fix rs485 s eror self_sustain

backend/tests/test_control_exporter_tou.py

@@ -3,11 +3,15 @@
 from __future__ import annotations
 
 import unittest
+from dataclasses import replace
 
 from services.control_exporter import (
     ControlSetpoints,
     InverterConfig,
+    _deye_reg178_verify_with_double_read,
     _deye_tou_params,
+    _deye_tou_power_verify_match,
+    deye_reg_triggers_self_sustain_after_verify_exhaust,
     get_deye_mode,
 )
 
@@ -33,6 +37,29 @@ def _inv(*, min_soc: int | None = 12, reserve_soc: int | None = 20) -> InverterC
     )
 
 
+def _inv_350a() -> InverterConfig:
+    """350 A × 51.2 V = 17920 W — typický firmware clamp pro TOU power."""
+    return replace(_inv(), max_charge_a=350, max_discharge_a=350)
+
+
+class ModbusVerifyPolicyTests(unittest.TestCase):
+    def test_tou_power_accepts_firmware_max_w_clamp(self) -> None:
+        inv = _inv_350a()
+        self.assertTrue(_deye_tou_power_verify_match(7752, 17920, inv))
+        self.assertTrue(_deye_tou_power_verify_match(16728, 17920, inv))
+
+    def test_reg178_double_read_recovers_from_glitch(self) -> None:
+        ok, v = _deye_reg178_verify_with_double_read(48, 12014, 48)
+        self.assertTrue(ok)
+        self.assertEqual(v, 48)
+
+    def test_reg178_not_critical_for_self_sustain(self) -> None:
+        self.assertFalse(deye_reg_triggers_self_sustain_after_verify_exhaust(178))
+
+    def test_reg108_critical_for_self_sustain(self) -> None:
+        self.assertTrue(deye_reg_triggers_self_sustain_after_verify_exhaust(108))
+
+
 class DeyeTouParamsTests(unittest.TestCase):
     def test_sell_uses_reserve_soc(self) -> None:
         sp = ControlSetpoints(