diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b61133b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "freilandsolar"]
+	path = freilandsolar
+	url = gitea@git.ccc-p.org:christoph/freilandsolar.git
diff --git a/freilandsolar b/freilandsolar
new file mode 160000
index 0000000..b71ab73
--- /dev/null
+++ b/freilandsolar
@@ -0,0 +1 @@
+Subproject commit b71ab734b731ae7599f715fc498bcda17fd3b6ed