diff --git a/VectoCore/VectoCore/Resources/XSD/VectoOutputCustomer.0.9.xsd b/VectoCore/VectoCore/Resources/XSD/VectoOutputCustomer.0.9.xsd
index 96a56d93d0fc6c7c7529f858ef724466311baf79..84887ba63f4d9c3e481397720598351ed455aa0b 100644
--- a/VectoCore/VectoCore/Resources/XSD/VectoOutputCustomer.0.9.xsd
+++ b/VectoCore/VectoCore/Resources/XSD/VectoOutputCustomer.0.9.xsd
@@ -346,7 +346,11 @@
 			<xs:element name="OffVehicleChargingCapability" type="xs:boolean"/>
 			<xs:element name="OffVehicleChargingMaxPower" minOccurs="0">
 				<xs:complexType>
-					<xs:attribute name="unit" type="out:PowerUnitType" use="required"/>
+					<xs:simpleContent>
+						<xs:extension base="xs:int">
+							<xs:attribute name="unit" type="out:PowerUnitType" use="required"/>
+						</xs:extension>
+					</xs:simpleContent>
 				</xs:complexType>
 			</xs:element>
 		</xs:sequence>