Feature: Kathrein Wallbox + EMS-Controller (v1.5.0)

- wallbox_client.py: WallboxReader FC03, EMS enable/set_current
- ems_controller.py: PV-Überschussladen + 4h-Timeout Zwangsladen bis 06:00
- inverters.py: KATHREIN_WALLBOX mit 18 Sensoren (Meter + EVSE + EMS)
- main.py: kathrein-Protokollzweig, _get_pv_surplus() aus laufenden Geräten

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

haos-addon/src/main.py

@@ -13,6 +13,8 @@ from inverters import INVERTERS
 import history
 from modbus_client import ModbusReader
 from goodwe_client import GoodweReader
+from wallbox_client import WallboxReader
+from ems_controller import EmsController
 from mqtt_publisher import MqttPublisher
 
 logging.basicConfig(
@@ -139,6 +141,29 @@ def _compute_aggregates() -> Dict[str, float]:
             )
     return result
 
+# ── EMS Hilfsfunktionen ───────────────────────────────────────
+
+def _get_pv_surplus() -> float:
+    """PV-Überschuss in Watt aus laufenden Geräten ermitteln.
+    Goodwe: active_power negativ = Einspeisung (Überschuss).
+    Growatt: power_to_grid positiv = Einspeisung.
+    """
+    surplus = 0.0
+    with State.lock:
+        for inv_cfg in State.inverters_cfg:
+            d = State.inv_data.get(inv_cfg["id"], {})
+            if not d.get("modbus_ok") or not d.get("values"):
+                continue
+            v = d["values"]
+            # Goodwe: active_power < 0 bedeutet Einspeisung
+            if "active_power" in v:
+                surplus += max(0.0, -v["active_power"])
+            # Growatt
+            if "power_to_grid" in v:
+                surplus += max(0.0, v["power_to_grid"])
+    return surplus
+
+
 # ── Poll Loop ─────────────────────────────────────────────────
 
 def _poll_loop(inv_cfg: Dict[str, Any], stop: threading.Event):
@@ -156,10 +181,16 @@ def _poll_loop(inv_cfg: Dict[str, Any], stop: threading.Event):
         return
 
     host = inv_cfg["modbus_ip"]
+    ems: Optional[EmsController] = None
     if inverter.protocol == "goodwe_udp":
         reader = GoodweReader(host=host, family=inverter.goodwe_family)
         log.info("[%s] Poll-Loop: %s @ %s (Goodwe UDP/8899) alle %ds",
                  inv_id, inverter.name, host, interval)
+    elif inverter.protocol == "kathrein":
+        reader = WallboxReader(host=host, port=port)
+        ems = EmsController()
+        log.info("[%s] Poll-Loop: %s @ %s:%s (Kathrein EMS) alle %ds",
+                 inv_id, inverter.name, host, port, interval)
     else:
         reader = ModbusReader(host=host, port=port, slave=slave)
         log.info("[%s] Poll-Loop: %s @ %s:%s alle %ds",
@@ -184,6 +215,15 @@ def _poll_loop(inv_cfg: Dict[str, Any], stop: threading.Event):
     while not stop.is_set():
         t0 = time.time()
         values = reader.read(inverter)
+
+        # EMS: PV-Überschuss aus anderen Geräten holen und Ladestrom regeln
+        if ems is not None and values is not None:
+            pv_surplus = _get_pv_surplus()
+            charging_state = int(values.get("charging_state", 0))
+            ems_status = ems.update(reader, pv_surplus, charging_state)
+            values["ems_status_code"] = float(charging_state)
+            log.debug("[%s] EMS: %s", inv_id, ems_status)
+
         with State.lock:
             d = State.inv_data.setdefault(inv_id, {"poll_count": 0})
             if values is not None: