diff --git a/app/build.gradle b/app/build.gradle
index 34eec08..32b882c 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -8,8 +8,8 @@ android {
         applicationId "org.woheller69.solxpect"
         minSdkVersion 26
         targetSdk 34
-        versionCode 23
-        versionName "2.3"
+        versionCode 24
+        versionName "2.4"
 
         buildConfigField "String", "BASE_URL", "\"https://api.open-meteo.com/v1/\""
         buildConfigField "String", "TILES_URL","\"https://tile.openstreetmap.org/\""
diff --git a/app/src/main/java/org/woheller69/weather/ui/RecycleList/CityWeatherAdapter.java b/app/src/main/java/org/woheller69/weather/ui/RecycleList/CityWeatherAdapter.java
index e6f36dd..ab01a9c 100644
--- a/app/src/main/java/org/woheller69/weather/ui/RecycleList/CityWeatherAdapter.java
+++ b/app/src/main/java/org/woheller69/weather/ui/RecycleList/CityWeatherAdapter.java
@@ -100,18 +100,26 @@ public void updateForecastData(List<HourlyForecast> hourlyForecasts) {
         courseDayList = new ArrayList<>();
 
         float energyCumulated=0;
-            for (HourlyForecast f : hourlyForecasts) {
-                energyCumulated+=f.getPower();
-                f.setEnergyCum(energyCumulated);
-                if (sp.getBoolean("pref_debug",false)) {
-                    courseDayList.add(f);
-                } else {
-                    if (f.getForecastTime() >= System.currentTimeMillis()) {
-                        courseDayList.add(f);
-                    }
-                }
+        boolean isDebugMode = sp.getBoolean("pref_debug", false);
+        int stepCounter = 0; // Counter to track the number of steps taken in the loop
+
+        for (HourlyForecast f : hourlyForecasts) {
+            float power = f.getPower();
+            if (stepCounter > 0) energyCumulated += power;  //Ignore first value because power values are for preceding hour
+            f.setEnergyCum(energyCumulated);
+
+            // In debug mode show all values, otherwise only future values
+            if (isDebugMode || f.getForecastTime() >= System.currentTimeMillis()) {
+                courseDayList.add(f);
             }
-            notifyDataSetChanged();
+
+            stepCounter++;
+            //   if not in debug mode: Reset energyCumulated after every 24 hours if next step is 01:00 am because values are for previous hour
+            if (!isDebugMode && stepCounter % 24 == 1) {
+                energyCumulated = 0;
+            }
+        }
+        notifyDataSetChanged();
     }
 
     // function for week forecast list
diff --git a/app/src/main/java/org/woheller69/weather/weather_api/open_meteo/ProcessOMweatherAPIRequest.java b/app/src/main/java/org/woheller69/weather/weather_api/open_meteo/ProcessOMweatherAPIRequest.java
index 85207d2..a433b74 100644
--- a/app/src/main/java/org/woheller69/weather/weather_api/open_meteo/ProcessOMweatherAPIRequest.java
+++ b/app/src/main/java/org/woheller69/weather/weather_api/open_meteo/ProcessOMweatherAPIRequest.java
@@ -198,7 +198,7 @@ private List<WeekForecast> reanalyzeWeekIDs(List<WeekForecast> weekforecasts, Li
             float totalEnergy = 0;
             Long timeNoon = weekForecast.getForecastTime();
             for (HourlyForecast hourlyForecast: hourlyforecasts){
-                if ((hourlyForecast.getForecastTime()>=timeNoon-12*3600*1000L) && (hourlyForecast.getForecastTime()< timeNoon + 12*3600*1000L)){
+                if ((hourlyForecast.getForecastTime()>=timeNoon-11*3600*1000L) && (hourlyForecast.getForecastTime()< timeNoon + 13*3600*1000L)){ //values are for preceding hour!
                    totalEnergy+=hourlyForecast.getPower();
                 }
             }
diff --git a/fastlane/metadata/android/en-US/changelogs/24.txt b/fastlane/metadata/android/en-US/changelogs/24.txt
new file mode 100644
index 0000000..4471a88
--- /dev/null
+++ b/fastlane/metadata/android/en-US/changelogs/24.txt
@@ -0,0 +1,2 @@
+Reset cumulated values every 24h
+Bugfix
\ No newline at end of file