diff --git a/README.md b/README.md
index eca2fbd..880b4c0 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,7 @@ To execute the example file, first run `pip install -r requirements.txt` to inst
 | --- | --- |
 | Other temperatures | |
 | `supply_line_temperature` | Supply line temperature in Celsius |
+| `buffer_tank_temperature` | Buffer tank temperature in Celsius |
 | `desired_supply_line_temperature` | Desired supply line temperature in Celsius |
 | `return_line_temperature` | Return line temperature in Celsius |
 | `brine_out_temperature` | Brine out temperature in Celsius |
diff --git a/ThermiaOnlineAPI/const.py b/ThermiaOnlineAPI/const.py
index 21e9123..8dca45c 100644
--- a/ThermiaOnlineAPI/const.py
+++ b/ThermiaOnlineAPI/const.py
@@ -44,6 +44,7 @@
 REG_HOT_WATER_TEMPERATURE = "REG_HOT_WATER_TEMPERATURE"
 REG_BRINE_OUT = "REG_BRINE_OUT"
 REG_BRINE_IN = "REG_BRINE_IN"
+REG_OPER_DATA_BUFFER_TANK = "REG_OPER_DATA_BUFFER_TANK"
 
 ###############################################################################
 # Temperature registers ("classic" specific)
diff --git a/ThermiaOnlineAPI/model/HeatPump.py b/ThermiaOnlineAPI/model/HeatPump.py
index 8fd5faf..63a7147 100644
--- a/ThermiaOnlineAPI/model/HeatPump.py
+++ b/ThermiaOnlineAPI/model/HeatPump.py
@@ -31,6 +31,7 @@
     COMP_STATUS_ITEC,
     REG_SUPPLY_LINE,
     DATETIME_FORMAT,
+    REG_OPER_DATA_BUFFER_TANK,
 )
 
 from ..utils.utils import get_dict_value_or_none, get_dict_value_or_default
@@ -524,6 +525,13 @@ def desired_supply_line_temperature(self):
             )
         )
 
+    @property
+    def buffer_tank_temperature(self):
+        return get_dict_value_or_none(
+            self.__get_temperature_data_by_register_name(REG_OPER_DATA_BUFFER_TANK),
+            "value",
+        )
+
     @property
     def return_line_temperature(self):
         return get_dict_value_or_none(