uprava zbytecne setreni baterie a brani zadraho ze site

backend/tests/test_planning_dispatch_milp.py

@@ -1153,9 +1153,45 @@ class AutoPassiveSelfConsumptionTests(unittest.TestCase):
             0,
             msg="expensive slot should discharge for self-consumption before cheap charge",
         )
-        self.assertGreaterEqual(results[0].grid_setpoint_w, 0)
+        self.assertLessEqual(
+            results[0].grid_setpoint_w,
+            0,
+            msg="expensive slot: baseline load ze baterie, ne import ze sítě",
+        )
         self.assertEqual(results[0].deye_physical_mode, "PASSIVE")
 
+    def test_fixed_tariff_expensive_slot_discharges_not_grid_load(self) -> None:
+        """KV1 typ: konstantní buy — porovnání vůči charge_acquisition, ne min(buy)."""
+        slots = [
+            PlanningSlot(
+                interval_start=datetime(2026, 5, 21, 22, 0, tzinfo=timezone.utc),
+                buy_price=6.35,
+                sell_price=2.0,
+                pv_a_forecast_w=0,
+                pv_b_forecast_w=0,
+                load_baseline_w=320,
+                ev1_connected=False,
+                ev2_connected=False,
+                allow_charge=False,
+                allow_discharge_export=False,
+                charge_acquisition_buy_czk_kwh=0.55,
+            )
+        ]
+        battery = _battery(uc_wh=20_000.0, min_pct=10.0, arb_pct=20.0)
+        battery.planner_terminal_soc_value_factor = 0.0
+        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)
+        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 = 0.4 * battery.usable_capacity_wh
+        results, _, _ = solve_dispatch(
+            slots, battery, hp, grid, [None, None], vehicles, soc0, 50.0, operating_mode="AUTO"
+        )
+        self.assertLessEqual(results[0].grid_setpoint_w, 0)
+        self.assertLess(results[0].battery_setpoint_w, -100)
+
 
 class AutoPassiveNoLoadFollowingDischargeTests(unittest.TestCase):
     """AUTO bez allow_discharge_export: žádný export do sítě (Deye PASSIVE)."""