diff --git a/db/migration/V065__forecast_pv_interval_interval_start_index.sql b/db/migration/V065__forecast_pv_interval_interval_start_index.sql
new file mode 100644
index 0000000..24581ab
--- /dev/null
+++ b/db/migration/V065__forecast_pv_interval_interval_start_index.sql
@@ -0,0 +1,8 @@
+-- ============================================================
+-- Forecast PV: urychlení denních/range dotazů podle interval_start
+-- (fn_forecast_pv_split, pv-slots* funkce)
+-- ============================================================
+
+create index if not exists idx_forecast_pv_interval_start_run
+  on ems.forecast_pv_interval (interval_start, run_id);
+
diff --git a/db/migration/V066__latest_telemetry_distinct_on_indexes.sql b/db/migration/V066__latest_telemetry_distinct_on_indexes.sql
new file mode 100644
index 0000000..e812bdc
--- /dev/null
+++ b/db/migration/V066__latest_telemetry_distinct_on_indexes.sql
@@ -0,0 +1,18 @@
+-- =============================================================
+-- V066__latest_telemetry_distinct_on_indexes.sql
+-- Zrychlení view ems.vw_latest_* (PostgREST dashboard endpoints).
+--
+-- View používají DISTINCT ON (...) s ORDER BY ... measured_at desc.
+-- Bez odpovídajících indexů může plán spadnout na scan+sort nad
+-- velkými Timescale hypertabulkami (sekundy latency).
+-- =============================================================
+
+create index if not exists idx_telemetry_inverter_site_inverter_time_desc
+  on ems.telemetry_inverter (site_id, inverter_id, measured_at desc);
+
+create index if not exists idx_telemetry_ev_site_charger_connector_time_desc
+  on ems.telemetry_ev_charger (site_id, charger_id, connector_id, measured_at desc);
+
+create index if not exists idx_telemetry_hp_site_heat_pump_time_desc
+  on ems.telemetry_heat_pump (site_id, heat_pump_id, measured_at desc);
+
diff --git a/db/routines/R__023_fn_forecast_pv_split.sql b/db/routines/R__023_fn_forecast_pv_split.sql
index d85165d..eb7aeef 100644
--- a/db/routines/R__023_fn_forecast_pv_split.sql
+++ b/db/routines/R__023_fn_forecast_pv_split.sql
@@ -3,10 +3,21 @@ returns jsonb
 language sql
 stable
 as $fn$
-  with latest as (
+  with tz as (
+    select coalesce(nullif(trim(s.timezone), ''), 'Europe/Prague') as tz_name
+    from ems.site s
+    where s.id = p_site_id
+  ),
+  bounds as (
+    select
+      ((p_day::timestamp) at time zone tz.tz_name) as day_start_utc,
+      (((p_day + 1)::timestamp) at time zone tz.tz_name) as day_end_utc
+    from tz
+  ),
+  latest as (
     select distinct on (fpi.interval_start, fpr.pv_array_id)
       fpi.run_id,
-      fpi.pv_array_id,
+      fpr.pv_array_id,
       fpi.interval_start,
       fpi.power_w,
       fpi.irradiance_wm2,
@@ -18,22 +29,15 @@ as $fn$
     join ems.asset_pv_array apa
       on apa.id = fpr.pv_array_id
      and apa.site_id = fpr.site_id
+    cross join bounds b
     where fpr.site_id = p_site_id
-      and (
-        fpi.interval_start at time zone coalesce(
-          nullif(trim((select timezone from ems.site s where s.id = p_site_id)), ''),
-          'Europe/Prague'
-        )
-      )::date = p_day
       and fpr.status = 'ok'
+      and fpi.interval_start >= b.day_start_utc
+      and fpi.interval_start < b.day_end_utc
     order by fpi.interval_start, fpr.pv_array_id, fpr.created_at desc
   ),
   rows as (
     select
-      case
-        when controllable then 'a'
-        else 'b'
-      end as pole,
       jsonb_build_object(
         'run_id', run_id,
         'pv_array_id', pv_array_id,