diff --git a/src/libecalc/dto/components.py b/src/libecalc/dto/components.py
index 9e8bb75ec1..5fcedb7743 100644
--- a/src/libecalc/dto/components.py
+++ b/src/libecalc/dto/components.py
@@ -42,6 +42,9 @@
 )
 from libecalc.dto.variables import VariablesMap
 from libecalc.expression import Expression
+from libecalc.presentation.yaml.ltp_validation import (
+    validate_generator_set_power_from_shore,
+)
 from libecalc.presentation.yaml.yaml_keywords import EcalcYamlKeywords
 from libecalc.presentation.yaml.yaml_types.emitters.yaml_venting_emitter import (
     YamlVentingEmitter,
@@ -323,21 +326,13 @@ def check_mandatory_category_for_generator_set(cls, user_defined_category, info:
 
     @model_validator(mode="after")
     def check_power_from_shore(self):
-        if self.cable_loss is not None or self.max_usage_from_shore is not None:
-            if isinstance(self.user_defined_category, ConsumerUserDefinedCategoryType):
-                if self.user_defined_category is not ConsumerUserDefinedCategoryType.POWER_FROM_SHORE:
-                    raise ValueError(
-                        f"{self.model_fields['cable_loss'].title} and {self.model_fields['max_usage_from_shore'].title} "
-                        f"are only valid for the category {ConsumerUserDefinedCategoryType.POWER_FROM_SHORE.value}, not for "
-                        f"{self.user_defined_category}."
-                    )
-            else:
-                if ConsumerUserDefinedCategoryType.POWER_FROM_SHORE not in self.user_defined_category.values():
-                    raise ValueError(
-                        f"{self.model_fields['cable_loss'].title} and {self.model_fields['max_usage_from_shore'].title} "
-                        f"are only valid for the category {ConsumerUserDefinedCategoryType.POWER_FROM_SHORE.value}, not for "
-                        f"{self.user_defined_category[datetime(1900, 1,1)].value}."
-                    )
+        _check_power_from_shore_attributes = validate_generator_set_power_from_shore(
+            cable_loss=self.cable_loss,
+            max_usage_from_shore=self.max_usage_from_shore,
+            model_fields=self.model_fields,
+            category=self.user_defined_category,
+        )
+
         return self
 
     def get_graph(self) -> ComponentGraph:
diff --git a/src/libecalc/presentation/yaml/ltp_validation.py b/src/libecalc/presentation/yaml/ltp_validation.py
new file mode 100644
index 0000000000..7ecce2ec1f
--- /dev/null
+++ b/src/libecalc/presentation/yaml/ltp_validation.py
@@ -0,0 +1,33 @@
+from datetime import datetime
+from typing import Union
+
+from libecalc.dto.base import ConsumerUserDefinedCategoryType
+from libecalc.dto.utils.validators import ExpressionType
+
+
+def validate_generator_set_power_from_shore(
+    cable_loss: ExpressionType,
+    max_usage_from_shore: ExpressionType,
+    model_fields: dict,
+    category: Union[dict, ConsumerUserDefinedCategoryType],
+):
+    if cable_loss is not None or max_usage_from_shore is not None:
+        feedback_text = (
+            f"{model_fields['cable_loss'].title} and " f"{model_fields['max_usage_from_shore'].title} are only valid"
+        )
+        if cable_loss is None:
+            feedback_text = f"{model_fields['max_usage_from_shore'].title} is only valid"
+        if max_usage_from_shore is None:
+            feedback_text = f"{model_fields['cable_loss'].title} is only valid"
+
+        if isinstance(category, ConsumerUserDefinedCategoryType):
+            if category is not ConsumerUserDefinedCategoryType.POWER_FROM_SHORE:
+                message = f"{feedback_text} for the category {ConsumerUserDefinedCategoryType.POWER_FROM_SHORE.value}, not for {category}."
+                raise ValueError(message)
+        else:
+            if ConsumerUserDefinedCategoryType.POWER_FROM_SHORE not in category.values():
+                message = (
+                    f"{feedback_text} for the category {ConsumerUserDefinedCategoryType.POWER_FROM_SHORE.value}"
+                    f", not for {category[datetime(1900, 1, 1)].value}."
+                )
+                raise ValueError(message)
diff --git a/src/libecalc/presentation/yaml/yaml_types/components/yaml_generator_set.py b/src/libecalc/presentation/yaml/yaml_types/components/yaml_generator_set.py
index bf0aa3e65b..0d3eb03dde 100644
--- a/src/libecalc/presentation/yaml/yaml_types/components/yaml_generator_set.py
+++ b/src/libecalc/presentation/yaml/yaml_types/components/yaml_generator_set.py
@@ -7,6 +7,9 @@
 from libecalc.dto.base import ConsumerUserDefinedCategoryType
 from libecalc.dto.utils.validators import ComponentNameStr
 from libecalc.expression.expression import ExpressionType
+from libecalc.presentation.yaml.ltp_validation import (
+    validate_generator_set_power_from_shore,
+)
 from libecalc.presentation.yaml.yaml_types import YamlBase
 from libecalc.presentation.yaml.yaml_types.components.legacy.yaml_electricity_consumer import (
     YamlElectricityConsumer,
@@ -68,18 +71,10 @@ class YamlGeneratorSet(YamlBase):
 
     @model_validator(mode="after")
     def check_power_from_shore(self):
-        if self.cable_loss is not None or self.max_usage_from_shore is not None:
-            if isinstance(self.category, ConsumerUserDefinedCategoryType):
-                if self.category is not ConsumerUserDefinedCategoryType.POWER_FROM_SHORE:
-                    raise ValueError(
-                        f"{self.model_fields['cable_loss'].title} and {self.model_fields['max_usage_from_shore'].title} are only valid for the "
-                        f"category {ConsumerUserDefinedCategoryType.POWER_FROM_SHORE}, not for "
-                        f"{self.category}."
-                    )
-            else:
-                if ConsumerUserDefinedCategoryType.POWER_FROM_SHORE not in self.category.values():
-                    raise ValueError(
-                        f"{self.model_fields['cable_loss'].title} and {self.model_fields['max_usage_from_shore'].title} are only valid for the "
-                        f"category {ConsumerUserDefinedCategoryType.POWER_FROM_SHORE}."
-                    )
+        _check_power_from_shore_attributes = validate_generator_set_power_from_shore(
+            cable_loss=self.cable_loss,
+            max_usage_from_shore=self.max_usage_from_shore,
+            model_fields=self.model_fields,
+            category=self.category,
+        )
         return self
diff --git a/src/tests/libecalc/dto/test_generator_set.py b/src/tests/libecalc/dto/test_generator_set.py
index aea05578d0..3af56fbdb2 100644
--- a/src/tests/libecalc/dto/test_generator_set.py
+++ b/src/tests/libecalc/dto/test_generator_set.py
@@ -108,9 +108,7 @@ def test_power_from_shore_wrong_category(self):
                 cable_loss=0,
             )
 
-        assert (
-            "CABLE_LOSS and MAX_USAGE_FROM_SHORE are only valid for the category POWER-FROM-SHORE, not for BOILER"
-        ) in str(exc_info.value)
+        assert ("CABLE_LOSS is only valid for the category POWER-FROM-SHORE, not for BOILER") in str(exc_info.value)
 
         # Check for MAX_USAGE_FROM_SHORE
         with pytest.raises(ValueError) as exc_info:
@@ -124,6 +122,22 @@ def test_power_from_shore_wrong_category(self):
                 max_usage_from_shore=20,
             )
 
+        assert ("MAX_USAGE_FROM_SHORE is only valid for the category POWER-FROM-SHORE, not for BOILER") in str(
+            exc_info.value
+        )
+
+        with pytest.raises(ValueError) as exc_info:
+            dto.GeneratorSet(
+                name="Test",
+                user_defined_category={datetime(1900, 1, 1): ConsumerUserDefinedCategoryType.BOILER},
+                generator_set_model={},
+                regularity={datetime(1900, 1, 1): Expression.setup_from_expression(1)},
+                consumers=[],
+                fuel={},
+                max_usage_from_shore=20,
+                cable_loss=0,
+            )
+
         assert (
             "CABLE_LOSS and MAX_USAGE_FROM_SHORE are only valid for the category POWER-FROM-SHORE, not for BOILER"
         ) in str(exc_info.value)