bat.py b/docs/samples/sample_modbus/bat.py
index e28d497e55..97303c9940 100644
--- a/docs/samples/sample_modbus/bat.py
+++ b/docs/samples/sample_modbus/bat.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+from typing import Optional
 from dataclass_utils import dataclass_from_dict
 from modules.common.abstract_device import AbstractBat
 from modules.common.component_state import BatState
@@ -11,15 +12,16 @@
 
 
 class SampleBat(AbstractBat):
-    def __init__(self, device_id: int, component_config: SampleBatSetup) -> None:
+    def __init__(self, device_id: int, component_config: SampleBatSetup, client: ModbusTcpClient_) -> None:
         self.__device_id = device_id
         self.component_config = dataclass_from_dict(SampleBatSetup, component_config)
         self.sim_counter = SimCounter(self.__device_id, self.component_config.id, prefix="speicher")
         self.store = get_bat_value_store(self.component_config.id)
         self.fault_state = FaultState(ComponentInfo.from_component_config(self.component_config))
+        self.client = client
 
-    def update(self, client: ModbusTcpClient_) -> None:
-        power = client.read_holding_registers(reg, ModbusDataType.INT_32, unit=unit)
+    def update(self) -> None:
+        power = self.client.read_holding_registers(reg, ModbusDataType.INT_32, unit=unit)
         imported, exported = self.sim_counter.sim_count(power)
 
         bat_state = BatState(
@@ -30,5 +32,9 @@ def update(self, client: ModbusTcpClient_) -> None:
         )
         self.store.set(bat_state)
 
+    def set_power_limit(self, power_limit: Optional[int]) -> None:
+        # Methode entfernen, falls die Batterie keine Steuerung der Ladeleistung unterstützt
+        self.client.write_registers(reg, power_limit)
+
 
 component_descriptor = ComponentDescriptor(configuration_factory=SampleBatSetup)
diff --git a/docs/samples/sample_modbus/counter.py b/docs/samples/sample_modbus/counter.py
index 1b878663c6..5b9650c742 100644
--- a/docs/samples/sample_modbus/counter.py
+++ b/docs/samples/sample_modbus/counter.py
@@ -11,15 +11,16 @@
 
 
 class SampleCounter(AbstractCounter):
-    def __init__(self, device_id: int, component_config: SampleCounterSetup) -> None:
+    def __init__(self, device_id: int, component_config: SampleCounterSetup, client: ModbusTcpClient_) -> None:
         self.__device_id = device_id
         self.component_config = dataclass_from_dict(SampleCounterSetup, component_config)
         self.sim_counter = SimCounter(self.__device_id, self.component_config.id, prefix="bezug")
         self.store = get_counter_value_store(self.component_config.id)
         self.fault_state = FaultState(ComponentInfo.from_component_config(self.component_config))
+        self.client = client
 
-    def update(self, client: ModbusTcpClient_):
-        power = client.read_holding_registers(reg, ModbusDataType.INT_32, unit=unit)
+    def update(self):
+        power = self.client.read_holding_registers(reg, ModbusDataType.INT_32, unit=unit)
         imported, exported = self.sim_counter.sim_count(power)
 
         counter_state = CounterState(
diff --git a/docs/samples/sample_modbus/device.py b/docs/samples/sample_modbus/device.py
index 22b1957857..07f9a88026 100644
--- a/docs/samples/sample_modbus/device.py
+++ b/docs/samples/sample_modbus/device.py
@@ -18,19 +18,19 @@
 
 def create_device(device_config: Sample):
     def create_bat_component(component_config: SampleBatSetup):
-        return SampleBat(device_config.id, component_config, device_config.configuration.ip_address)
+        return SampleBat(device_config.id, component_config, device_config.configuration.ip_address, client)
 
     def create_counter_component(component_config: SampleCounterSetup):
-        return SampleCounter(device_config.id, component_config, device_config.configuration.ip_address)
+        return SampleCounter(device_config.id, component_config, device_config.configuration.ip_address, client)
 
     def create_inverter_component(component_config: SampleInverterSetup):
-        return SampleInverter(device_config.id, component_config, device_config.configuration.ip_address)
+        return SampleInverter(device_config.id, component_config, device_config.configuration.ip_address, client)
 
     def update_components(components: Iterable[Union[SampleBat, SampleCounter, SampleInverter]]):
-        with client as c:
+        with client:
             for component in components:
                 with SingleComponentUpdateContext(component.fault_state):
-                    component.update(c)
+                    component.update()
 
     try:
         client = ModbusTcpClient_(device_config.configuration.ip_address, device_config.configuration.port)
diff --git a/docs/samples/sample_modbus/inverter.py b/docs/samples/sample_modbus/inverter.py
index 28011f5fd4..4cf593294a 100644
--- a/docs/samples/sample_modbus/inverter.py
+++ b/docs/samples/sample_modbus/inverter.py
@@ -11,15 +11,16 @@
 
 
 class SampleInverter(AbstractInverter):
-    def __init__(self, device_id: int, component_config: SampleInverterSetup) -> None:
+    def __init__(self, device_id: int, component_config: SampleInverterSetup, client: ModbusTcpClient_) -> None:
         self.__device_id = device_id
         self.component_config = dataclass_from_dict(SampleInverterSetup, component_config)
         self.sim_counter = SimCounter(self.__device_id, self.component_config.id, prefix="pv")
         self.store = get_inverter_value_store(self.component_config.id)
         self.fault_state = FaultState(ComponentInfo.from_component_config(self.component_config))
+        self.client = client
 
-    def update(self, client: ModbusTcpClient_) -> None:
-        power = client.read_holding_registers(reg, ModbusDataType.INT_32, unit=unit)
+    def update(self) -> None:
+        power = self.client.read_holding_registers(reg, ModbusDataType.INT_32, unit=unit)
         exported = self.sim_counter.sim_count(power)[1]
 
         inverter_state = InverterState(