diff --git a/flixopt/core.py b/flixopt/core.py
index bec472aaa..ea447e652 100644
--- a/flixopt/core.py
+++ b/flixopt/core.py
@@ -255,7 +255,7 @@ def _broadcast_time_to_scenarios(
             return data.copy(deep=True)
 
         # Broadcast values
-        values = np.tile(data.values, (len(coords['scenario']), 1)).T  # Tile seems to be faster than repeat()
+        values = np.repeat(data.values[:, np.newaxis], len(coords['scenario']), axis=1)
         return xr.DataArray(values.copy(), coords=coords, dims=dims)
 
     @staticmethod
@@ -278,7 +278,7 @@ def _broadcast_scenario_to_time(
             raise ConversionError("Source scenario coordinates don't match target scenario coordinates")
 
         # Broadcast values
-        values = np.repeat(data.values[:, np.newaxis], len(coords['time']), axis=1)
+        values = np.repeat(data.values[:, np.newaxis], len(coords['time']), axis=1).T
         return xr.DataArray(values.copy(), coords=coords, dims=dims)
 
     @staticmethod
@@ -361,7 +361,7 @@ def _convert_ndarray_two_dims(data: np.ndarray, coords: Dict[str, pd.Index], dim
                 return xr.DataArray(values, coords=coords, dims=dims)
             elif data.shape[0] == scenario_length:
                 # Broadcast across time
-                values = np.tile(data, (time_length, 1))
+                values = np.repeat(data[np.newaxis, :], time_length, axis=0)
                 return xr.DataArray(values, coords=coords, dims=dims)
             else:
                 raise ConversionError(f"1D array length {data.shape[0]} doesn't match either dimension")
@@ -414,7 +414,7 @@ def _convert_series(data: pd.Series, coords: Dict[str, pd.Index], dims: Tuple[st
             # Case 1: Series is indexed by time
             if data.index.equals(coords['time']):
                 # Broadcast across scenarios
-                values = np.tile(data.values[:, np.newaxis], (1, len(coords['scenario'])))
+                values = np.repeat(data.values[:, np.newaxis], len(coords['scenario']), axis=1)
                 return xr.DataArray(values.copy(), coords=coords, dims=dims)
 
             # Case 2: Series is indexed by scenario
diff --git a/tests/test_dataconverter.py b/tests/test_dataconverter.py
index a50754301..0484d4aac 100644
--- a/tests/test_dataconverter.py
+++ b/tests/test_dataconverter.py
@@ -451,6 +451,45 @@ def test_dataarray_dimension_mismatch(self, sample_time_index, sample_scenario_i
         with pytest.raises(ConversionError):
             DataConverter.as_dataarray(wrong_length, sample_time_index, sample_scenario_index)
 
+class TestDataArrayBroadcasting:
+    """Tests for broadcasting DataArrays."""
+    def test_broadcast_1d_array_to_2d(self, sample_time_index, sample_scenario_index):
+        """Test broadcasting a 1D array to all scenarios."""
+        arr_1d = np.array([1, 2, 3, 4, 5])
+
+        xr.testing.assert_equal(
+            DataConverter.as_dataarray(arr_1d, sample_time_index, sample_scenario_index),
+            xr.DataArray(
+                np.array([arr_1d] * 3).T,
+                coords=(sample_time_index, sample_scenario_index)
+            )
+        )
+
+        arr_1d = np.array([1, 2, 3])
+        xr.testing.assert_equal(
+            DataConverter.as_dataarray(arr_1d, sample_time_index, sample_scenario_index),
+            xr.DataArray(
+                np.array([arr_1d] * 5),
+                coords=(sample_time_index, sample_scenario_index)
+            )
+        )
+
+    def test_broadcast_1d_array_to_1d(self, sample_time_index,):
+        """Test broadcasting a 1D array to all scenarios."""
+        arr_1d = np.array([1, 2, 3, 4, 5])
+
+        xr.testing.assert_equal(
+            DataConverter.as_dataarray(arr_1d, sample_time_index),
+            xr.DataArray(
+                arr_1d,
+                coords=(sample_time_index,)
+            )
+        )
+
+        arr_1d = np.array([1, 2, 3])
+        with pytest.raises(ConversionError):
+            DataConverter.as_dataarray(arr_1d, sample_time_index)
+
 
 class TestEdgeCases:
     """Tests for edge cases and special scenarios."""