OPT-11 P4 review: records and text

- DECISIONS: the Cheap hours change and why; the no-sun replay (the gain is
  Leftover solar buying the evening's shortfall; the forecast added 0.14
  EUR); the reconstruction bias stated plainly.
- DOCS: Cheap hours ignores the forecast; a reading from before midnight
  is stale.
- The forecast line: "Solar still to come today: ..." (it is what is
  left, and it stays within the 12-word limit).

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

goodwe_controller/DECISIONS/OPT-11-battery-modes.md

@@ -94,7 +94,8 @@ P1 is its section 6 P1, and the pull request lists what was measured.
   - Leftover solar may then charge from the grid up to min(ceiling, floor +
     the house's use in the expensive runs / 0.95), less its sun share: only
     the shortfall.
-  - Cheap hours only charges up to the ceiling less its sun share.
+  - Cheap hours only ignores the plan and fills to the ceiling (design
+    section 1; review of #156, see the replay below).
   - Solar first never charges from the grid (owner, 2026-09-29).
 - The level is kept unless it moves by min(1 kWh, 10 %). With no plan
   (no, stale or failed forecast, no house profile, no capacity) every mode
@@ -114,9 +115,15 @@ P1 is its section 6 P1, and the pull request lists what was measured.
   - the days' real 2026 quarter-hourly prices (held out): P2 32.26, option A
     32.01, old trade 31.40, P4 29.19 (perfect 29.21, too high 29.28, missing
     32.01).
-  - Solar first + Cheap hours only: 19.57 on both P3 and P4 (year-earlier
-    prices); on real 2026 prices P4 29.72 against P3's 29.41. Skipping the
-    sun's share does not pay for Cheap hours there; Leftover solar is the
-    mode the forecast pays for.
+  - Solar first + Cheap hours only, skipping its sun share (the first
+    build): 19.57 (same as P3) and 29.72 against P3's 29.41. The shorter,
+    moved runs left B lower, so later midday top-ups rested A while the sun
+    shone. Cheap hours now ignores the plan, which is P3 exactly.
+  - A forecast of no sun at all gives 19.14 and 29.33. So nearly all of the
+    gain is Leftover solar buying the evening's shortfall in the cheap run;
+    the forecast itself was worth 0.14 EUR in 16 September days.
+  - Bias: the site's solar is rebuilt from the same net use the replay
+    plays, and "recorded" keeps its hourly shape and adds only the national
+    daily error. Both favour P4; "national" (no house leakage) gives 29.25.
   No threshold was tuned to these days. The 2026-09-24 PV recording could not
   be replayed: it is only in the live Home Assistant.

goodwe_controller/DOCS.md

@@ -541,7 +541,7 @@ With battery modes on, these choices replace the *Charging and selling on price*
 **Solar forecast** (`pv_forecast_entity`, optional). A Home Assistant sensor with the solar energy still to come today, in kWh. These work: Forecast.Solar (`sensor.energy_production_today_remaining`), Solcast PV Forecast (`sensor.solcast_pv_forecast_forecast_remaining_today`) and Open-Meteo Solar Forecast (`sensor.energy_production_today_remaining`). Set `pv_forecast_tomorrow_entity` to the matching *tomorrow* sensor to plan a cheap run before midnight.
 - Before each cheap run the add-on asks: will the sun fill the batteries before the expensive hours? It counts on `solar_trust_pct` of the forecast (70 %), less what the house uses. Solar first batteries get that sun first.
 - *Leftover solar* then charges from the grid only the shortfall: what the house will draw from it in the expensive hours, less its share of the sun. Not up to the top level.
-- *Cheap hours only* fills to the top level less its share of the sun.
+- *Cheap hours only* ignores the forecast and fills to the top level.
 - *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.

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 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."},
+    "solar": {"line": "Solar still to come 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 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."},
+    "solar": {"line": "Nog verwachte zon 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/test_modes_p4.py

@@ -708,7 +708,7 @@ 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 for the rest of today:")
+      sb["line"].startswith("Solar still to come today:")
       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")