diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..160585f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "source/solar"]
+    path = source/solar
+    url = https://gitea.sthome.org/ESPHome/Solar.git