diff --git a/solax/inverters/x1_hybrid_gen4.py b/solax/inverters/x1_hybrid_gen4.py
index ed74a9a..c020d0f 100644
--- a/solax/inverters/x1_hybrid_gen4.py
+++ b/solax/inverters/x1_hybrid_gen4.py
@@ -19,7 +19,7 @@ class X1HybridGen4(Inverter):
             vol.Required("data"): vol.Schema(
                 vol.All(
                     [vol.Coerce(float)],
-                    vol.Length(min=200, max=200),
+                    vol.Length(min=200, max=300),
                 )
             ),
             vol.Required("information"): vol.Schema(vol.All(vol.Length(min=9, max=10))),