dalsi fix

backend/services/planning_engine.py

@@ -59,7 +59,7 @@ NEG_SELL_CURTAIL_PENALTY_CZK_KWH = 1.0
 NEG_SELL_PV_CHARGE_REWARD_CZK_KWH = 0.8
 # Měkký tlak: v okně sell<0 dobít na soc_max (ne zastavit na ~94 % kvůli curtail).
 NEG_SELL_SOC_UNDERFILL_PENALTY_CZK_PER_WH = 0.35
-PLANNER_BUILD_TAG = "2026-05-24-ba81-gen-cutoff-v6"
+PLANNER_BUILD_TAG = "2026-05-24-ba81-soc-headroom-v7"
 CORRECTION_WINDOW_H  = 1        # hodina zpět pro výpočet korekčního faktoru
 CORRECTION_MIN_CLAMP = 0.5      # spodní limit korekčního faktoru
 CORRECTION_MAX_CLAMP = 1.5      # horní limit korekčního faktoru
@@ -836,6 +836,28 @@ def _evening_battery_export_push_indices(
     return sorted(out)
 
 
+def _planner_soc_for_solver(
+    current_soc_wh: float,
+    battery,
+) -> tuple[float, float | None]:
+    """
+    SoC pro MILP. Při telemetrii na soc_max a dlouhém sell<0 s vysokou FVE bez rezervy pod stropem
+    je model neřešitelný (nelze nabít / odvést přebytek). Necháme min. ~650 Wh pod soc_max.
+    """
+    soc_max = float(battery.soc_max_wh)
+    soc_min = float(battery.min_soc_wh)
+    soc = max(soc_min, min(float(current_soc_wh), soc_max))
+    charge_slot_wh = (
+        float(battery.max_charge_power_w)
+        * INTERVAL_H
+        / max(float(battery.charge_efficiency), 1e-6)
+    )
+    headroom = max(650.0, 0.382 * charge_slot_wh)
+    if soc > soc_max - headroom:
+        return max(soc_min, soc_max - headroom), headroom
+    return soc, None
+
+
 def _pv_forced_vent_export_allowed(
     t: int,
     *,
@@ -1002,7 +1024,10 @@ def solve_dispatch(
             else float(sm)
             for i, sm in enumerate(soc_min_series)
         ]
-    current_soc_wh = float(current_soc_wh)
+    soc_headroom_applied_wh: float | None = None
+    current_soc_wh, soc_headroom_applied_wh = _planner_soc_for_solver(
+        current_soc_wh, battery
+    )
     current_soc_wh = max(soc_min_series[0], min(current_soc_wh, float(battery.soc_max_wh)))
     arb_base_wh = max(
         float(getattr(battery, "arb_floor_wh", battery.reserve_soc_wh)),
@@ -2078,6 +2103,7 @@ def solve_dispatch(
         "planner_build_tag": PLANNER_BUILD_TAG,
         "inputs": {
             "current_soc_wh": float(current_soc_wh),
+            "soc_headroom_applied_wh": soc_headroom_applied_wh,
             "operating_mode": operating_mode,
             "planner_version": planner_version_resolved,
             "battery": {