dalsi

backend/tests/test_planning_dispatch_milp.py

@@ -1833,6 +1833,88 @@ class NegativeSellPvChargeTests(unittest.TestCase):
             "sell nad min horizontu: žádné grid nabíjení",
         )
 
+    def test_kv1_fixed_night_uses_battery_not_grid_import(self) -> None:
+        """v62: po večerním push nocí bd≥load, ne import za fixní buy."""
+        prague = ZoneInfo("Europe/Prague")
+        push = PlanningSlot(
+            interval_start=datetime(2026, 6, 1, 18, 45, tzinfo=prague).astimezone(
+                timezone.utc
+            ),
+            buy_price=6.353,
+            sell_price=9.61,
+            pv_a_forecast_w=0,
+            pv_b_forecast_w=0,
+            load_baseline_w=400,
+            ev1_connected=False,
+            ev2_connected=False,
+            allow_charge=False,
+            allow_discharge_export=True,
+            charge_acquisition_buy_czk_kwh=6.353,
+        )
+        night = PlanningSlot(
+            interval_start=datetime(2026, 6, 1, 23, 0, tzinfo=prague).astimezone(
+                timezone.utc
+            ),
+            buy_price=6.353,
+            sell_price=3.09,
+            pv_a_forecast_w=0,
+            pv_b_forecast_w=0,
+            load_baseline_w=800,
+            ev1_connected=False,
+            ev2_connected=False,
+            allow_charge=False,
+            allow_discharge_export=False,
+            charge_acquisition_buy_czk_kwh=6.353,
+        )
+        battery = _battery(uc_wh=12_500.0, min_pct=10.0, arb_pct=30.0)
+        battery.max_discharge_power_w = 6250
+        hp = SimpleNamespace(
+            rated_heating_power_w=0,
+            tuv_min_temp_c=45.0,
+            tuv_target_temp_c=55.0,
+        )
+        grid = SimpleNamespace(
+            max_import_power_w=17_000,
+            max_export_power_w=8000,
+            block_export_on_negative_sell=True,
+            purchase_pricing_mode="fixed",
+        )
+        vehicles = [
+            SimpleNamespace(
+                max_charge_power_w=0,
+                battery_capacity_kwh=1.0,
+                default_target_soc_pct=80.0,
+            ),
+            SimpleNamespace(
+                max_charge_power_w=0,
+                battery_capacity_kwh=1.0,
+                default_target_soc_pct=80.0,
+            ),
+        ]
+        soc0 = 0.35 * battery.usable_capacity_wh
+        results, _, _ = solve_dispatch(
+            [push, night],
+            battery,
+            hp,
+            grid,
+            [None, None],
+            vehicles,
+            soc0,
+            50.0,
+            operating_mode="AUTO",
+        )
+        r_night = results[1]
+        self.assertLess(
+            r_night.battery_setpoint_w,
+            -200,
+            "noc po push: výdej z baterie na dům",
+        )
+        self.assertLessEqual(
+            r_night.grid_setpoint_w,
+            400,
+            "noc: ne plný import za 6,35 Kč",
+        )
+
     def test_fixed_evening_push_no_charge_at_peak_sell(self) -> None:
         """v59: večerní push — při sell>buy ne nabíjet, jen vybíjet."""
         prague = ZoneInfo("Europe/Prague")