diff --git a/custom_components/solax_modbus/plugin_solax.py b/custom_components/solax_modbus/plugin_solax.py
index 245d6b9d..270d22fe 100644
--- a/custom_components/solax_modbus/plugin_solax.py
+++ b/custom_components/solax_modbus/plugin_solax.py
@@ -5243,7 +5243,7 @@ def value_function_battery_voltage_cell_difference(initval, descr, datadict):
         name = "Remaining Battery Capacity",
         key = "remaining_battery_capacity",
         native_unit_of_measurement = UnitOfEnergy.WATT_HOUR,
-        device_class = SensorDeviceClass.ENERGY,
+        device_class = SensorDeviceClass.ENERGY_STORAGE,
         state_class = SensorStateClass.MEASUREMENT,
         entity_registry_enabled_default = False,
         register = 0x118,