diff --git a/config/config.validation.yaml b/config/config.validation.yaml
index 0dc69027..8315c690 100644
--- a/config/config.validation.yaml
+++ b/config/config.validation.yaml
@@ -33,7 +33,7 @@ electricity:
     Link: [] # H2 pipeline
 
   # use pandas query strings here, e.g. Country not in ['Germany']
-  powerplants_filter: (DateOut >= 2022 or DateOut != DateOut)
+  powerplants_filter: not (DateOut < 2019)
 
   conventional_carriers: [nuclear, oil, OCGT, CCGT, coal, lignite, geothermal, biomass]
   renewable_carriers: [solar, onwind, offwind-ac, offwind-dc, hydro]
diff --git a/scripts/plot_validation_electricity_production.py b/scripts/plot_validation_electricity_production.py
index c1fb6bba..5c5569d0 100644
--- a/scripts/plot_validation_electricity_production.py
+++ b/scripts/plot_validation_electricity_production.py
@@ -31,7 +31,7 @@ if __name__ == "__main__":
             "plot_validation_electricity_production",
             simpl="",
             opts="Ept",
-            clusters="37",
+            clusters="37c",
             ll="v1.0",
         )
     configure_logging(snakemake)
@@ -119,7 +119,7 @@ if __name__ == "__main__":
     optimized.plot.area(ax=axes[0], **kwargs, title="Optimized")
     historical.plot.area(ax=axes[1], **kwargs, title="Historic")
 
-    diff = historical - optimized
+    diff = optimized - historical
     diff.clip(lower=0).plot.area(
         ax=axes[2], **kwargs, title="$\Delta$ (Optimized - Historic)"
     )