Departure-aware battery target only while the car can still charge (v3.0.2)

Counting the PV after a departure into the battery plan frees PV for the
car before it leaves. With the car already at its limit there is nothing to
free it for, and the battery was simply reserved less than it needs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: xchillxx

custom_components/surplus_pilot/manifest.json

@@ -9,5 +9,5 @@
   "iot_class": "local_polling",
   "issue_tracker": "https://github.com/xchillxx/surplus-pilot/issues",
   "requirements": [],
-  "version": "3.0.1"
+  "version": "3.0.2"
 }

custom_components/surplus_pilot/planner.py

@@ -186,7 +186,9 @@ def battery_target_kw(inp: Inputs, dep: Departure | None) -> tuple[float, str]:
     hours_left = (inp.pv_end - inp.now).total_seconds() / 3600.0
     target = min(BATTERY_MAX_TARGET_KW, missing / max(hours_left, MIN_HOURS_LEFT))
     mode = "frist"
-    car_home = inp.car is not None and inp.car.present
+    # only worth it while the car can still use the PV it frees up
+    car_home = inp.car is not None and inp.car.present and (
+        inp.car.soc is None or inp.car.soc < inp.car.limit_soc)
     if dep is not None and car_home and inp.now < dep.start < inp.pv_end and inp.forecast:
         after = forecast_kwh(inp.forecast, dep.start, inp.pv_end) * FORECAST_SAFETY
         h_dep = (dep.start - inp.now).total_seconds() / 3600.0

tests/test_planner.py

@@ -72,3 +72,17 @@ def test_slots_rhythm_and_oneoff():
     starts = [d.start.strftime("%m-%d %H:%M") for d in deps]
     assert starts == ["10-06 16:30", "10-08 09:00"]  # every 4 days: next one 10-10, beyond the 4-day horizon
     assert deps[0].returns == deps[0].start + timedelta(hours=14)
+
+
+def test_departure_battery_mode_only_while_car_can_charge():
+    now = datetime(2026, 10, 6, 14, 0, tzinfo=TZ)
+    dep = P.Departure(start=now.replace(hour=16, minute=30), target_soc=50.0)
+    fc = [P.ForecastHour(end=now.replace(hour=0) + timedelta(hours=h), kwh=6.0 if 10 <= h <= 17 else 0.0)
+          for h in range(24)]
+    full = P.CarInput(present=True, soc=80.0, limit_soc=80.0, capacity_kwh=72.9, efficiency=0.9, min_kw=3.45,
+                      max_kw=11.04)
+    plan = P.make_plan(base_inputs(now, pv_kw=6.0, battery_soc=80.0, car=full, departures=[dep], forecast=fc))
+    assert plan.battery_mode == "frist"
+    half = P.CarInput(**{**full.__dict__, "soc": 60.0})
+    plan = P.make_plan(base_inputs(now, pv_kw=6.0, battery_soc=80.0, car=half, departures=[dep], forecast=fc))
+    assert plan.battery_mode == "abfahrt"