Branch 4: BA81 GEN cutoff audit + exekuce při sell<0

backend/services/control/deye_helpers.py

@@ -93,6 +93,27 @@ def _deye_reg178_verify_match(expected_i: int, actual_i: int) -> bool:
     )
 
 
+def deye_mi_export_cutoff_want_enabled(
+    *,
+    gen_microinverter_cutoff_enabled: bool,
+    deye_gen_cutoff_enabled: bool,
+    export_ban: bool,
+    deye_mode: str,
+) -> bool:
+    """
+    True = zapnout MI export cut-off (reg 178 bits 0–1 = 11b).
+
+    Plán může mít z_gen_cutoff=0 (PV B jen do domu v LP), ale bez cut-off na GEN portu
+    mikroinvertory fyzicky exportují do sítě — při export_ban (záporná vykupní, grid≥0)
+    cut-off vynutit i bez solver flagu.
+    """
+    if not gen_microinverter_cutoff_enabled:
+        return False
+    if deye_mode == "SELL":
+        return False
+    return bool(deye_gen_cutoff_enabled) or bool(export_ban)
+
+
 def deye_reg_triggers_self_sustain_after_verify_exhaust(reg: int) -> bool:
     """True = po 3x mismatch přepnout lokalitu do SELF_SUSTAIN (kritický registr)."""
     return int(reg) in DEYE_CRITICAL_REGS_SELF_SUSTAIN

backend/services/control/exporter_monolith.py

@@ -31,6 +31,7 @@ from services.control.deye_helpers import (
     battery_watts_to_amps,
     compute_pv_a_reg340_max_solar_w,
     current_slot_hhmm,
+    deye_mi_export_cutoff_want_enabled,
     deye_reg_triggers_self_sustain_after_verify_exhaust,  # noqa: F401 - re-export
     next_slot_hhmm,
     watts_to_amps,

backend/services/control/inverter.py

@@ -24,6 +24,7 @@ from services.control.deye_helpers import (
     REG178_VERIFY_MASK_COMBINED,
     _DEYE_INACTIVE_TOU_REGISTERS,
     _deye_should_skip_time_sync_after_read,
+    deye_mi_export_cutoff_want_enabled,
     _prague_minute_start_utc,
     current_slot_hhmm,
     next_slot_hhmm,
@@ -194,7 +195,12 @@ async def write_inverter_setpoints(
             current_178 = int(r178[0])
             peak_bits = int(reg178_val) & int(REG178_VERIFY_MASK)
             if inv.deye_gen_microinverter_cutoff_enabled:
-                want_cutoff = bool(setpoints_now.deye_gen_cutoff_enabled) and deye_mode != "SELL"
+                want_cutoff = deye_mi_export_cutoff_want_enabled(
+                    gen_microinverter_cutoff_enabled=True,
+                    deye_gen_cutoff_enabled=bool(setpoints_now.deye_gen_cutoff_enabled),
+                    export_ban=bool(setpoints_now.export_ban),
+                    deye_mode=deye_mode,
+                )
                 mi_bits = REG178_MI_EXPORT_ENABLE if want_cutoff else REG178_MI_EXPORT_DISABLE
             else:
                 mi_bits = int(current_178) & int(REG178_MI_EXPORT_MASK)

backend/services/control/setpoints.py

@@ -249,7 +249,7 @@ def _passive_no_export_guard(sp: ControlSetpoints) -> ControlSetpoints:
         deye_physical_mode="PASSIVE",
         export_mode="NONE",
         export_ban=True,
-        deye_gen_cutoff_enabled=sp.deye_gen_cutoff_enabled,
+        deye_gen_cutoff_enabled=True,
         effective_sell_price_czk_kwh=sp.effective_sell_price_czk_kwh,
         pv_a_allowed_w=sp.pv_a_allowed_w,
         lock_battery=sp.lock_battery,