diff --git a/Bat_EV_SDL_V3_Beta/module.php b/Bat_EV_SDL_V3_Beta/module.php
index 8b13ab4..feb45be 100644
--- a/Bat_EV_SDL_V3_Beta/module.php
+++ b/Bat_EV_SDL_V3_Beta/module.php
@@ -116,6 +116,23 @@ class Bat_EV_SDL_V3_Beta extends IPSModule
         $EV_kWh_ges  = 0.0;
         $totalCapKWh = 0.0;
 
+        // SDL-Gesamtkapazität aus Cache vorab berechnen
+        $SDL_kWh_ges_cfg = 0.0;
+
+        foreach ($cache["bats"] as $bc) {
+            $SDL_kWh_ges_cfg += (float)($bc["SDL_kWh_total"] ?? 0.0);
+        }
+
+        // aktueller virtueller SDL-Stand
+        $sdlVirtPct = ($SDL_kWh_ges_cfg > 0.0)
+            ? ($Esdl_kWh / $SDL_kWh_ges_cfg * 100.0)
+            : 0.0;
+
+        $sdlVirtPct = max(0.0, min(100.0, $sdlVirtPct));
+
+        $sdlIsEmpty = ($sdlVirtPct <= 0.1);
+        $sdlIsFull  = ($sdlVirtPct >= 99.9);
+
         foreach ($cache["bats"] as $i => $c) {
 
             $capKWh = (float)($c["capKWh"] ?? 0.0);
@@ -133,6 +150,24 @@ class Bat_EV_SDL_V3_Beta extends IPSModule
             $typ      = (string)($c["typ"] ?? ("Bat " . ($i + 1)));
             $underKWh = (float)($c["underKWh"] ?? 0.0);
             $upKWh    = (float)($c["upKWh"] ?? 0.0);
+
+            // Standard: EV darf nur zwischen underKWh und upKWh arbeiten
+            $evUnderKWh = $underKWh;
+            $evUpKWh    = $upKWh;
+
+            // Wenn SDL virtuell leer ist, darf EV die untere SDL-Reserve verwenden
+            if ($sdlIsEmpty) {
+                $evUnderKWh = 0.0;
+            }
+
+            // Wenn SDL virtuell voll ist, darf EV die obere SDL-Reserve verwenden
+            if ($sdlIsFull) {
+                $evUpKWh = $capKWh;
+            }
+
+            $evWindowKWh = max(0.0, $evUpKWh - $evUnderKWh);
+
+
             $SDL_kWh  = (float)($c["SDL_kWh_total"] ?? 0.0);
             $EV_kWh   = (float)($c["EV_kWh_total"] ?? 0.0);
 
@@ -155,8 +190,8 @@ class Bat_EV_SDL_V3_Beta extends IPSModule
             if ($underKWh <= $real_kWh && $real_kWh <= $upKWh) {
 
                 // EV_SOC im Fenster dynamisch (0..100)
-                if ($EV_kWh > 0.0) {
-                    $EV_SOC = 100.0 * ($real_kWh - $underKWh) / $EV_kWh;
+                if ($evWindowKWh > 0.0) {
+                    $EV_SOC = 100.0 * ($real_kWh - $evUnderKWh) / $evWindowKWh;
                 } else {
                     $EV_SOC = 0.0;
                 }
@@ -176,10 +211,10 @@ class Bat_EV_SDL_V3_Beta extends IPSModule
                 $sdlChKW  = $sdlShareKW_laden;
                 $evChKW   = $evShareKW_laden;
 
-                $real_kWh_ev  = $real_kWh - $underKWh;
-                $real_kWh_sdl = $underKWh;
+                $real_kWh_ev  = max(0.0, min($evWindowKWh, $real_kWh - $evUnderKWh));
+                $real_kWh_sdl = $real_kWh - $real_kWh_ev;
 
-            } elseif ($real_kWh > $upKWh) {
+            } elseif ($real_kWh > $evUpKWh) {
 
                 // Obere Grenze: EV = 100%
                 $EV_SOC = 100.0;
@@ -202,7 +237,7 @@ class Bat_EV_SDL_V3_Beta extends IPSModule
                 $real_kWh_ev  = $capKWh - ($capKWh - $upKWh + $underKWh);
                 $real_kWh_sdl = ($capKWh - $upKWh + $underKWh) - ($capKWh - $real_kWh);
 
-            } else { // $real_kWh < $underKWh
+            } elseif ($real_kWh < $evUnderKWh) {
 
                 // Untere Grenze: EV = 0%
                 $EV_SOC = 0.0;