diff --git a/edisgo/io/generators_import.py b/edisgo/io/generators_import.py
index d4c930e06..278335afd 100644
--- a/edisgo/io/generators_import.py
+++ b/edisgo/io/generators_import.py
@@ -62,20 +62,20 @@ def _import_conv_generators(session):
                 orm_conv_generators.columns.id,
                 orm_conv_generators.columns.subst_id,
                 orm_conv_generators.columns.la_id,
-                orm_conv_generators.columns.capacity,
+                (orm_conv_generators.columns.capacity).label("electrical_capacity"),
                 orm_conv_generators.columns.type,
                 orm_conv_generators.columns.voltage_level,
-                orm_conv_generators.columns.fuel,
+                (orm_conv_generators.columns.fuel).label("generation_type"),
                 func.ST_AsText(
                     func.ST_Transform(orm_conv_generators.columns.geom, srid)
-                ),
+                ).label("geom"),
             )
                 .filter(
                 orm_conv_generators.columns.subst_id
                 == edisgo_object.topology.mv_grid.id
             )
                 .filter(
-                orm_conv_generators.columns.voltage_level.in_([4, 5, 6, 7])
+                orm_conv_generators.columns.voltage_level.in_([4, 5])
             )
                 .filter(orm_conv_generators_version)
         )
@@ -107,11 +107,6 @@ def _import_res_generators(session):
 
         """
 
-        # Create filter for generation technologies
-        # ToDo: This needs to be removed when all generators can be imported
-        types_filter = orm_re_generators.columns.generation_type.in_(
-            ["solar", "wind"]
-        )
 
         # build basic query
         generators_sqla = (
@@ -139,7 +134,6 @@ def _import_res_generators(session):
                 == edisgo_object.topology.mv_grid.id
             )
                 .filter(orm_re_generators_version)
-                .filter(types_filter)
         )
 
         # extend basic query for MV generators and read data from db
@@ -180,11 +174,6 @@ def _import_res_generators(session):
 
         return generators_mv, generators_lv
 
-    logging.warning(
-        "Right now only solar and wind generators can be "
-        "imported from the oedb."
-    )
-
     def _validate_generation():
         """
         Validate generation capacity in updated grids.
@@ -200,8 +189,7 @@ def _validate_generation():
         capacity_imported = (
                 generators_res_mv["electrical_capacity"].sum()
                 + generators_res_lv["electrical_capacity"].sum()
-        )  # + \
-        # generators_conv_mv['capacity'].sum()
+        )  + generators_conv_mv['electrical_capacity'].sum()
 
         capacity_grid = edisgo_object.topology.generators_df.p_nom.sum()
 
@@ -321,10 +309,10 @@ def _validate_sample_geno_location():
 
     # get conventional and renewable generators
     with session_scope() as session:
-        # generators_conv_mv = _import_conv_generators(session)
+        generators_conv_mv = _import_conv_generators(session)
         generators_res_mv, generators_res_lv = _import_res_generators(session)
 
-    # generators_mv = generators_conv_mv.append(generators_res_mv)
+    generators_mv = generators_conv_mv.append(generators_res_mv)
 
     # validate that imported generators are located inside the grid district
     _validate_sample_geno_location()
@@ -332,7 +320,7 @@ def _validate_sample_geno_location():
     update_grids(
         edisgo_object=edisgo_object,
         # generators_mv=generators_mv,
-        imported_generators_mv=generators_res_mv,
+        imported_generators_mv=generators_mv,
         imported_generators_lv=generators_res_lv,
     )