I-SEM Daily Briefing — 30 September 2026
Table of Contents
Market Snapshot
| Metric | Value |
|---|---|
| Mean DAM Price | €142.52/MWh |
| Median Price | €137.04/MWh |
| Std Dev | €50.66/MWh |
| Peak Price | €226.88/MWh (20:00) |
| Min Price | €77.82/MWh (04:30) |
| Price Range | €149.06/MWh |
| Periods above €150 | 22 of 48 (46%) |
| Periods above €200 | 9 of 48 (19%) |
| Peak Avg (07–22) | €164.14/MWh |
| Off-peak Avg (22–07) | €106.48/MWh |
| Peak/Off-Peak Spread | €57.66/MWh |
| Cheap/Dear Spread | €79.1/MWh → €224.91/MWh (€145.81) |
| Wind % of Demand | 53.8% |
| Wind Range | 39.2%–65.2% |
| Mean Demand | 4042 MW |
Price Profile #
Std dev €50.66/MWh · Median €137.04/MWh · Periods above €150: 22 of 48 (46%)
Price vs Wind #
Mean wind: 53.8% · Range: 39.2%–65.2%
Week in Context #
Price Duration Curve #
Periods above €150: 22 (46% of day) · Above €200: 9 (19% of day)
Peak / Off-Peak Spread #
Peak avg (07:00–22:00): €164.14/MWh · Off-peak avg: €106.48/MWh · Spread: €57.66/MWh
Cheap window: €79.1/MWh · Dear window: €224.91/MWh · Spread: €145.81/MWh — the actual cheapest and dearest 2-hour blocks of the day, wherever they fall on the clock
Commentary #
Half-hourly data — 2026-09-30
| Period | Time | Price (€/MWh) | Wind % |
|---|---|---|---|
| 1 | 23:00 | 101.86 | 65.2% |
| 2 | 23:30 | 96.00 | 63.7% |
| 3 | 00:00 | 95.00 | 59.6% |
| 4 | 00:30 | 90.96 | 59.5% |
| 5 | 01:00 | 85.00 | 62.5% |
| 6 | 01:30 | 84.30 | 63.6% |
| 7 | 02:00 | 82.86 | 64.3% |
| 8 | 02:30 | 83.03 | 64.0% |
| 9 | 03:00 | 81.14 | 64.3% |
| 10 | 03:30 | 79.30 | 63.1% |
| 11 | 04:00 | 78.14 | 62.5% |
| 12 | 04:30 | 77.82 | 61.8% |
| 13 | 05:00 | 95.68 | 61.3% |
| 14 | 05:30 | 103.00 | 62.0% |
| 15 | 06:00 | 151.61 | 61.4% |
| 16 | 06:30 | 167.50 | 60.9% |
| 17 | 07:00 | 184.09 | 56.5% |
| 18 | 07:30 | 186.00 | 57.3% |
| 19 | 08:00 | 179.91 | 54.6% |
| 20 | 08:30 | 183.00 | 55.8% |
| 21 | 09:00 | 170.00 | 55.3% |
| 22 | 09:30 | 162.77 | 54.2% |
| 23 | 10:00 | 136.60 | 53.6% |
| 24 | 10:30 | 134.20 | 51.2% |
| 25 | 11:00 | 112.32 | 53.8% |
| 26 | 11:30 | 105.08 | 55.1% |
| 27 | 12:00 | 97.00 | 54.0% |
| 28 | 12:30 | 97.40 | 54.1% |
| 29 | 13:00 | 96.79 | 54.1% |
| 30 | 13:30 | 96.79 | 53.2% |
| 31 | 14:00 | 108.46 | 54.4% |
| 32 | 14:30 | 112.29 | 51.0% |
| 33 | 15:00 | 137.48 | 51.9% |
| 34 | 15:30 | 145.78 | 54.5% |
| 35 | 16:00 | 166.77 | 54.4% |
| 36 | 16:30 | 176.50 | 52.2% |
| 37 | 17:00 | 186.59 | 47.1% |
| 38 | 17:30 | 201.00 | 44.2% |
| 39 | 18:00 | 217.50 | 41.6% |
| 40 | 18:30 | 223.50 | 40.8% |
| 41 | 19:00 | 224.30 | 39.2% |
| 42 | 19:30 | 224.96 | 39.8% |
| 43 | 20:00 | 226.88 | 39.2% |
| 44 | 20:30 | 220.20 | 39.5% |
| 45 | 21:00 | 209.85 | 40.6% |
| 46 | 21:30 | 200.30 | 42.2% |
| 47 | 22:00 | 185.30 | 42.8% |
| 48 | 22:30 | 178.06 | 44.6% |
For the week-level picture and what it means if you're buying, see Weekly Analysis — 28 September–4 October 2026.
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