Update plugin_growatt.py

Author: brad5505

custom_components/solax_modbus/plugin_growatt.py

@@ -2334,6 +2334,16 @@ def value_function_inverter_module(initval: int, descr: Any, datadict: dict[str,
         scale=1,
         internal=True,
     ),
+    GrowattModbusSensorEntityDescription(
+        key="vpp_allow_ac_charging",
+        register=30410,
+        scale={
+            0: "Disabled",
+            1: "Enabled",
+        },
+        allowedtypes=GEN3 | GEN4,
+        internal=True,
+    ),
     GrowattModbusSensorEntityDescription(
         name="Battery SOH",
         key="battery_soh",