diff --git a/packages/modules/devices/qcells/qcells/bat.py b/packages/modules/devices/qcells/qcells/bat.py
index f381a7894f..4def0b1182 100644
--- a/packages/modules/devices/qcells/qcells/bat.py
+++ b/packages/modules/devices/qcells/qcells/bat.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
-from typing import TypedDict, Any
+import logging
+from typing import TypedDict, Any, Optional
 
 from modules.common.abstract_device import AbstractBat
 from modules.common.component_state import BatState
@@ -9,6 +10,25 @@
 from modules.common.store import get_bat_value_store
 from modules.devices.qcells.qcells.config import QCellsBatSetup
 
+log = logging.getLogger(__name__)
+
+# Solax/QCells Mode 8 Remote Control Registers (Holding Registers)
+# Speichersteuerung via "Individual Setting - Duration Mode"
+# Unterstuetzte Hardware: QCells Q.VOLT HYB-G3-3P (Solax Gen4),
+# Solax Gen4/Gen5/Gen6 Hybrid und AC Wechselrichter.
+REMOTE_CONTROL_MODE_REG = 0xA0           # U16: 0=Disabled, 8=Individual Duration
+REMOTE_CONTROL_SET_TYPE_REG = 0xA1       # U16: 1=Set
+REMOTE_CONTROL_PV_LIMIT_REG = 0xA2       # U32: PV Power Limit in Watt (keine Begrenzung = 30000)
+REMOTE_CONTROL_PUSH_POWER_REG = 0xA4     # S32: Battery Push Power (+Entladung, -Ladung)
+REMOTE_CONTROL_DURATION_REG = 0xA6       # U16: Dauer in Sekunden
+REMOTE_CONTROL_TIMEOUT_REG = 0xA7        # U16: Timeout in Sekunden
+
+MODE_8_INDIVIDUAL_DURATION = 8
+SET_TYPE_SET = 1
+PV_LIMIT_NO_CURTAILMENT = 30000
+REMOTE_CONTROL_DURATION = 300
+REMOTE_CONTROL_TIMEOUT = 300
+
 
 class KwargsDict(TypedDict):
     modbus_id: int
@@ -25,6 +45,7 @@ def initialize(self) -> None:
         self.client: ModbusTcpClient_ = self.kwargs['client']
         self.store = get_bat_value_store(self.component_config.id)
         self.fault_state = FaultState(ComponentInfo.from_component_config(self.component_config))
+        self.last_mode: Optional[str] = 'Undefined'
 
     def update(self) -> None:
         power = self.client.read_input_registers(0x0016, ModbusDataType.INT_16, unit=self.__modbus_id)
@@ -42,5 +63,62 @@ def update(self) -> None:
         )
         self.store.set(bat_state)
 
+    def set_power_limit(self, power_limit: Optional[int]) -> None:
+        unit = self.__modbus_id
+        log.debug(f"QCells set_power_limit: power_limit={power_limit}, "
+                  f"last_mode={self.last_mode}")
+
+        if power_limit is None:
+            log.debug("Keine Batteriesteuerung, Selbstregelung durch Wechselrichter")
+            if self.last_mode is not None:
+                with self.client:
+                    self.client.write_register(
+                        REMOTE_CONTROL_MODE_REG, 0, data_type=ModbusDataType.UINT_16, unit=unit)
+                self.last_mode = None
+        elif power_limit == 0:
+            log.debug("Aktive Batteriesteuerung. Batterie wird gestoppt (kein Entladen)")
+            if self.last_mode != 'stop':
+                self._write_mode8(power_value=0, unit=unit)
+                self.last_mode = 'stop'
+        elif power_limit > 0:
+            power_value = int(power_limit) * -1
+            log.debug(f"Aktive Batteriesteuerung. Batterie wird mit {power_value} W geladen")
+            if self.last_mode != 'charge':
+                self.last_mode = 'charge'
+            # Solax Mode 8: negativer Push Power Wert = Ladung
+            self._write_mode8(power_value, unit=unit)
+        elif power_limit < 0:
+            power_value = int(power_limit) * -1
+            log.debug(f"Aktive Batteriesteuerung. Batterie wird mit {power_value} W entladen")
+            if self.last_mode != 'discharge':
+                self.last_mode = 'discharge'
+            # Solax Mode 8: positiver Push Power Wert = Entladung
+            self._write_mode8(power_value, unit=unit)
+
+    def _write_mode8(self, power_value: int, unit: int) -> None:
+        """Schreibt die Mode 8 Remote Control Register (0xA0-0xA7)."""
+        with self.client:
+            self.client.write_register(
+                REMOTE_CONTROL_MODE_REG, MODE_8_INDIVIDUAL_DURATION,
+                data_type=ModbusDataType.UINT_16, unit=unit)
+            self.client.write_register(
+                REMOTE_CONTROL_SET_TYPE_REG, SET_TYPE_SET,
+                data_type=ModbusDataType.UINT_16, unit=unit)
+            self.client.write_register(
+                REMOTE_CONTROL_PV_LIMIT_REG, PV_LIMIT_NO_CURTAILMENT,
+                data_type=ModbusDataType.UINT_32, unit=unit)
+            self.client.write_register(
+                REMOTE_CONTROL_PUSH_POWER_REG, power_value,
+                data_type=ModbusDataType.INT_32, unit=unit)
+            self.client.write_register(
+                REMOTE_CONTROL_DURATION_REG, REMOTE_CONTROL_DURATION,
+                data_type=ModbusDataType.UINT_16, unit=unit)
+            self.client.write_register(
+                REMOTE_CONTROL_TIMEOUT_REG, REMOTE_CONTROL_TIMEOUT,
+                data_type=ModbusDataType.UINT_16, unit=unit)
+
+    def power_limit_controllable(self) -> bool:
+        return True
+
 
 component_descriptor = ComponentDescriptor(configuration_factory=QCellsBatSetup)