diff --git a/fhem/CHANGED b/fhem/CHANGED
index 8335af826..41ac93b09 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -1,5 +1,6 @@
 # Add changes at the top of the list. Keep it in ASCII, and 80-char wide.
 # Do not insert empty lines here, update check depends on it
+ - bugfix:  76_SolarForecast: Illegal division by zero
  - bufgix:  32_withings: improved token refresh timing
  - change:  38_netatmo: improved disconnect handling on auth failure
  - change:  76_SolarForecast: set inverterStrings to attr setupInverterStrings
diff --git a/fhem/FHEM/76_SolarForecast.pm b/fhem/FHEM/76_SolarForecast.pm
index 21ff63298..21b554907 100644
--- a/fhem/FHEM/76_SolarForecast.pm
+++ b/fhem/FHEM/76_SolarForecast.pm
@@ -157,6 +157,7 @@ BEGIN {
 
 # Versions History intern
 my %vNotesIntern = (
+  "1.25.1" => "08.06.2024  Illegal division by zero Forum:https://forum.fhem.de/index.php?msg=1314730 ",  
   "1.25.0" => "05.06.2024  transformed setter inverterStrings to attr setupInverterStrings, calcTodayPVdeviation: fix continuously calc again ",
   "1.24.0" => "03.06.2024  transformed setter currentInverterDev to attr setupInverterDev, calcTodayPVdeviation: fix continuously calc ",
   "1.23.0" => "02.06.2024  transformed setter currentBatteryDev to attr setupBatteryDev, _transferInverterValues: change output for DEBUG ".
@@ -10624,6 +10625,8 @@ sub calcTodayPVdeviation {
   }
   else {                                                     
       my $pvfcd = ReadingsNum ($name, 'RestOfDayPVforecast', 0) - $pvfc;      # PV Prognose bis jetzt
+      return if(!$pvfcd);                                                     # Illegal division by zero verhindern
+      
       $dp       = sprintf "%.2f", (100 - (100 * $pvre / abs $pvfcd));         # V 1.25.0
   }
 
diff --git a/fhem/contrib/DS_Starter/76_SolarForecast.pm b/fhem/contrib/DS_Starter/76_SolarForecast.pm
index 21ff63298..21b554907 100644
--- a/fhem/contrib/DS_Starter/76_SolarForecast.pm
+++ b/fhem/contrib/DS_Starter/76_SolarForecast.pm
@@ -157,6 +157,7 @@ BEGIN {
 
 # Versions History intern
 my %vNotesIntern = (
+  "1.25.1" => "08.06.2024  Illegal division by zero Forum:https://forum.fhem.de/index.php?msg=1314730 ",  
   "1.25.0" => "05.06.2024  transformed setter inverterStrings to attr setupInverterStrings, calcTodayPVdeviation: fix continuously calc again ",
   "1.24.0" => "03.06.2024  transformed setter currentInverterDev to attr setupInverterDev, calcTodayPVdeviation: fix continuously calc ",
   "1.23.0" => "02.06.2024  transformed setter currentBatteryDev to attr setupBatteryDev, _transferInverterValues: change output for DEBUG ".
@@ -10624,6 +10625,8 @@ sub calcTodayPVdeviation {
   }
   else {                                                     
       my $pvfcd = ReadingsNum ($name, 'RestOfDayPVforecast', 0) - $pvfc;      # PV Prognose bis jetzt
+      return if(!$pvfcd);                                                     # Illegal division by zero verhindern
+      
       $dp       = sprintf "%.2f", (100 - (100 * $pvre / abs $pvfcd));         # V 1.25.0
   }