diff --git a/Bat_EV_SDL_V3_Beta/form.json b/Bat_EV_SDL_V3_Beta/form.json
index 9a50854..66a24d5 100644
--- a/Bat_EV_SDL_V3_Beta/form.json
+++ b/Bat_EV_SDL_V3_Beta/form.json
@@ -104,9 +104,9 @@
         "type": "NumberSpinner",
         "name": "UpdateInterval",
         "caption": "Neuberechnung alle",
-        "suffix": "Sekunden",
-        "minimum": 0,
-        "maximum": 86400
+        "suffix": "Miliskeunden",
+        "minimum": 200,
+        "maximum": 100000
     }
     ]
 }
diff --git a/Bat_EV_SDL_V3_Beta/module.php b/Bat_EV_SDL_V3_Beta/module.php
index 289f4f5..4b73ef3 100644
--- a/Bat_EV_SDL_V3_Beta/module.php
+++ b/Bat_EV_SDL_V3_Beta/module.php
@@ -13,7 +13,7 @@ class Bat_EV_SDL_V3_Beta extends IPSModule
         //$this->RegisterPropertyInteger("$upKWh + $underKWh)", 0);   
         $this->RegisterPropertyInteger("SDL_Leistung_Laden", 0);  
         $this->RegisterPropertyInteger("SDL_Leistung_Entladen", 0);    // W
-        $this->RegisterPropertyInteger("UpdateInterval", 5);   // Minuten
+        $this->RegisterPropertyInteger("UpdateInterval", 2000);   // Minuten
 
         // Status
         $this->RegisterVariableBoolean("State", "Aktiv", "~Switch", 1);
@@ -45,7 +45,7 @@ class Bat_EV_SDL_V3_Beta extends IPSModule
         parent::ApplyChanges();
 
         $intervalSec = (int)$this->ReadPropertyInteger("UpdateInterval");
-        $this->SetTimerInterval("UpdateTimer", ($intervalSec > 0) ? $intervalSec * 1000 : 0);
+        $this->SetTimerInterval("UpdateTimer", ($intervalSec > 0) ? $intervalSec : 0);
 
         // Cache neu bauen (force)
         $this->BuildBatteryCache(true);
@@ -95,16 +95,21 @@ class Bat_EV_SDL_V3_Beta extends IPSModule
         // Integrator: State laden
         // =====================
         // Optional für 2s besser: microtime(true) statt time() verwenden
-        $now = time();
 
-        $lastTs   = (int)$this->GetBufferSafe("Int_LastTs");
-        $lastPEV  = (float)$this->GetBufferSafe("Int_LastP_EV_W");     // W (+ laden, - entladen)
-        $lastPSDL = (float)$this->GetBufferSafe("Int_LastP_SDL_W");    // W (+ laden, - entladen)
+        // Millisekunden-genau: microtime(true) liefert Sekunden als Float
+        $now = microtime(true);
 
-        $Eev  = (float)$this->GetBufferSafe("Int_E_EV_kWh");           // kWh-Konto EV
-        $Esdl = (float)$this->GetBufferSafe("Int_E_SDL_kWh");          // kWh-Konto SDL
+        // Timestamp als Float aus Buffer lesen (nicht int!)
+        $lastTs = (float)$this->GetBufferSafe("Int_LastTs");
 
-        if ($lastTs <= 0) {
+        // Leistungen / Konten wie gehabt
+        $lastPEV  = (float)$this->GetBufferSafe("Int_LastP_EV_W");   // W (+ laden, - entladen)
+        $lastPSDL = (float)$this->GetBufferSafe("Int_LastP_SDL_W");  // W (+ laden, - entladen)
+
+        $Eev  = (float)$this->GetBufferSafe("Int_E_EV_kWh");         // kWh-Konto EV
+        $Esdl = (float)$this->GetBufferSafe("Int_E_SDL_kWh");        // kWh-Konto SDL
+
+        if ($lastTs <= 0.0) {
             $lastTs = $now;
             $lastPEV = 0.0;
             $lastPSDL = 0.0;
@@ -112,7 +117,15 @@ class Bat_EV_SDL_V3_Beta extends IPSModule
             $Esdl = 0.0;
         }
 
-        $dtH = ($now - $lastTs) / 3600.0; // Stunden
+        // dt in Sekunden (Float) und Stunden
+        $dtSec = $now - $lastTs;
+        if ($dtSec < 0.0) $dtSec = 0.0;
+
+        // Sicherheitskappe bei Aussetzern (optional: z.B. max 10s)
+        if ($dtSec > 10.0) $dtSec = 10.0;
+
+        $dtH = $dtSec / 3600.0;
+
         if ($dtH < 0) $dtH = 0.0;
         if ($dtH > 1.0) $dtH = 1.0;       // Sicherheitskappe