baterie pri sell neklesne pod 20% ale pri normalnim provozu muze jit az k 10%, mame tak rezervu a neohrozime si nahly propad procent battery packu

backend/tests/test_planning_dispatch_milp.py

@@ -210,6 +210,54 @@ class PlanningDispatchMilpTests(unittest.TestCase):
         )
         self.assertGreaterEqual(results[0].grid_setpoint_w, 0)
 
+    def test_export_implies_end_soc_at_least_reserve(self) -> None:
+        """Při ge >= 1 W musí koncové soc[t] >= arb_base_wh (rezerva z DB)."""
+        slots = [
+            _slot(load=500, buy=2.0, sell=8.0, pv_a=0, pv_b=0),
+            _slot(load=500, buy=2.0, sell=8.0, pv_a=0, pv_b=0),
+        ]
+        battery = _battery(uc_wh=100_000.0, min_pct=10.0, arb_pct=20.0)
+        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=50_000, max_export_power_w=50_000)
+        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 = 0.22 * battery.usable_capacity_wh
+        results, _ms = solve_dispatch(
+            slots,
+            battery,
+            hp,
+            grid,
+            [None, None],
+            vehicles,
+            soc0,
+            50.0,
+            tuv_delta_stats=None,
+            operating_mode="AUTO",
+            price_failsafe_active=False,
+        )
+        reserve_pct = 20.0
+        for r in results:
+            if r.grid_setpoint_w < 0:
+                self.assertGreaterEqual(
+                    r.battery_soc_target,
+                    reserve_pct - 0.2,
+                    msg="export slot must end at or above reserve SoC",
+                )
+
 
 if __name__ == "__main__":
     unittest.main()