diff --git a/Snakefile b/Snakefile
index 73f2910a..5bfd6098 100644
--- a/Snakefile
+++ b/Snakefile
@@ -40,7 +40,7 @@ localrules:
 
 wildcard_constraints:
     simpl="[a-zA-Z0-9]*",
-    clusters="[0-9]+m?|all",
+    clusters="[0-9]+(m|c)?|all",
     ll="(v|c)([0-9\.]+|opt)",
     opts="[-+a-zA-Z0-9\.]*",
     sector_opts="[-+a-zA-Z0-9\.\s]*",
diff --git a/config/config.validation.yaml b/config/config.validation.yaml
index 3d3cd4f6..052755d1 100644
--- a/config/config.validation.yaml
+++ b/config/config.validation.yaml
@@ -25,6 +25,7 @@ scenario:
   - v1.0
   clusters:  # number of nodes in Europe, any integer between 37 (1 node per country-zone) and several hundred
   - 37
+  - "37c"
   # - 128
   # - 256
   # - 512
diff --git a/rules/common.smk b/rules/common.smk
index 8f0c7cbb..d36069b2 100644
--- a/rules/common.smk
+++ b/rules/common.smk
@@ -15,7 +15,7 @@ def memory(w):
         if m is not None:
             factor *= int(m.group(1)) / 8760
             break
-    if w.clusters.endswith("m"):
+    if w.clusters.endswith("m") or w.clusters.endswith("c"):
         return int(factor * (18000 + 180 * int(w.clusters[:-1])))
     elif w.clusters == "all":
         return int(factor * (18000 + 180 * 4000))
diff --git a/scripts/cluster_network.py b/scripts/cluster_network.py
index 7572d3b3..7d3f7ffd 100644
--- a/scripts/cluster_network.py
+++ b/scripts/cluster_network.py
@@ -482,6 +482,12 @@ if __name__ == "__main__":
             snakemake.config["electricity"].get("conventional_carriers", [])
         )
         aggregate_carriers = conventional.intersection(aggregate_carriers)
+    elif snakemake.wildcards.clusters.endswith("c"):
+        n_clusters = int(snakemake.wildcards.clusters[:-1])
+        conventional = set(
+            snakemake.config["electricity"].get("conventional_carriers", [])
+        )
+        aggregate_carriers = aggregate_carriers - conventional
     elif snakemake.wildcards.clusters == "all":
         n_clusters = len(n.buses)
     else:
diff --git a/scripts/solve_network.py b/scripts/solve_network.py
index d4dd537f..466c8730 100644
--- a/scripts/solve_network.py
+++ b/scripts/solve_network.py
@@ -667,8 +667,8 @@ if __name__ == "__main__":
             "solve_network",
             # configfiles="test/config.overnight.yaml",
             simpl="",
-            opts="",
-            clusters="37",
+            opts="Co2L",
+            clusters="37c",
             ll="v1.0",
             sector_opts="",
             planning_horizons="2020",