diff --git a/doc/release_notes.rst b/doc/release_notes.rst
index b1b56416..70927880 100644
--- a/doc/release_notes.rst
+++ b/doc/release_notes.rst
@@ -12,6 +12,8 @@ Upcoming Release
 
 * Carriers of generators can now be excluded from aggregation in clustering network and simplify network.
 
+* Fix EQ constraint for the case no hydro inflow is available
+
 * Bugfix in the reserve constraint will increase demand related reserve requirements
 
 PyPSA-Eur 0.6.1 (20th September 2022)
diff --git a/scripts/solve_network.py b/scripts/solve_network.py
index 5124852f..8a964593 100755
--- a/scripts/solve_network.py
+++ b/scripts/solve_network.py
@@ -216,18 +216,21 @@ def add_EQ_constraints(n, o, scaling=1e-1):
         .T.groupby(ggrouper, axis=1)
         .apply(join_exprs)
     )
-    lhs_spill = (
-        linexpr(
-            (
-                -n.snapshot_weightings.stores * scaling,
-                get_var(n, "StorageUnit", "spill").T,
+    if not n.storage_units_t.inflow.empty:
+        lhs_spill = (
+            linexpr(
+                (
+                    -n.snapshot_weightings.stores * scaling,
+                    get_var(n, "StorageUnit", "spill").T,
+                )
             )
+            .T.groupby(sgrouper, axis=1)
+            .apply(join_exprs)
         )
-        .T.groupby(sgrouper, axis=1)
-        .apply(join_exprs)
-    )
-    lhs_spill = lhs_spill.reindex(lhs_gen.index).fillna("")
-    lhs = lhs_gen + lhs_spill
+        lhs_spill = lhs_spill.reindex(lhs_gen.index).fillna("")
+        lhs = lhs_gen + lhs_spill
+    else:
+        lhs = lhs_gen
     define_constraints(n, lhs, ">=", rhs, "equity", "min")