diff --git a/config.default.yaml b/config.default.yaml
index a791578e..61bc31f7 100644
--- a/config.default.yaml
+++ b/config.default.yaml
@@ -28,11 +28,17 @@ snapshots:
   end: "2014-01-01"
   closed: 'left' # end is not inclusive
 
-
 atlite:
   cutout_dir: '../pypsa-eur/cutouts'
   cutout_name: "europe-2013-era5"
 
+# this information is NOT used but needed as an argument for
+# pypsa-eur/scripts/add_electricity.py/load_costs in make_summary.py
+electricity:
+  max_hours:
+    battery: 6
+    H2: 168
+
 biomass:
   year: 2030
   scenario: "Med"