diff --git a/backend/app/routers/plan.py b/backend/app/routers/plan.py
index 8e7dca6..21ada76 100644
--- a/backend/app/routers/plan.py
+++ b/backend/app/routers/plan.py
@@ -86,14 +86,6 @@ def _bundle_from_debug(payload: dict[str, Any]) -> PlanningBundleDto:
     return _bundle_from_payload(payload, run_key="planning_run")
 
 
-def _extract_run_id(bundle: PlanningBundleDto) -> int | None:
-    raw = bundle.run.get("id")
-    try:
-        return int(raw)
-    except (TypeError, ValueError):
-        return None
-
-
 def _build_plan_diff(
     active: PlanningBundleDto,
     comparison: PlanningBundleDto,
@@ -194,59 +186,27 @@ async def get_plan_compare(
         if not site_ok:
             raise HTTPException(status_code=404, detail="Site not found")
 
-        active_raw = await fetch_json(
+        payload = await fetch_json(
             conn,
-            "select ems.fn_plan_current_bundle($1::int)",
+            "select ems.fn_plan_compare_bundle($1::int)",
             site_id,
         )
-        if not isinstance(active_raw, dict):
-            active_raw = json.loads(active_raw)
-        if active_raw.get("error") == "no_active_plan":
-            raise HTTPException(status_code=404, detail="No active plan")
-
-        active = _bundle_from_current(active_raw)
-        active_run_id = _extract_run_id(active)
-        if active_run_id is None:
-            raise HTTPException(status_code=404, detail="No active plan")
-
-        compare_run_id = await conn.fetchval(
-            """
-            select pr.id
-            from ems.planning_run pr
-            where pr.site_id = $1::int
-              and pr.status = 'comparison'
-              and (pr.solver_params->>'comparison_of_run_id')::int = $2::int
-            order by pr.created_at desc
-            limit 1
-            """,
-            site_id,
-            active_run_id,
-        )
-        if compare_run_id is None:
-            compare_run_id = await conn.fetchval(
-                """
-                select pr.id
-                from ems.planning_run pr
-                where pr.site_id = $1::int
-                  and pr.status = 'comparison'
-                order by pr.created_at desc
-                limit 1
-                """,
-                site_id,
-            )
-        if compare_run_id is None:
-            raise HTTPException(status_code=404, detail="No comparison plan")
-        compare_raw = await fetch_json(
-            conn,
-            "select ems.fn_planning_run_debug($1::int)",
-            int(compare_run_id),
-        )
-    if not isinstance(compare_raw, dict):
-        compare_raw = json.loads(compare_raw)
-    if compare_raw is None:
+    if not isinstance(payload, dict):
+        payload = json.loads(payload)
+    err = payload.get("error")
+    if err == "no_active_plan":
+        raise HTTPException(status_code=404, detail="No active plan")
+    if err == "no_comparison_plan":
         raise HTTPException(status_code=404, detail="No comparison plan")
 
-    comparison = _bundle_from_debug(compare_raw)
+    active_raw = payload.get("active") or {}
+    compare_raw = payload.get("comparison")
+    if not isinstance(active_raw, dict):
+        active_raw = {}
+    if not isinstance(compare_raw, dict):
+        raise HTTPException(status_code=404, detail="No comparison plan")
+
+    active = _bundle_from_current(active_raw)
     diff, slot_diffs = _build_plan_diff(active, comparison)
     return PlanningCompareResponseModel(
         active=active,
diff --git a/backend/app/routers/site_configuration.py b/backend/app/routers/site_configuration.py
index 7b8d208..7f8f156 100644
--- a/backend/app/routers/site_configuration.py
+++ b/backend/app/routers/site_configuration.py
@@ -147,6 +147,10 @@ async def patch_pv_forecast_calibration(
                 status_code=404,
                 detail="PV forecast calibration row missing; run migration V057",
             )
+        await conn.execute(
+            "select ems.fn_refresh_site_pv_delta_profile_cache($1::int)",
+            site_id,
+        )
         row = await conn.fetchrow(
             """
             SELECT to_jsonb(c.*) AS j
diff --git a/db/migration/V079__pv_delta_profile_cache.sql b/db/migration/V079__pv_delta_profile_cache.sql
new file mode 100644
index 0000000..72428ff
--- /dev/null
+++ b/db/migration/V079__pv_delta_profile_cache.sql
@@ -0,0 +1,23 @@
+-- Cache výsledku fn_pv_forecast_delta_profile per site (obnovuje job fn_fill_forecast_accuracy).
+-- Zrychlení GET /plan/current a plánování (canonical PV forecast).
+
+alter table ems.site_pv_forecast_calibration
+  add column if not exists delta_profile_cache jsonb null,
+  add column if not exists delta_profile_cached_at timestamptz null;
+
+comment on column ems.site_pv_forecast_calibration.delta_profile_cache is
+  'Poslední JSON z fn_pv_forecast_delta_profile (120d lookback, now); NULL = ještě nepočítáno.';
+
+comment on column ems.site_pv_forecast_calibration.delta_profile_cached_at is
+  'Čas posledního refresh cache (fn_refresh_site_pv_delta_profile_cache).';
+
+create index if not exists idx_planning_run_site_comparison_of
+  on ems.planning_run (
+    site_id,
+    ((solver_params->>'comparison_of_run_id')::int),
+    created_at desc
+  )
+  where status = 'comparison';
+
+comment on index ems.idx_planning_run_site_comparison_of is
+  'Rychlé nalezení comparison runu pro GET /plan/compare (comparison_of_run_id v solver_params).';
diff --git a/db/routines/R__018_fn_pv_delta_profile_cache.sql b/db/routines/R__018_fn_pv_delta_profile_cache.sql
new file mode 100644
index 0000000..64cb11e
--- /dev/null
+++ b/db/routines/R__018_fn_pv_delta_profile_cache.sql
@@ -0,0 +1,90 @@
+-- Cache delta profilu PV (těžká agregace forecast_accuracy) — refresh po fn_fill_forecast_accuracy.
+-- Prefix R__018: musí běžet před R__022 (volá fn_refresh_site_pv_delta_profile_cache).
+
+create or replace function ems.fn_refresh_site_pv_delta_profile_cache(p_site_id int)
+returns void
+language plpgsql
+as $fn$
+declare
+  v_profile jsonb;
+begin
+  v_profile := ems.fn_pv_forecast_delta_profile(
+    p_site_id,
+    now() - interval '120 days',
+    now()
+  );
+
+  update ems.site_pv_forecast_calibration c
+  set
+    delta_profile_cache = v_profile,
+    delta_profile_cached_at = now(),
+    updated_at = now()
+  where c.site_id = p_site_id;
+
+  if not found then
+    insert into ems.site_pv_forecast_calibration (
+      site_id,
+      delta_learn_min_ts,
+      delta_profile_cache,
+      delta_profile_cached_at
+    )
+    values (
+      p_site_id,
+      timestamptz '2026-04-11T22:00:00Z',
+      v_profile,
+      now()
+    );
+  end if;
+end;
+$fn$;
+
+comment on function ems.fn_refresh_site_pv_delta_profile_cache(int) is
+  'Přepočte a uloží delta_profile_cache pro site (volá fn_pv_forecast_delta_profile).';
+
+create or replace function ems.fn_pv_forecast_delta_profile_cached(
+  p_site_id int,
+  p_data_from timestamptz default (now() - interval '120 days'),
+  p_data_to timestamptz default now(),
+  p_half_life_days numeric default 14,
+  p_threshold_w int default 150,
+  p_top_n_days int default 3,
+  p_non_top_day_factor numeric default 0.02,
+  p_day_weight_gamma numeric default 1.0,
+  p_max_age interval default interval '30 minutes'
+)
+returns jsonb
+language plpgsql
+stable
+as $fn$
+declare
+  v_cached jsonb;
+  v_cached_at timestamptz;
+begin
+  select c.delta_profile_cache, c.delta_profile_cached_at
+  into v_cached, v_cached_at
+  from ems.site_pv_forecast_calibration c
+  where c.site_id = p_site_id;
+
+  if v_cached is not null
+     and v_cached_at is not null
+     and v_cached_at >= now() - p_max_age
+     and p_data_from >= (now() - interval '120 days')
+     and p_data_to <= now() + interval '5 minutes' then
+    return v_cached;
+  end if;
+
+  return ems.fn_pv_forecast_delta_profile(
+    p_site_id,
+    p_data_from,
+    p_data_to,
+    p_half_life_days,
+    p_threshold_w,
+    p_top_n_days,
+    p_non_top_day_factor,
+    p_day_weight_gamma
+  );
+end;
+$fn$;
+
+comment on function ems.fn_pv_forecast_delta_profile_cached is
+  'Delta profil z cache (max 30 min) nebo přepočet; pro canonical PV a /plan/current.';
diff --git a/db/routines/R__022_fn_fill_forecast_accuracy.sql b/db/routines/R__022_fn_fill_forecast_accuracy.sql
index b2d673b..4700a2a 100644
--- a/db/routines/R__022_fn_fill_forecast_accuracy.sql
+++ b/db/routines/R__022_fn_fill_forecast_accuracy.sql
@@ -185,6 +185,9 @@ BEGIN
         learning_exclude_reason   = EXCLUDED.learning_exclude_reason;
 
     GET DIAGNOSTICS v_count = ROW_COUNT;
+
+    perform ems.fn_refresh_site_pv_delta_profile_cache(p_site_id);
+
     RETURN v_count;
 END;
 $$;
@@ -194,6 +197,7 @@ COMMENT ON FUNCTION ems.fn_fill_forecast_accuracy(INT, INT) IS
 learning_eligible / learning_exclude_reason: před delta_learn_min_ts (kalibrace site) se nepočítá do učení delty;
 po pv_curtailment_policy_effective_from sloty s curtailment / gen cutoff / cutoff_switch_log (export off) mají NULL actual a jsou vyloučeny z učení;
 telemetrie: is_export_limited nebo pv_derating_flags <> 0 v okně slotu → stejné vyloučení (telemetry_derating).
+Po úspěšném INSERT volá fn_refresh_site_pv_delta_profile_cache (V079 cache pro /plan/current).
 Volat každých 15 minut (spolu s audit_filler) pro inkrementální plnění.
 p_lookback_hours: kolik hodin zpět zpracovat (default 48h pro catch-up).
 Pro první backfill: SELECT ems.fn_fill_forecast_accuracy(2, 8760) -- 1 rok';
diff --git a/db/routines/R__033_fn_plan_current_bundle.sql b/db/routines/R__033_fn_plan_current_bundle.sql
index d3ab283..7a157aa 100644
--- a/db/routines/R__033_fn_plan_current_bundle.sql
+++ b/db/routines/R__033_fn_plan_current_bundle.sql
@@ -17,6 +17,12 @@ declare
   v_cap numeric;
   v_cov numeric;
   v_scarcity numeric;
+  v_horizon_start timestamptz;
+  v_horizon_end timestamptz;
+  v_chart_end timestamptz;
+  v_fc_from timestamptz;
+  v_fc_to timestamptz;
+  v_fc_slots jsonb;
 begin
   select to_jsonb(pr)
   into v_run
@@ -31,6 +37,23 @@ begin
   end if;
 
   v_run_id := (v_run->>'id')::int;
+  v_horizon_start := (v_run->>'horizon_start')::timestamptz;
+  v_horizon_end := (v_run->>'horizon_end')::timestamptz;
+  v_chart_end := greatest(v_horizon_end, v_horizon_start + interval '96 hours');
+
+  -- Kanonický PV forecast jen za horizontem uloženého plánu (graf až 96 h).
+  if v_horizon_end < v_chart_end then
+    v_fc_from := v_horizon_end;
+    v_fc_to := v_chart_end;
+    v_fc_slots := ems.fn_forecast_pv_slots_range_canonical_ab(
+      p_site_id,
+      v_fc_from,
+      v_fc_to,
+      now()
+    );
+  else
+    v_fc_slots := '[]'::jsonb;
+  end if;
 
   select coalesce(sum(ab.usable_capacity_wh), 0)::float
   into v_batt_wh
@@ -38,21 +61,12 @@ begin
   where ab.site_id = p_site_id;
 
   with fc_slot as (
-    -- Kanonický PV forecast pro UI = to, co solver používá (planning_interval.*_forecast_solver_w),
-    -- aby seděla bilance v tabulce slotů. Pro sloty mimo uložený plán doplníme forecast-only řádky.
     select
       c.interval_start,
       (coalesce(c.pv_a_forecast_canonical_w, 0) + coalesce(c.pv_b_forecast_canonical_w, 0))::bigint as pv_forecast_total_w,
       coalesce(c.pv_a_forecast_canonical_w, 0)::bigint as pv_a_forecast_solver_w,
       coalesce(c.pv_b_forecast_canonical_w, 0)::bigint as pv_b_forecast_solver_w
-    from jsonb_to_recordset(
-      ems.fn_forecast_pv_slots_range_canonical_ab(
-        p_site_id,
-        (v_run->>'horizon_start')::timestamptz,
-        greatest((v_run->>'horizon_end')::timestamptz, (v_run->>'horizon_start')::timestamptz + interval '96 hours'),
-        now()
-      )
-    ) as c(
+    from jsonb_to_recordset(v_fc_slots) as c(
       interval_start timestamptz,
       pv_a_forecast_canonical_w bigint,
       pv_b_forecast_canonical_w bigint
@@ -60,14 +74,30 @@ begin
   ),
   joined as (
     select
-      to_jsonb(pi.*)
-      || jsonb_build_object(
+      jsonb_build_object(
+        'interval_start', pi.interval_start,
+        'battery_setpoint_w', pi.battery_setpoint_w,
+        'battery_soc_target_pct', pi.battery_soc_target_pct,
+        'grid_setpoint_w', pi.grid_setpoint_w,
+        'export_limit_w', pi.export_limit_w,
+        'export_mode', pi.export_mode,
+        'deye_physical_mode', pi.deye_physical_mode,
+        'deye_gen_cutoff_enabled', pi.deye_gen_cutoff_enabled,
+        'ev1_setpoint_w', pi.ev1_setpoint_w,
+        'ev2_setpoint_w', pi.ev2_setpoint_w,
+        'heat_pump_enabled', pi.heat_pump_enabled,
+        'pv_a_curtailed_w', pi.pv_a_curtailed_w,
+        'expected_cost_czk', pi.expected_cost_czk,
+        'effective_buy_price', pi.effective_buy_price,
+        'effective_sell_price', pi.effective_sell_price,
+        'is_predicted_price', coalesce(pi.is_predicted_price, false),
         'pv_power_w', ai.actual_pv_power_w,
         'pv_forecast_total_w',
           coalesce(pi.pv_a_forecast_solver_w, 0)
           + coalesce(pi.pv_b_forecast_solver_w, 0),
         'pv_a_forecast_solver_w', pi.pv_a_forecast_solver_w,
-        'pv_b_forecast_solver_w', pi.pv_b_forecast_solver_w
+        'pv_b_forecast_solver_w', pi.pv_b_forecast_solver_w,
+        'load_baseline_w', pi.load_baseline_w
       ) as j,
       pi.interval_start,
       pi.expected_cost_czk,
@@ -90,6 +120,7 @@ begin
         'export_limit_w', null,
         'export_mode', null,
         'deye_physical_mode', null,
+        'deye_gen_cutoff_enabled', null,
         'ev1_setpoint_w', null,
         'ev2_setpoint_w', null,
         'heat_pump_enabled', null,
@@ -111,8 +142,8 @@ begin
       null::int as grid_setpoint_w,
       fs.pv_forecast_total_w
     from fc_slot fs
-    where fs.interval_start >= (v_run->>'horizon_start')::timestamptz
-      and fs.interval_start < greatest((v_run->>'horizon_end')::timestamptz, (v_run->>'horizon_start')::timestamptz + interval '96 hours')
+    where fs.interval_start >= v_horizon_start
+      and fs.interval_start < v_chart_end
       and not exists (
         select 1
         from ems.planning_interval pi2
@@ -218,4 +249,4 @@ end;
 $fn$;
 
 comment on function ems.fn_plan_current_bundle(int) is
-  'Aktivní planning_run + intervaly + souhrn (GET /plan/current).';
+  'Aktivní planning_run + intervaly + souhrn (GET /plan/current). PV za horizont plánu z canonical forecast; delta profil z cache.';
diff --git a/db/routines/R__088_fn_forecast_pv_slots_range_canonical_ab.sql b/db/routines/R__088_fn_forecast_pv_slots_range_canonical_ab.sql
index c2bc067..ae5b917 100644
--- a/db/routines/R__088_fn_forecast_pv_slots_range_canonical_ab.sql
+++ b/db/routines/R__088_fn_forecast_pv_slots_range_canonical_ab.sql
@@ -78,7 +78,7 @@ as $fn$
     from factor_raw
   ),
   profile as (
-    select ems.fn_pv_forecast_delta_profile(
+    select ems.fn_pv_forecast_delta_profile_cached(
       p_site_id,
       p_delta_data_from,
       p_delta_data_to,
diff --git a/db/routines/R__090_fn_plan_compare_bundle.sql b/db/routines/R__090_fn_plan_compare_bundle.sql
new file mode 100644
index 0000000..cac7ff1
--- /dev/null
+++ b/db/routines/R__090_fn_plan_compare_bundle.sql
@@ -0,0 +1,60 @@
+-- Jedno volání DB pro GET /plan/compare (aktivní bundle + comparison run debug).
+
+create or replace function ems.fn_plan_compare_bundle(p_site_id int)
+returns jsonb
+language plpgsql
+stable
+as $fn$
+declare
+  v_active jsonb;
+  v_active_run_id int;
+  v_compare_run_id int;
+  v_comparison jsonb;
+begin
+  v_active := ems.fn_plan_current_bundle(p_site_id);
+  if v_active ? 'error' then
+    return v_active;
+  end if;
+
+  v_active_run_id := (v_active->'run'->>'id')::int;
+  if v_active_run_id is null then
+    return jsonb_build_object('error', 'no_active_plan');
+  end if;
+
+  select pr.id
+  into v_compare_run_id
+  from ems.planning_run pr
+  where pr.site_id = p_site_id
+    and pr.status = 'comparison'
+    and (pr.solver_params->>'comparison_of_run_id')::int = v_active_run_id
+  order by pr.created_at desc
+  limit 1;
+
+  if v_compare_run_id is null then
+    select pr.id
+    into v_compare_run_id
+    from ems.planning_run pr
+    where pr.site_id = p_site_id
+      and pr.status = 'comparison'
+    order by pr.created_at desc
+    limit 1;
+  end if;
+
+  if v_compare_run_id is null then
+    return jsonb_build_object('error', 'no_comparison_plan');
+  end if;
+
+  v_comparison := ems.fn_planning_run_debug(v_compare_run_id);
+  if v_comparison is null then
+    return jsonb_build_object('error', 'no_comparison_plan');
+  end if;
+
+  return jsonb_build_object(
+    'active', v_active,
+    'comparison', v_comparison
+  );
+end;
+$fn$;
+
+comment on function ems.fn_plan_compare_bundle(int) is
+  'Aktivní plán + comparison planning_run (GET /plan/compare).';
diff --git a/docs/04-modules/forecast.md b/docs/04-modules/forecast.md
index f002c15..b74ae39 100644
--- a/docs/04-modules/forecast.md
+++ b/docs/04-modules/forecast.md
@@ -110,6 +110,7 @@ power_w = (poa_global * area_m2 * 0.20 * shading_factor).clip(
 - Default je `7` dní.
 - Endpoint `GET /api/v1/sites/{site_id}/forecast/pv?date=YYYY-MM-DD` vrací vždy poslední `ok` run per `(interval_start, pv_array_id)` (`DISTINCT ON`), takže UI nevidí duplikáty z historických běhů.
 - **Kalibrace delty:** `GET /api/v1/sites/{site_id}/forecast/pv-delta-profile?from=…&to=…` vrací JSON z `ems.fn_pv_forecast_delta_profile` (`deltas`, `deltas_by_array`, `delta_learn_min_ts` z `ems.site_pv_forecast_calibration`). Volitelné query parametry: `half_life_days`, `threshold_w`, `top_n_days`, `non_top_day_factor`, `day_weight_gamma` (NULL u numerických přepsání = hodnota z kalibrační tabulky / default funkce).
+- **Cache delty (V079):** sloupce `delta_profile_cache` / `delta_profile_cached_at` v `site_pv_forecast_calibration`; refresh `ems.fn_refresh_site_pv_delta_profile_cache(site_id)` po `fn_fill_forecast_accuracy` a po PATCH kalibrace; čtení pro plánování/UI přes `fn_pv_forecast_delta_profile_cached` (TTL 30 min, pak fallback na plný přepočet).
 - **Úprava kalibrace z API:** `PATCH /api/v1/sites/{site_id}/configuration/pv-forecast-calibration` s JSON tělem (částečný update); odpověď je aktuální řádek kalibrace. Souhrn konfigurace v `GET …/configuration` obsahuje klíč `pv_forecast_calibration`.
 - **Telemetrie pro učení delty:** `telemetry_collector` při Modbus poll čte reg. **145** a **178**; `fn_telemetry_inverter_sample` ukládá `is_export_limited` / `pv_derating_flags` (bity 1 = solar sell off, 2 = GEN/MI cut-off aktivní dle masky `(reg178 & 3) == 3`). `fn_fill_forecast_accuracy` sloty s těmito signály označí `telemetry_derating`.
 
diff --git a/docs/04-modules/planning.md b/docs/04-modules/planning.md
index fcb3483..da4a4ca 100644
--- a/docs/04-modules/planning.md
+++ b/docs/04-modules/planning.md
@@ -652,7 +652,8 @@ Planner v2 má do `planning_interval` zapisovat stejné základní položky jako
 - přepnutí mezi v1 a v2 bude na úrovni orchestrace nebo konfigurace lokality
 - exportér i control pipeline mají dál číst standardní výstup z `planning_interval`
 - pokud je zapnuté `PLANNING_ENGINE_COMPARE_ENABLED`, backend spočítá obě verze nad stejným vstupem, aktivní verzi zapíše do plánu a druhou uloží i jako samostatný read-only `planning_run` se stavem `comparison`
-- compare čtení jde přes `GET /api/v1/sites/{site_id}/plan/compare` a endpoint páruje compare run na aktivní run přes `comparison_of_run_id`
+- compare čtení jde přes `GET /api/v1/sites/{site_id}/plan/compare` → jedno volání `ems.fn_plan_compare_bundle` (aktivní plán + `fn_planning_run_debug` comparison runu)
+- **Výkon `/plan/current` a `/plan/compare` (V079+):** read-model `ems.fn_plan_current_bundle` dříve při každém HTTP requestu přepočítával `fn_pv_forecast_delta_profile` nad celou historií `forecast_accuracy` (~stovky tisíc řádků na site) a kanonický PV forecast na 96 h. Od **V079** se delta profil cacheuje v `site_pv_forecast_calibration.delta_profile_cache` (refresh po `fn_fill_forecast_accuracy` a po `PATCH …/pv-forecast-calibration` přes `fn_refresh_site_pv_delta_profile_cache`; čtení přes `fn_pv_forecast_delta_profile_cached`, TTL 30 min). Kanonický PV pro graf se počítá jen za horizontem uloženého plánu (`horizon_end` → `horizon_start + 96 h`), ne pro sloty už v `planning_interval`. Ověření: `curl -w '%{time_total}\n' http://…/plan/current` před/po migraci; první request po deployi může být pomalý dokud cache nezaplní job (15 min) nebo ručně `select ems.fn_refresh_site_pv_delta_profile_cache(<site_id>);`
 - FE stránka `frontend/src/pages/Planning.tsx` ukazuje souhrn aktivní verze, compare verze, slotové rozdíly a compare křivku baterie v grafu
 - fyzicky se na střídač aplikuje jen aktivní plán; compare běh slouží jen pro audit a vizualizaci