diff --git a/haos-addon/config.yaml b/haos-addon/config.yaml
index 4d7af5f..9745f44 100644
--- a/haos-addon/config.yaml
+++ b/haos-addon/config.yaml
@@ -1,5 +1,5 @@
 name: ShineBridge
-version: "1.7.4"
+version: "1.7.5"
 slug: shinebridge
 description: Growatt Wechselrichter lokal in Home Assistant — Modbus TCP via ShineLAN-X, MQTT Discovery, Web UI
 url: https://gitea.bitfire.work/retr0/shinebridge
diff --git a/haos-addon/src/main.py b/haos-addon/src/main.py
index 56ab615..d047bbb 100644
--- a/haos-addon/src/main.py
+++ b/haos-addon/src/main.py
@@ -245,13 +245,20 @@ def _poll_loop(inv_cfg: Dict[str, Any], stop: threading.Event):
         if values and "grid_power" not in values and "import_kwh" in values and "total_power" in values:
             values["grid_power"] = values["total_power"]
 
-        # Growatt SPH: beide Batterie-Register können gleichzeitig != 0 sein (Messartefakt).
-        # Batterie kann physikalisch nur laden ODER entladen — kleineren Wert auf 0 setzen.
-        if values and "bat_charge_power" in values and "bat_discharge_power" in values:
-            if values["bat_charge_power"] >= values["bat_discharge_power"]:
+        # Growatt SPH: Register 1009/1011 für Batterie sind unzuverlässig (Messartefakt).
+        # Batterie-Nettoleistung wird stattdessen aus der Energiebilanz abgeleitet:
+        #   bat_net = PV + grid_import - grid_export - ac_power_total
+        # Alle vier Quellen sind direkt gemessene, verlässliche Register.
+        if values and all(k in values for k in ("pv1_power", "ac_power_total",
+                                                  "power_to_user", "power_to_grid")):
+            pv = values.get("pv1_power", 0) + values.get("pv2_power", 0)
+            bat_net = pv + values["power_to_user"] - values["power_to_grid"] - values["ac_power_total"]
+            if bat_net >= 0:
+                values["bat_charge_power"]    = round(bat_net, 1)
                 values["bat_discharge_power"] = 0.0
             else:
-                values["bat_charge_power"] = 0.0
+                values["bat_discharge_power"] = round(-bat_net, 1)
+                values["bat_charge_power"]    = 0.0
 
         # EMS: PV-Überschuss aus anderen Geräten holen und Ladestrom regeln
         if ems is not None and values is not None: