diff --git a/lib/Hoymiles/src/Hoymiles.cpp b/lib/Hoymiles/src/Hoymiles.cpp
index 7dd3d25..1bfbad5 100644
--- a/lib/Hoymiles/src/Hoymiles.cpp
+++ b/lib/Hoymiles/src/Hoymiles.cpp
@@ -32,7 +32,7 @@ void HoymilesClass::loop()
                 iv->sendAlarmLogRequest(_radio.get());
 
                 // Fetch limit
-                if (iv->SystemConfigPara()->getLastUpdate() == 0) {
+                if ((iv->SystemConfigPara()->getLastUpdate() == 0) || (millis() - iv->SystemConfigPara()->getLastUpdate() > HOY_SYSTEM_CONFIG_PARA_POLL_INTERVAL)) {
                     Serial.println("Request SystemConfigPara");
                     iv->sendSystemConfigParaRequest(_radio.get());
                 }
diff --git a/lib/Hoymiles/src/Hoymiles.h b/lib/Hoymiles/src/Hoymiles.h
index 04d16ca..10b0c9c 100644
--- a/lib/Hoymiles/src/Hoymiles.h
+++ b/lib/Hoymiles/src/Hoymiles.h
@@ -7,6 +7,8 @@
 #include <memory>
 #include <vector>
 
+#define HOY_SYSTEM_CONFIG_PARA_POLL_INTERVAL (10 * 60 * 1000) // 10 minutes
+
 class HoymilesClass {
 public:
     void init();