diff --git a/config.default.yaml b/config.default.yaml
index 9462719b..7162d449 100755
--- a/config.default.yaml
+++ b/config.default.yaml
@@ -24,8 +24,13 @@ clustering:
     to_substations: false # network is simplified to nodes with positive or negative power injection (i.e. substations or offwind connections)
   aggregation_strategies:
     generators:
-      p_nom_max: "sum" # use "min" for more conservative assumptions
-      p_nom_min: "sum"
+      p_nom_max: sum # use "min" for more conservative assumptions
+      p_nom_min: sum
+      p_min_pu: mean
+      marginal_cost: mean
+      committable: any
+      ramp_limit_up: max
+      ramp_limit_down: max
 
 snapshots:
   start: "2013-01-01"
diff --git a/config.tutorial.yaml b/config.tutorial.yaml
index 4dc7a94d..f18f23f4 100755
--- a/config.tutorial.yaml
+++ b/config.tutorial.yaml
@@ -24,8 +24,13 @@ clustering:
     to_substations: false # network is simplified to nodes with positive or negative power injection (i.e. substations or offwind connections)
   aggregation_strategies:
     generators:
-      p_nom_max: "sum" # use "min" for more conservative assumptions
-      p_nom_min: "sum"
+      p_nom_max: sum # use "min" for more conservative assumptions
+      p_nom_min: sum
+      p_min_pu: mean
+      marginal_cost: mean
+      committable: any
+      ramp_limit_up: max
+      ramp_limit_down: max
 
 snapshots:
   start: "2013-03-01"