fix ranniho neprodeje do site

backend/tests/test_control_exporter_tou.py

@@ -15,7 +15,11 @@ from services.control.exporter_monolith import (
     get_deye_mode,
 )
 from services.control.models import OperatingModeInfo
-from services.control.setpoints import _build_setpoints, _deye_zero_export_amps_for_passive
+from services.control.setpoints import (
+    _build_setpoints,
+    _deye_reg142_limit_control,
+    _deye_zero_export_amps_for_passive,
+)
 
 
 def _inv(*, min_soc: int | None = 12, reserve_soc: int | None = 20) -> InverterConfig:
@@ -111,6 +115,43 @@ class DeyeTouParamsTests(unittest.TestCase):
         )
         self.assertEqual(get_deye_mode(sp), "PASSIVE")
 
+    def test_reg142_pv_surplus_on_ct_site_uses_selling_first(self) -> None:
+        """KV1/BA81: PASSIVE + plánovaný export FVE nesmí nechat reg142=2 (zero export CT)."""
+        self.assertEqual(
+            _deye_reg142_limit_control(
+                deye_mode="PASSIVE",
+                grid_w=-3000,
+                export_ban=False,
+                export_mode="PV_SURPLUS",
+                zero_export_mode=2,
+            ),
+            0,
+        )
+
+    def test_reg142_no_export_when_export_ban(self) -> None:
+        self.assertEqual(
+            _deye_reg142_limit_control(
+                deye_mode="PASSIVE",
+                grid_w=-1000,
+                export_ban=True,
+                export_mode="PV_SURPLUS",
+                zero_export_mode=2,
+            ),
+            2,
+        )
+
+    def test_reg142_legacy_negative_grid_without_export_mode(self) -> None:
+        self.assertEqual(
+            _deye_reg142_limit_control(
+                deye_mode="PASSIVE",
+                grid_w=-2500,
+                export_ban=False,
+                export_mode=None,
+                zero_export_mode=2,
+            ),
+            0,
+        )
+
     def test_build_setpoints_uses_explicit_export_limit(self) -> None:
         mode = OperatingModeInfo(
             mode_code="AUTO",