OPT-11 P4 review: Cheap hours ignores the plan; midnight-stale forecast; stricter ids

- Cheap hours only fills to the ceiling with or without a forecast, as the
  design (section 1) says. Skipping the sun's share cost 0.31 EUR on real
  2026 prices (29.72 against P3's 29.41) and saved nothing on the P3 set.
- A forecast reading from before local midnight is stale: until the
  integration refreshes, "left today" is still yesterday's 0 and
  "tomorrow" is really today.
- Forecast entity ids must be sensor.[a-z0-9_]+ (they go into the
  /api/states/<id> path).
- House profile: a stored day that is not a date, or is after today, is
  dropped instead of kept forever.
- Text: the forecast line says "for the rest of today"; the learning line
  no longer promises "tomorrow" (a plan needs one full day).
- Tests for four surviving review mutants (hour sample floor, the dear run
  after the cheap run, share by room, daytime use) and the fixes above.
- Replay tool: `--fc zero` (a forecast of no sun).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

goodwe_controller/DOCS.md

@@ -545,7 +545,7 @@ With battery modes on, these choices replace the *Charging and selling on price*
 - *Solar first* never charges from the grid.
 - The house use is the add-on's own measurement (grid + battery power) per hour, over the last 7 days. It needs one day of it before the first plan.
 - The plan is checked every 15 minutes. A planned level moves only by 1 kWh or 10 %, so a wobbling forecast does not flip it.
-- No forecast, one older than 3 hours, or no house use yet: *Leftover solar* takes solar only and *Cheap hours only* fills to the top level. The Batteries screen says so.
+- No forecast, one older than 3 hours or from before midnight, or no house use yet: *Leftover solar* takes solar only and *Cheap hours only* fills to the top level. The Batteries screen says so.
 - A battery needs its capacity (`inverters.capacity_kwh`) for a plan.
 
 **What always comes first.**

goodwe_controller/app/dayplan.py

@@ -12,8 +12,10 @@ The sums (OPT-11-design section 1, "Excess solar", with the owner's answers):
   expensive run the cheap run is for, x the charge efficiency:
   `trust x sum_h max(0, forecast_h - house_h) x EFF`.
 * Solar first batteries take it first, up to the ceiling. What is left is
-  shared by the Leftover solar and Cheap hours batteries by their room.
+  shared by the Leftover solar batteries by their room.
-* A Cheap hours battery charges from the grid up to `ceiling - its share`.
+* Cheap hours only ignores the plan and fills to the ceiling, as in P3 and
+  the design (section 1). Skipping the sun's share cost money in the replay
+  (PR #156 review: 29.72 against 29.41 EUR on real 2026 prices).
 * A Leftover solar battery charges only up to what the house will draw from
   it in the expensive runs before the next cheap run, less its share:
   `min(ceiling, floor + house use / EFF) - share`. So it buys only the
@@ -32,7 +34,7 @@ import statistics
 from dataclasses import dataclass
 from datetime import datetime, timedelta, timezone
 
-from .packmode import CHEAP_HOURS, LEFTOVER_SOLAR, SOLAR_FIRST
+from .packmode import LEFTOVER_SOLAR, SOLAR_FIRST
 from .tariff import BILLING_TZ
 
 EFF = 0.95                  # charge (and discharge) efficiency
@@ -67,6 +69,10 @@ class HouseProfile:
 
     def load(self, data):
         for day, hours in data.items():
+            try:
+                datetime.strptime(str(day), "%Y-%m-%d")
+            except ValueError:
+                continue
             if not isinstance(hours, dict):
                 continue
             row = {}
@@ -105,8 +111,11 @@ class HouseProfile:
         return closed
 
     def _prune(self, lt):
+        """Keep the last `PROFILE_DAYS` days; a day after today (the clock
+        was wrong once) would never age out, so it goes too."""
         keep = (lt.date() - timedelta(days=PROFILE_DAYS)).isoformat()
-        for d in [d for d in self.days if d < keep]:
+        today = lt.date().isoformat()
+        for d in [d for d in self.days if d < keep or d > today]:
             del self.days[d]
 
     def ready(self) -> bool:
@@ -142,7 +151,7 @@ class Plan:
     sun_kwh: float              # solar the batteries can count on
     fc_kwh: float               # the forecast over the same span
     until: datetime             # the expensive run the plan is for
-    targets: dict               # name -> level % (LS and CH only)
+    targets: dict               # name -> level % (Leftover solar only)
     need_kwh: dict              # name -> kWh from the grid (0: none)
     share_kwh: dict             # name -> kWh of solar counted for it
 
@@ -195,7 +204,7 @@ def plan(forecast, house, runs, now, packs, *, trust_pct, floor_pct,
     usable = [p for p in packs if p.use and p.live and p.idle
               and p.soc is not None and p.capacity_kwh]
     sf = [p for p in usable if p.mode == SOLAR_FIRST]
-    price = [p for p in usable if p.mode in (LEFTOVER_SOLAR, CHEAP_HOURS)]
+    price = [p for p in usable if p.mode == LEFTOVER_SOLAR]
     sf_room = sum(_room(p, ceiling_pct) for p in sf)
     excess = max(0.0, sun - sf_room)
     rooms = {p.name: _room(p, ceiling_pct) for p in price}
@@ -218,12 +227,9 @@ def plan(forecast, house, runs, now, packs, *, trust_pct, floor_pct,
     for p in price:
         sh = excess * rooms[p.name] / total_room if total_room > 0 else 0.0
         sh_pct = sh / caps[p.name] * 100.0
-        if p.mode == CHEAP_HOURS:
+        want = use_kwh * caps[p.name] / cap_sum / EFF
-            top = float(ceiling_pct)
+        top = min(float(ceiling_pct),
-        else:
+                  float(floor_pct) + want / caps[p.name] * 100.0)
-            want = use_kwh * caps[p.name] / cap_sum / EFF
-            top = min(float(ceiling_pct),
-                      float(floor_pct) + want / caps[p.name] * 100.0)
         level = max(0.0, top - sh_pct)
         targets[p.name] = round(level, 2)
         need[p.name] = round(_room(p, level), 3)

goodwe_controller/app/modetrade.py

@@ -24,10 +24,10 @@ Roles (the page's Why line names them):
 Rules that keep this safe (tests: test_modes_p3.py):
   * every range holds 0 W (a mode may forbid a direction, never force one);
   * a Solar first battery never charges from the grid;
-  * P4: with a day plan (`targets`), a Leftover solar or Cheap hours battery
+  * P4: with a day plan (`targets`), a Leftover solar battery charges from
-    charges from the grid only up to its planned level, never above the
+    the grid only up to its planned level, never above the ceiling; with
-    ceiling; with none, Cheap hours fills to the ceiling and Leftover solar
+    none it takes solar only (P3 option A). Cheap hours only fills to the
-    takes solar only (P3 option A, `charge_to()`);
+    ceiling either way (`charge_to()`);
   * grid charging needs a measured peak guard that is clear and a measured
     headroom (SAFETY-45); the trade is sized to that headroom, whose aim is
     `peak_cap_w - peak_margin_w` (SAFETY-79). It starts only at START_W or
@@ -98,12 +98,13 @@ def charge_to(p: Pack, ceiling_pct, targets=None):
     `targets` is the day plan (`dayplan.plan()`: name -> level), or None
     when there is none (no forecast, stale, or not configured). With no plan
     this is P3 option A exactly: Cheap hours to the ceiling, the others never.
-    With a plan, a Leftover solar or Cheap hours battery charges only to its
+    With a plan, a Leftover solar battery charges only to its planned level
-    planned level (the sun fills the rest), and a battery the plan leaves out
+    (the sun fills the rest); a battery the plan leaves out, Cheap hours only
-    falls back to the no-plan answer. Solar first never charges."""
+    included, gets the no-plan answer. Solar first never charges."""
-    if targets is None or p.name not in targets:
+    if p.mode in GRID_CHARGE_MODES:
-        return float(ceiling_pct) if p.mode in GRID_CHARGE_MODES else None
+        return float(ceiling_pct)
-    if p.mode not in PLAN_CHARGE_MODES:
+    if targets is None or p.name not in targets \
+            or p.mode not in PLAN_CHARGE_MODES:
         return None
     t = targets[p.name]
     return None if t is None else min(float(ceiling_pct), float(t))

goodwe_controller/app/packmode.py

@@ -49,10 +49,10 @@ SELLING_ENABLED = False
 # The modes that may charge from the grid in a cheap run with no day plan.
 # Leftover solar takes solar only then (owner decision 2026-09-29, option A).
 GRID_CHARGE_MODES = (CHEAP_HOURS,)
-# OPT-11 P4: with a fresh solar forecast, the day plan (dayplan.py) may also
+# OPT-11 P4: with a fresh solar forecast, the day plan (dayplan.py) lets
-# let Leftover solar charge from the grid, by the shortfall only. Solar first
+# Leftover solar charge from the grid, by the shortfall only. Cheap hours only
-# never charges from the grid.
+# ignores the plan (fills to the ceiling); Solar first never grid-charges.
-PLAN_CHARGE_MODES = (LEFTOVER_SOLAR, CHEAP_HOURS)
+PLAN_CHARGE_MODES = (LEFTOVER_SOLAR,)
 
 
 def enabled(opts) -> bool:

goodwe_controller/app/solarfc.py

@@ -24,8 +24,9 @@ state only. The unit is read, never guessed (the rule `pv.watts()` has).
 Without an hourly split, the day's energy is spread over a fixed bell from
 06:00 to 20:00 local time (`BELL_FROM_H`, `BELL_TO_H`).
 
-A reading older than `FRESH_S` is stale, and a stale or missing forecast is
+A reading older than `FRESH_S`, or from before local midnight, is stale,
-no forecast: the day plan is off and every mode acts as in P3 option A.
+and a stale or missing forecast is no forecast: the day plan is off and
+every mode acts as in P3 option A.
 """
 
 import math
@@ -238,14 +239,16 @@ def read(today_state, tomorrow_state, now: datetime, *,
     if today is None:
         return None, why
     at = _reported(today_state)
-    if at is None or (now - at).total_seconds() > FRESH_S \
+    # A reading from before local midnight is yesterday's "left today" (0
+    # after sunset) until the integration refreshes: stale, not a dark day.
+    if at is None or at < day0 or (now - at).total_seconds() > FRESH_S \
             or (at - now).total_seconds() > 300:
         return None, STALE
     tomorrow = None
     if tomorrow_state is not None:
         t, _w = _day(tomorrow_state, day1, now, today=False)
         t_at = _reported(tomorrow_state)
-        if t is not None and t_at is not None \
+        if t is not None and t_at is not None and t_at >= day0 \
                 and (now - t_at).total_seconds() <= FRESH_S:
             tomorrow = t
     return Forecast(today, tomorrow, at), None

goodwe_controller/app/ui_text/en.json

@@ -339,7 +339,7 @@
       "tops_up": "Too little sun is forecast, so it charges some from the grid.",
       "no_forecast": "No solar forecast, so it charges from solar only."
     },
-    "solar": {"line": "Solar forecast today: {kwh}, we count on {count}. Updated {at}.", "no_forecast": "No solar forecast now, so Leftover solar charges from solar only.", "learning": "The add-on is learning your house's use. The plan starts tomorrow."},
+    "solar": {"line": "Solar forecast for the rest of today: {kwh}, we count on {count}. Updated {at}.", "no_forecast": "No solar forecast now, so Leftover solar charges from solar only.", "learning": "The add-on is learning your house's use. The plan starts after one full day."},
     "today": {
       "not_planned": "Not planned yet.",
       "no_runs": "No cheap or expensive hours left today.",

goodwe_controller/app/ui_text/nl.json

@@ -281,7 +281,7 @@
       "tops_up": "Te weinig zon voorspeld, dus ze laadt wat van het net.",
       "no_forecast": "Geen zonneprognose, dus ze laadt alleen met zonne-energie."
     },
-    "solar": {"line": "Zonneprognose vandaag: {kwh}, we rekenen op {count}. Bijgewerkt om {at}.", "no_forecast": "Nu geen zonneprognose, dus Overschot zonne-energie laadt alleen met zon.", "learning": "De add-on leert eerst het verbruik van uw huis. Het plan start morgen."},
+    "solar": {"line": "Zonneprognose voor de rest van vandaag: {kwh}, we rekenen op {count}. Bijgewerkt om {at}.", "no_forecast": "Nu geen zonneprognose, dus Overschot zonne-energie laadt alleen met zon.", "learning": "De add-on leert eerst het verbruik van uw huis. Het plan start na één volle dag."},
     "today": {
       "not_planned": "Nog niet gepland.",
       "no_runs": "Vandaag geen goedkope of dure uren meer.",

goodwe_controller/app/validate.py

@@ -328,6 +328,7 @@ WHAT IS DELIBERATELY *NOT* REFUSED, because it is untidy rather than unsafe:
 """
 
 import logging
+import re
 from typing import NamedTuple
 
 from . import dayplan, messages, pv, solarfc
@@ -2066,6 +2067,8 @@ def _margin_problems(opts: dict) -> list[str]:
 
 
 TRUST_RANGE_PCT = (30, 100)
+# A Home Assistant sensor id; it goes into the /api/states/<id> path.
+_SENSOR_ID = re.compile(r"sensor\.[a-z0-9_]+")
 FORECAST_KEYS = ("pv_forecast_entity", "pv_forecast_tomorrow_entity")
 
 
@@ -2083,7 +2086,7 @@ def _forecast_problems(opts: dict) -> list[str]:
         e = opts.get(key)
         if e is None or e == "":
             continue
-        if not isinstance(e, str) or not e.strip().startswith("sensor."):
+        if not isinstance(e, str) or not _SENSOR_ID.fullmatch(e):
             out.append(f"{S(key)} must be a sensor, like "
                        f"sensor.energy_production_today_remaining. It is "
                        f"{messages.shown(e)}.")

goodwe_controller/test_modes_p4.py

@@ -116,15 +116,15 @@ check("the harness bites: Leftover solar grid-charging with no plan moves "
 _read = solarfc.read
 
 
-def _as_sunny(today, tomorrow, now, **kw):
+def _as_dark(today, tomorrow, now, **kw):
-    return _read({"state": "200", "attributes": {"unit_of_measurement":
+    return _read({"state": "0", "attributes": {"unit_of_measurement":
-                                                 "kWh"},
+                                               "kWh"},
                   "last_updated": now.isoformat()}, None, now)
 
 
-check("...and an unavailable forecast read as a sunny one moves "
+check("...and an unavailable forecast read as a dark one moves "
-      "n2_sf_ch_fc_down (Cheap hours would skip its charge)",
+      "n2_sf_ls_fc_down (Leftover solar would buy its shortfall)",
-      _moved("n2_sf_ch_fc_down", lambda: setattr(solarfc, "read", _as_sunny),
+      _moved("n2_sf_ls_fc_down", lambda: setattr(solarfc, "read", _as_dark),
              lambda: setattr(solarfc, "read", _read)))
 
 # ============================================================================ #
@@ -204,6 +204,18 @@ check("with it, tomorrow's sun is counted",
 fcs, _ = solarfc.read(st("12.5"), st("20.0", at=old), NOW)
 check("a stale tomorrow is dropped, today is kept",
       fcs is not None and fcs.tomorrow is None)
+# Review (PR #156): just after local midnight the integration may not have
+# refreshed yet, so "left today" is still yesterday's 0 and "tomorrow" is
+# really today. That is stale, not a dark day.
+MID = datetime(2026, 9, 22, 0, 10, tzinfo=L).astimezone(timezone.utc)
+EVE = datetime(2026, 9, 21, 21, 30, tzinfo=L).astimezone(timezone.utc)
+check("a today reading from before local midnight is stale (not 0 kWh)",
+      solarfc.read(st("0.0", at=EVE), st("15", at=EVE), MID)
+      == (None, solarfc.STALE))
+fcm, _ = solarfc.read(st("15", at=MID - timedelta(minutes=2)),
+                      st("18", at=EVE), MID)
+check("...and a tomorrow reading from before midnight is dropped",
+      fcm is not None and fcm.tomorrow is None)
 
 # ============================================================================ #
 print("3. the house profile")
@@ -241,6 +253,14 @@ check("only the last 7 days are kept", len(hp9.days) <= 8)
 hp_rt = dayplan.HouseProfile(hp.dump())
 check("dump and load give the same figures", hp_rt.hour_w(18) == round(
     hp.hour_w(18), 1) and hp_rt.ready())
+bogus = dayplan.HouseProfile({"2099-01-01": {str(h): 9e5 for h in range(24)},
+                              "zz": {str(h): 9e5 for h in range(24)}})
+check("a stored day that is not a date is dropped on load",
+      "zz" not in bogus.days)
+bogus.add(UTC0, 500.0)
+bogus.add(UTC0 + timedelta(hours=1), 500.0)
+check("a stored day after today (a wrong clock) is pruned, not kept forever",
+      "2099-01-01" not in bogus.days)
 check("a bad stored profile is ignored, not fatal",
       not dayplan.HouseProfile({"x": "y", "2026-09-20": {"99": 1,
                                                           "a": "b"}}).ready())
@@ -316,11 +336,38 @@ ch = dplan(12.0, packs=[pk(A, packmode.SOLAR_FIRST, 60.0),
                         pk(B, packmode.CHEAP_HOURS, 30.0)])
 ch_dark = dplan(1.0, packs=[pk(A, packmode.SOLAR_FIRST, 60.0),
                             pk(B, packmode.CHEAP_HOURS, 30.0)])
-check("Cheap hours: dark fills to the ceiling (as P3)",
+check("...and on a partly sunny day too: Cheap hours ignores the plan "
-      abs(ch_dark.targets[B] - 95.0) < 1e-6)
+      "(design section 1; review of PR #156)", B not in ch.targets
-check("...and skips the part the sun covers on a partly sunny day",
+      and B not in ch_dark.targets
-      ch.targets[B] < 95.0 and ch.share_kwh[B] > 0
+      and modetrade.charge_to(pk(B, packmode.CHEAP_HOURS, 30.0), 95.0,
-      and abs(ch.targets[B] - (95.0 - ch.share_kwh[B] * 10.0)) < 0.01)
+                              {B: 40.0}) == 95.0)
+# Review of PR #156: four mutants that survived.
+_hi = {h: (3000.0 if 17 <= h < 22 else 2000.0 if 8 <= h < 17 else 600.0)
+       for h in range(24)}
+check("a house that uses more by day leaves less sun: a higher level",
+      dplan(20.0, est=(lambda h: _hi[h], 600.0)).targets[B]
+      > dplan(20.0).targets[B] + 1.0)
+_two = dplan(40.0, packs=[pk(A, packmode.SOLAR_FIRST, 60.0),
+                          pk(B, packmode.LEFTOVER_SOLAR, 30.0),
+                          pk("inverter-c", packmode.LEFTOVER_SOLAR, 80.0)])
+check("two Leftover solar batteries share the sun by their room (65:15)",
+      abs(_two.share_kwh[B] / _two.share_kwh["inverter-c"] - 6.5 / 1.5)
+      < 0.01)
+_h = lambda hh: datetime(2026, 9, 21, hh, tzinfo=L).astimezone(timezone.utc)
+_rp = priceruns.RunPlan(priceruns.Run(_h(13), _h(14), 0.02),
+                        (priceruns.Run(_h(8), _h(9), 0.4),
+                         priceruns.Run(_h(19), _h(20), 0.4)),
+                        None, 0.3, None, True)
+_pl = dayplan.plan(fc_of(12.0), EST, _rp, T0, PACKS, trust_pct=70,
+                   floor_pct=20.0, ceiling_pct=95.0)
+check("the plan is for the dear run after the cheap run, not an earlier one",
+      _pl is not None and _pl.until == _h(19))
+_hp = dayplan.HouseProfile()
+for i in range(30):
+    _hp.add(_h(10) + timedelta(seconds=5 * i), 500.0)
+_hp.add(_h(11), 500.0)
+check("an hour with under 5 minutes of readings is not kept",
+      not any(10 in r for r in _hp.days.values()))
 check("trust 100 % counts more sun than 70 %: a lower level",
       dplan(12.0, trust=100).targets[B] < partly.targets[B])
 check("...and the sun counted scales with the trust exactly",
@@ -437,7 +484,8 @@ for i in range(5000):
             bad.append(("range without 0", p, lo, hi))
         if t.roles[p.name] == modetrade.CHARGE and (
                 p.mode == packmode.SOLAR_FIRST
-                or p.soc >= min(95.0, targets[p.name])):
+                or p.soc >= (95.0 if p.mode == packmode.CHEAP_HOURS
+                             else min(95.0, targets[p.name]))):
             bad.append(("charges past its level", p, targets))
 check(f"decide() with a plan on 5000 random cases: ranges hold 0, nothing "
       f"charges at or past its level, Solar first never ({len(bad)} bad)",
@@ -567,17 +615,17 @@ check("dark: ...only up to its level (the shortfall), not 95 %",
 check("dark: A rests while B charges", all(r["roles"][A] == modetrade.REST
                                            for r in charge))
 
-# Cheap hours on a partly sunny day: skips the part the sun covers.
+# Cheap hours on a partly sunny day: ignores the plan, fills as in P3.
 rows, st_, c = run_day(SF_CH, fc=14.0, soc0={"a": 60.0, "b": 30.0})
 charge = invariants("cheap hours, partly", rows, c)
-tgt = nth([r["targets"][B] for r in rows if r["targets"]], 0, "a level")
 top = max(r["soc"]["b"] for r in rows)
-print(f"    cheap hours partly: B level {tgt:.1f} %, reached {top:.1f} %")
+print(f"    cheap hours partly: B reached {top:.1f} %")
-check("Cheap hours with sun forecast: charges, but stops below 95 %",
+check("Cheap hours gets no planned level",
-      charge and present(tgt) and tgt < 90.0 and top <= tgt + 2.0)
+      not any(r["targets"] and B in r["targets"] for r in rows))
 rows_nf, _s, c_nf = run_day(SF_CH, fc=None, soc0={"a": 60.0, "b": 30.0})
-check("...and with the forecast down it fills towards 95 % as in P3",
+check("Cheap hours with a sun forecast charges as with none (P3)",
-      max(r["soc"]["b"] for r in rows_nf) > top + 10.0)
+      charge and abs(max(r["soc"]["b"] for r in rows_nf) - top) < 1.0
+      and top > 80.0)
 
 # The forecast goes away mid-run: Leftover solar stops at once (P3 option A).
 DROP = UTC0 + timedelta(hours=1, minutes=30)
@@ -660,8 +708,8 @@ rows, st_, c = run_day(SF_LS, fc=1.0, soc0={"a": 60.0, "b": 30.0},
 rp.m.datetime = datetime
 sb = homeview.solar_block(c, c.solar_fc.at)
 check("the forecast line names the forecast, what is counted and when",
-      sb["line"].startswith("Solar forecast today:") and "we count on" in
+      sb["line"].startswith("Solar forecast for the rest of today:")
-      sb["line"] and sb["state"] == "plan")
+      and "we count on" in sb["line"] and sb["state"] == "plan")
 why = homeview.day_key(c, B)
 check("B's Why key (plan, dark) is tops_up", why == "tops_up")
 check("...and says so in plain words", homeview.why_words(why)
@@ -723,6 +771,12 @@ check("a forecast entity that is not a sensor is refused, in plain words",
       validate._forecast_problems({"pv_forecast_entity": "number.x"})
       and "must be a sensor" in validate._forecast_problems(
           {"pv_forecast_entity": "number.x"})[0])
+check("an entity id with a path or odd characters is refused",
+      all(validate._forecast_problems({"pv_forecast_entity": e}) for e in
+          ("sensor.x/../config", "sensor.x?y=1", "sensor.X", "sensor.",
+           " sensor.x", "sensor.a b"))
+      and not validate._forecast_problems(
+          {"pv_forecast_entity": "sensor.energy_production_today_remaining"}))
 check("empty entities are fine", not validate._forecast_problems(
     {"pv_forecast_entity": "", "pv_forecast_tomorrow_entity": ""}))
 notes = []

goodwe_controller/tools/opt11p4_replay.py

@@ -20,6 +20,8 @@ days; the 2026-09-24 PV recording is only in the live Home Assistant):
 * `national`: the Belgian day-ahead forecast itself, scaled to the site
   (one factor: the site's total over the national total, all days). It
   carries local weather differences too, so it is the harder test.
+* `zero`: a forecast of no sun at all (is the gain the forecast's, or only
+  Leftover solar buying the evening's shortfall?).
 * `high`: `national` x 1.5. `missing`: the sensor is configured but reads
   `unavailable`. The sensor has Open-Meteo's shape (state = kWh left today,
   `wh_period` = Wh per hour); `--shape state` drops `wh_period`
@@ -98,6 +100,8 @@ def forecast_table(kind, house, days):
     day_of = {h: datetime.fromtimestamp(h, LOCAL).date() for h in pv}
     if kind in ("perfect", "missing"):
         out = dict(pv)
+    elif kind == "zero":
+        out = {h: 0.0 for h in pv}
     elif kind == "recorded":
         ratio = {}
         for d in set(day_of.values()):
@@ -176,7 +180,7 @@ def main():
     ap.add_argument("--variant", default="p4_ls")
     ap.add_argument("--fc", default="recorded",
                     choices=("none", "recorded", "national", "perfect",
-                             "high", "missing"))
+                             "high", "missing", "zero"))
     ap.add_argument("--prices", default="epex2025",
                     choices=("epex2025", "real2026"))
     ap.add_argument("--shape", default="periods",