diff --git a/CHANGELOG.md b/CHANGELOG.md
index d96d3ef44..c8496e2ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added mising fields to field validation [#1422](https://github.com/ie3-institute/PowerSystemDataModel/issues/1422)
 - Fixed the issues with rtd for Cylindrical thermal storage [#1273](https://github.com/ie3-institute/PowerSystemDataModel/issues/1273)
 - Updated Controlling_em for all the loads in readthedocs[#1447](https://github.com/ie3-institute/PowerSystemDataModel/issues/1447)
+- Correctly persist EmInput entities in CsvFileSink [#1337](https://github.com/ie3-institute/PowerSystemDataModel/issues/1337)
 
 ### Changed
 - Updated CI-Pipeline to run task `Deploy` and `Staging` only for `Main` [#1403](https://github.com/ie3-institute/PowerSystemDataModel/issues/1403)
diff --git a/src/main/java/edu/ie3/datamodel/io/sink/CsvFileSink.java b/src/main/java/edu/ie3/datamodel/io/sink/CsvFileSink.java
index 4b08d00f6..996eceab7 100644
--- a/src/main/java/edu/ie3/datamodel/io/sink/CsvFileSink.java
+++ b/src/main/java/edu/ie3/datamodel/io/sink/CsvFileSink.java
@@ -10,6 +10,7 @@
 import edu.ie3.datamodel.io.csv.BufferedCsvWriter;
 import edu.ie3.datamodel.io.csv.CsvFileDefinition;
 import edu.ie3.datamodel.io.extractor.Extractor;
+import edu.ie3.datamodel.io.extractor.HasEm;
 import edu.ie3.datamodel.io.extractor.NestedEntity;
 import edu.ie3.datamodel.io.naming.FileNamingStrategy;
 import edu.ie3.datamodel.io.processor.ProcessorProvider;
@@ -225,14 +226,29 @@ public void persistJointGrid(JointGridContainer jointGridContainer) {
             .flatMap(Optional::stream)
             .collect(Collectors.toSet());
 
+    // extract all EmInput entities
+    Set<EmInput> emInputs =
+        systemParticipants.allEntitiesAsList().stream()
+            .filter(Objects::nonNull)
+            .map(HasEm.class::cast)
+            .map(HasEm::getControllingEm)
+            .flatMap(Optional::stream)
+            .flatMap(
+                em ->
+                    Stream.iterate(
+                        em, Objects::nonNull, current -> current.getControllingEm().orElse(null)))
+            .collect(Collectors.toSet());
+
     // persist all entities
     Stream.of(
             rawGridElements.allEntitiesAsList(),
             systemParticipants.allEntitiesAsList(),
             graphicElements.allEntitiesAsList(),
             types,
-            operators)
+            operators,
+            emInputs)
         .flatMap(Collection::stream)
+        .collect(Collectors.toSet())
         .forEach(this::persistIgnoreNested);
   }
 
diff --git a/src/test/groovy/edu/ie3/datamodel/io/sink/CsvFileSinkTest.groovy b/src/test/groovy/edu/ie3/datamodel/io/sink/CsvFileSinkTest.groovy
index 08b563aa4..0ffa7698e 100644
--- a/src/test/groovy/edu/ie3/datamodel/io/sink/CsvFileSinkTest.groovy
+++ b/src/test/groovy/edu/ie3/datamodel/io/sink/CsvFileSinkTest.groovy
@@ -15,6 +15,7 @@ import edu.ie3.datamodel.io.processor.input.InputEntityProcessor
 import edu.ie3.datamodel.io.processor.result.ResultEntityProcessor
 import edu.ie3.datamodel.io.processor.timeseries.TimeSeriesProcessor
 import edu.ie3.datamodel.io.processor.timeseries.TimeSeriesProcessorKey
+import edu.ie3.datamodel.io.source.csv.CsvJointGridContainerSource
 import edu.ie3.datamodel.models.OperationTime
 import edu.ie3.datamodel.models.StandardUnits
 import edu.ie3.datamodel.models.input.EmInput
@@ -357,6 +358,7 @@ class CsvFileSinkTest extends Specification implements TimeSeriesTestData {
     testBaseFolderPath.resolve("storage_type_input.csv").toFile().exists()
     testBaseFolderPath.resolve("transformer_2_w_input.csv").toFile().exists()
     testBaseFolderPath.resolve("transformer_2_w_type_input.csv").toFile().exists()
+    testBaseFolderPath.resolve("em_input.csv").toFile().exists()
 
     cleanup:
     csvFileSink.shutdown()
diff --git a/src/test/resources/edu/ie3/datamodel/io/source/csv/_joint_grid/em_input.csv b/src/test/resources/edu/ie3/datamodel/io/source/csv/_joint_grid/em_input.csv
new file mode 100644
index 000000000..4c960d870
--- /dev/null
+++ b/src/test/resources/edu/ie3/datamodel/io/source/csv/_joint_grid/em_input.csv
@@ -0,0 +1,6 @@
+uuid,id,operator,operates_from,operates_until,controlStrategy,controllingEm
+4e2f47a6-40f4-4952-9b2f-7b7d2558a143,em_system_1,,,,"SelfConsumptionOptimized",
+a3e8e4a3-7b1b-4b1e-9e7b-8d6e3f5a2b1d,em_system_2,,,,GridSupportive,4e2f47a6-40f4-4952-9b2f-7b7d2558a143
+b8d9c5b2-6c2c-4c2d-8f8c-9e7f4a6b3c2e,em_system_3,,,,PriceReactive,4e2f47a6-40f4-4952-9b2f-7b7d2558a143
+c7f0d6c1-5d3d-4d3e-7a9d-1f8a5b7c4d3f,em__system_4,,,,StoragePriority,4e2f47a6-40f4-4952-9b2f-7b7d2558a143
+d6a1e7d0-4e4e-4e4f-6b0e-2a9b6c8d5e4a,em_system_5,,,,FeedInLimitation,4e2f47a6-40f4-4952-9b2f-7b7d2558a143
\ No newline at end of file