Update plugin_growatt.py

Author: rosenrot00

custom_components/solax_modbus/plugin_growatt.py

@@ -4697,6 +4697,7 @@ def value_function_inverter_module(initval: int, descr: Any, datadict: dict[str,
         key="battery_soc",
         native_unit_of_measurement=PERCENTAGE,
         device_class=SensorDeviceClass.BATTERY,
+        state_class=SensorStateClass.MEASUREMENT,
         register=1014,
         register_type=REG_INPUT,
         allowedtypes=GEN3,
@@ -6335,6 +6336,7 @@ def value_function_inverter_module(initval: int, descr: Any, datadict: dict[str,
         key="battery_soc",
         native_unit_of_measurement=PERCENTAGE,
         device_class=SensorDeviceClass.BATTERY,
+        state_class=SensorStateClass.MEASUREMENT,
         register=3171,
         register_type=REG_INPUT,
         allowedtypes=GEN4 | HYBRID,
@@ -9144,6 +9146,7 @@ def value_function_inverter_module(initval: int, descr: Any, datadict: dict[str,
         key="battery_soc",
         native_unit_of_measurement=PERCENTAGE,
         device_class=SensorDeviceClass.BATTERY,
+        state_class=SensorStateClass.MEASUREMENT,
         register=18,
         register_type=REG_INPUT,
         allowedtypes=SPF,