diff --git a/Bat_EV_SDL _V2/module.php b/Bat_EV_SDL _V2/module.php
index cfe16d3..80fab97 100644
--- a/Bat_EV_SDL _V2/module.php	
+++ b/Bat_EV_SDL _V2/module.php	
@@ -155,8 +155,23 @@ class Bat_EV_SDL_V2 extends IPSModule
                 // --- Deine 3 Fälle ---
                 if ($underKWh <= $real_kWh && $upKWh >= $real_kWh) {
 
-                    $SDL_SOC = 100 / ($capKWh - $upKWh + $underKWh) * $underKWh;
-                    $EV_SOC = 100 / $EV_kWh * ($real_kWh - $underKWh);
+                    
+                $denSDL = ($capKWh - $upKWh + $underKWh);
+                if ($denSDL > 0.0) {
+                    $SDL_SOC = 100.0 * $underKWh / $denSDL;
+                } else {
+                    $SDL_SOC = 0.0;
+                }
+                $SDL_SOC = is_finite($SDL_SOC) ? max(0.0, min(100.0, $SDL_SOC)) : 0.0;
+
+                    
+                    if ($EV_kWh > 0.0) {
+                        $EV_SOC = 100.0 * ($real_kWh - $underKWh) / $EV_kWh;
+                    } else {
+                        $EV_SOC = 0.0; // definierter Fallback
+                    }
+                    $EV_SOC = is_finite($EV_SOC) ? max(0.0, min(100.0, $EV_SOC)) : 0.0;
+
                     
                     
 
@@ -172,8 +187,14 @@ class Bat_EV_SDL_V2 extends IPSModule
 
                     $EV_SOC = 100.0;
 
-                    $den = ($capKWh - $real_kWh + $underKWh);
-                    $SDL_SOC = ($den > 0.0 && $underKWh > 0.0) ? ($den / (2.0 * $underKWh) * 100.0) : 0.0;
+                    $den1 = ($capKWh - $real_kWh + $underKWh);
+                    $den2 = (2.0 * $underKWh);
+                    if ($den1 > 0.0 && $den2 > 0.0) {
+                        $SDL_SOC = ($den1 / $den2) * 100.0;
+                    } else {
+                        $SDL_SOC = 0.0;
+                    }
+                    $SDL_SOC = is_finite($SDL_SOC) ? max(0.0, min(100.0, $SDL_SOC)) : 0.0;
 
                     $sdlDisKW = $sdlShareKW_entladen;
                     $evDisKW  = $evShareKW_entladen;
@@ -189,6 +210,7 @@ class Bat_EV_SDL_V2 extends IPSModule
 
                     $den = $upKWh + $underKWh;
                     $SDL_SOC = ($den > 0.0) ? ($real_kWh * 100.0 / $den) : 0.0;
+                    $SDL_SOC = is_finite($SDL_SOC) ? max(0.0, min(100.0, $SDL_SOC)) : 0.0;
 
                     $sdlDisKW = $sdlShareKW_entladen;
                     $evDisKW  = 0.0;