diff --git a/src/CHANGES.md b/src/CHANGES.md
index f40f1991..8ab41187 100644
--- a/src/CHANGES.md
+++ b/src/CHANGES.md
@@ -1,5 +1,9 @@
 # Development Changes
 
+## 0.8.14 - 2023-12-07
+* fixed decimal points for temperature (WebUI) PR #1254
+* fixed inverter statemachine available state PR #1252
+
 ## 0.8.13 - 2023-11-28
 * merge PR #1239 symbolic layout for OLED 128x64 + motion senser functionality
 * fix MqTT IP addr for ETH connections PR #1240
diff --git a/src/defines.h b/src/defines.h
index d471a5ef..80b94687 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -13,7 +13,7 @@
 //-------------------------------------
 #define VERSION_MAJOR       0
 #define VERSION_MINOR       8
-#define VERSION_PATCH       13
+#define VERSION_PATCH       14
 
 //-------------------------------------
 typedef struct {
diff --git a/src/hm/hmInverter.h b/src/hm/hmInverter.h
index eddf0664..76f08c77 100644
--- a/src/hm/hmInverter.h
+++ b/src/hm/hmInverter.h
@@ -391,6 +391,10 @@ class Inverter {
 
         bool isAvailable() {
             bool avail = false;
+
+            if((recordMeas.ts == 0) && (recordInfo.ts == 0) && (recordConfig.ts == 0) && (recordAlarm.ts == 0))
+                return false;
+
             if((*timestamp - recordMeas.ts) < INVERTER_INACT_THRES_SEC)
                 avail = true;
             if((*timestamp - recordInfo.ts) < INVERTER_INACT_THRES_SEC)