diff --git a/Bat_EV_SDL_V4/form.json b/Bat_EV_SDL_V4/form.json
index 8d09e7b..499fa6c 100644
--- a/Bat_EV_SDL_V4/form.json
+++ b/Bat_EV_SDL_V4/form.json
@@ -93,6 +93,19 @@
           "edit": {
             "type": "SelectVariable"
           }
+        },
+        {
+        "caption": "Min. SoC",
+        "name": "minPhysicalSocPct",
+        "width": "100px",
+        "suffix": " %",
+        "add": 5,
+        "edit": {
+            "type": "NumberSpinner",
+            "minimum": 0,
+            "maximum": 30,
+            "digits": 1
+        }
         }
       ],
       "values": []
diff --git a/Bat_EV_SDL_V4/module.php b/Bat_EV_SDL_V4/module.php
index fce8ad7..685de36 100644
--- a/Bat_EV_SDL_V4/module.php
+++ b/Bat_EV_SDL_V4/module.php
@@ -225,6 +225,8 @@ class Bat_EV_SDL_V4 extends IPSModule
             $pBatW  = max(0.0, (float)($b["powerbat"] ?? 0));
             $pBatKW = $pBatW / 1000.0;
             $capKWh = max(0.0, (float)($b["capazity"] ?? 0));
+            $minPhysicalSocPct = max(0.0, min(100.0, (float)($b["minPhysicalSocPct"] ?? 5.0)));
+            $minPhysicalKWh = $capKWh * $minPhysicalSocPct / 100.0;
 
             if ($capKWh <= 0.0 || $pBatKW <= 0.0) {
                 continue;
@@ -239,12 +241,14 @@ class Bat_EV_SDL_V4 extends IPSModule
             $evShareKW_laden = max(0.0, $pBatKW - $sdlShareKW_laden);
             $evShareKW_entladen = max(0.0, $pBatKW - $sdlShareKW_entladen);
 
-            // Grenzen: individuell nach Reservezeit.
-            $underKWh = $sdlShareKW_entladen * $reserveH;
-            $upKWh    = $capKWh - ($sdlShareKW_laden * $reserveH);
+            $sdlLowerKWh = $sdlShareKW_entladen * $reserveH;
+            $sdlUpperKWh = $sdlShareKW_laden * $reserveH;
 
-            $underKWh = max(0.0, min($capKWh, $underKWh));
-            $upKWh = max(0.0, min($capKWh, $upKWh));
+            $underKWh = $minPhysicalKWh + $sdlLowerKWh;
+            $upKWh    = $capKWh - $sdlUpperKWh;
+
+            $underKWh = max($minPhysicalKWh, min($capKWh, $underKWh));
+            $upKWh    = max($minPhysicalKWh, min($capKWh, $upKWh));
 
             // Falls Reserve zu groß ist, EV-Fenster sauber auf 0 setzen.
             if ($upKWh < $underKWh) {
@@ -253,10 +257,8 @@ class Bat_EV_SDL_V4 extends IPSModule
                 $upKWh = $mid;
             }
 
-            $sdlLowerKWh = $underKWh;
-            $sdlUpperKWh = $capKWh - $upKWh;
             $SDL_kWh = max(0.0, $sdlLowerKWh + $sdlUpperKWh);
-            $EV_kWh = max(0.0, $capKWh - $SDL_kWh);
+            $EV_kWh  = max(0.0, $upKWh - $underKWh);
 
             $realSocPct = $this->ReadSocPercent($socVarId);
             $realKWh = $capKWh * $realSocPct / 100.0;
@@ -268,6 +270,11 @@ class Bat_EV_SDL_V4 extends IPSModule
                 "capKWh" => $capKWh,
                 "pBatW" => $pBatW,
 
+                "minPhysicalSocPct" => $minPhysicalSocPct,
+                "minPhysicalKWh" => $minPhysicalKWh,
+                "sdlLowerKWh" => $sdlLowerKWh,
+                "sdlUpperKWh" => $sdlUpperKWh,
+
                 "underKWh" => $underKWh,
                 "upKWh" => $upKWh,
                 "SDL_kWh_total" => $SDL_kWh,