diff --git a/src/VictronMppt.cpp b/src/VictronMppt.cpp
index 4e084974..a994e20d 100644
--- a/src/VictronMppt.cpp
+++ b/src/VictronMppt.cpp
@@ -87,7 +87,7 @@ bool VictronMpptClass::isDataValid() const
         if (upController->isDataValid()) { return true; }
     }
 
-    return !_controllers.empty();
+    return false;
 }
 
 bool VictronMpptClass::isDataValid(size_t idx) const