diff --git a/etrago/cluster/electrical.py b/etrago/cluster/electrical.py
index 2a73ca24..b20cace6 100755
--- a/etrago/cluster/electrical.py
+++ b/etrago/cluster/electrical.py
@@ -296,6 +296,7 @@ def cluster_on_extra_high_voltage(etrago, busmap, with_time=True):
             "y": _leading(busmap, network.buses),
             "geom": lambda x: np.nan,
             "country": lambda x: "",
+            "scn_name": "first",
         },
     )
 
diff --git a/etrago/execute/market_optimization.py b/etrago/execute/market_optimization.py
index e175ed44..7db69528 100644
--- a/etrago/execute/market_optimization.py
+++ b/etrago/execute/market_optimization.py
@@ -257,7 +257,7 @@ def build_market_model(self):
     """
 
     # use existing preprocessing to get only the electricity system
-    net, weight, n_clusters, busmap_foreign = preprocessing(
+    net, _, _, busmap_foreign, _, _ = preprocessing(
         self, apply_on="market_model"
     )
 
diff --git a/etrago/tools/io.py b/etrago/tools/io.py
index 87f7537e..7f1153e5 100644
--- a/etrago/tools/io.py
+++ b/etrago/tools/io.py
@@ -831,10 +831,6 @@ def extension(self, **kwargs):
 
             self.network = scenario.build_network(self.network)
 
-            # Allow lossless links to conduct bidirectional
-            self.network.links.loc[
-                self.network.links.efficiency == 1.0, "p_min_pu"
-            ] = -1
 
 
 def decommissioning(self, **kwargs):
diff --git a/etrago/tools/utilities.py b/etrago/tools/utilities.py
index df8e6058..ccaabca1 100755
--- a/etrago/tools/utilities.py
+++ b/etrago/tools/utilities.py
@@ -623,7 +623,12 @@ def connected_transformer(network, busids):
     return network.transformers[mask]
 
 
-def load_shedding(self, temporal_disaggregation=False, **kwargs):
+def load_shedding(
+    self,
+    temporal_disaggregation=False,
+    negative_load_shedding_ev=True,
+    **kwargs,
+):
     """Implement load shedding in existing network to identify
     feasibility problems
 
@@ -682,6 +687,31 @@ def load_shedding(self, temporal_disaggregation=False, **kwargs):
             "Generator",
         )
 
+        if negative_load_shedding_ev:
+            # Add negative load shedding generators for e-Mobility buses
+            ev_buses = network.buses[network.buses.carrier == "Li_ion"].index
+            index_ev = list(
+                range(
+                    start + len(network.buses.index),
+                    start + len(network.buses.index) + len(ev_buses),
+                )
+            )
+            network.import_components_from_dataframe(
+                pd.DataFrame(
+                    dict(
+                        marginal_cost=-marginal_cost,
+                        p_nom=p_nom,
+                        p_min_pu=-1,
+                        p_max_pu=0,
+                        carrier="negative load shedding",
+                        bus=ev_buses,
+                        control="PQ",
+                    ),
+                    index=index_ev,
+                ),
+                "Generator",
+            )
+
 
 def set_control_strategies(network):
     """Sets control strategies for AC generators and storage units
@@ -3065,6 +3095,8 @@ def select_elec_network(etrago, apply_on="grid_model"):
         )
         area_network = pypsa.Network()
 
+        n_clusters = pd.NA
+
     else:
         logger.warning(
             """Parameter apply_on must be either 'grid_model' or 'market_model'