Update custom_components/solax_modbus/plugin_sofar.py

Co-authored-by: Tom Carpenter <T.Carpenter@leeds.ac.uk>

Author: vinceg0267

custom_components/solax_modbus/plugin_sofar.py

@@ -789,7 +789,7 @@ def value_function_sync_rtc_ymd_sofar(initval: Any, descr: Any, datadict: dict[s
     ),
     SofarModbusSelectEntityDescription(
         name="Energy Storage Mode",
-        key="charger_use_mode_x1",  # <--- Chiave univoca per X1
+        key="charger_use_mode",
         register=0x1110,
         option_dict={
             0: "Self Use",