deye ridi maximalni flow do baterie hlavne z gridu

backend/services/planning_engine.py

@@ -429,7 +429,14 @@ def solve_dispatch(
         )
 
     # --- Proměnné ---
-    gi  = [pulp.LpVariable(f"gi_{t}",  0, grid.max_import_power_w)         for t in range(T)]
+    # gi[t] horní mez: site breaker (max_import_power_w) je fyzický strop, ale o jeho dodržení
+    # se v reálném čase stará **Deye reg 128** (grid charge current) + firmware throttling —
+    # dynamicky sníží nabíjení baterie, když aktuální `load + bc` přesáhne breaker. Proto LP
+    # povolí nominálně import až **breaker + BMS max charge**, aby mohl plánovat `bc = BMS max`
+    # i v slotech s vyšší baseline zátěží (jinak tvrdý strop zbytečně osekává arbitráž v cenově
+    # nejlepších 15min oknech). Reálný hardware nikdy víc než breaker nenatáhne.
+    gi_upper = float(grid.max_import_power_w) + float(battery.max_charge_power_w)
+    gi  = [pulp.LpVariable(f"gi_{t}",  0, gi_upper)                        for t in range(T)]
     ge  = [pulp.LpVariable(f"ge_{t}",  0, grid.max_export_power_w)         for t in range(T)]
     bc  = [pulp.LpVariable(f"bc_{t}",  0, battery.max_charge_power_w)      for t in range(T)]
     bd  = [pulp.LpVariable(f"bd_{t}",  0, battery.max_discharge_power_w)   for t in range(T)]

backend/tests/test_planning_dispatch_milp.py

@@ -259,5 +259,58 @@ class PlanningDispatchMilpTests(unittest.TestCase):
                 )
 
 
+    def test_grid_import_cap_allows_full_bms_charge_above_breaker(self) -> None:
+        """
+        Cheap buy, load 3.7 kW, PV malé → breaker 17 kW limituje gi, ale bc musí moct být
+        plných BMS 18 kW (Deye reg 128 + firmware throttling chrání jistič fyzicky).
+        """
+        slots = [
+            _slot(load=3700, buy=0.4, sell=-0.3, pv_a=0, pv_b=1500),
+            _slot(load=2000, buy=5.0, sell=4.5, pv_a=0, pv_b=0),
+            _slot(load=2000, buy=5.0, sell=4.5, pv_a=0, pv_b=0),
+        ]
+        battery = _battery(uc_wh=64_000.0, min_pct=12.0, arb_pct=20.0)
+        battery.max_charge_power_w = 18_000
+        battery.max_discharge_power_w = 18_000
+        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=13_500)
+        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 = 0.55 * 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,
+        )
+        self.assertEqual(len(results), 3)
+        self.assertGreaterEqual(
+            results[0].battery_setpoint_w,
+            17_500,
+            msg="LP must be able to target near-BMS-max charge even when gi would exceed breaker",
+        )
+
+
 if __name__ == "__main__":
     unittest.main()