I-SEM Daily Briefing — 29 September 2026
Table of Contents
Market Snapshot
| Metric | Value |
|---|---|
| Mean DAM Price | €158.37/MWh |
| Median Price | €166.48/MWh |
| Std Dev | €36.16/MWh |
| Peak Price | €206.03/MWh (07:30) |
| Min Price | €83.46/MWh (13:30) |
| Price Range | €122.57/MWh |
| Periods above €150 | 33 of 48 (69%) |
| Periods above €200 | 3 of 48 (6%) |
| Peak Avg (07–22) | €151.53/MWh |
| Off-peak Avg (22–07) | €169.78/MWh |
| Peak/Off-Peak Spread | €-18.25/MWh |
| Cheap/Dear Spread | €87.56/MWh → €201.7/MWh (€114.14) |
| Wind % of Demand | 66.2% |
| Wind Range | 56.2%–77.6% |
| Mean Demand | 4265 MW |
Price Profile #
Std dev €36.16/MWh · Median €166.48/MWh · Periods above €150: 33 of 48 (69%)
Price vs Wind #
Mean wind: 66.2% · Range: 56.2%–77.6%
Week in Context #
Price Duration Curve #
Periods above €150: 33 (69% of day) · Above €200: 3 (6% of day)
Peak / Off-Peak Spread #
Peak avg (07:00–22:00): €151.53/MWh · Off-peak avg: €169.78/MWh · Spread: €-18.25/MWh
Cheap window: €87.56/MWh · Dear window: €201.7/MWh · Spread: €114.14/MWh — the actual cheapest and dearest 2-hour blocks of the day, wherever they fall on the clock
Commentary #
Half-hourly data — 2026-09-29
| Period | Time | Price (€/MWh) | Wind % |
|---|---|---|---|
| 1 | 23:00 | 198.27 | 67.3% |
| 2 | 23:30 | 191.16 | 65.8% |
| 3 | 00:00 | 184.15 | 71.6% |
| 4 | 00:30 | 180.80 | 75.4% |
| 5 | 01:00 | 180.04 | 74.9% |
| 6 | 01:30 | 173.10 | 75.7% |
| 7 | 02:00 | 168.17 | 75.5% |
| 8 | 02:30 | 165.00 | 74.9% |
| 9 | 03:00 | 164.00 | 75.0% |
| 10 | 03:30 | 158.03 | 75.8% |
| 11 | 04:00 | 159.67 | 76.1% |
| 12 | 04:30 | 156.80 | 77.6% |
| 13 | 05:00 | 164.23 | 76.7% |
| 14 | 05:30 | 167.50 | 75.2% |
| 15 | 06:00 | 193.49 | 73.0% |
| 16 | 06:30 | 205.00 | 70.5% |
| 17 | 07:00 | 202.30 | 67.7% |
| 18 | 07:30 | 206.03 | 64.9% |
| 19 | 08:00 | 185.00 | 65.4% |
| 20 | 08:30 | 181.44 | 65.3% |
| 21 | 09:00 | 167.30 | 64.6% |
| 22 | 09:30 | 161.00 | 64.1% |
| 23 | 10:00 | 135.00 | 64.3% |
| 24 | 10:30 | 128.00 | 63.9% |
| 25 | 11:00 | 103.52 | 63.7% |
| 26 | 11:30 | 97.06 | 65.5% |
| 27 | 12:00 | 90.10 | 64.1% |
| 28 | 12:30 | 90.80 | 63.7% |
| 29 | 13:00 | 85.90 | 65.5% |
| 30 | 13:30 | 83.46 | 64.9% |
| 31 | 14:00 | 99.40 | 64.7% |
| 32 | 14:30 | 102.53 | 63.8% |
| 33 | 15:00 | 132.67 | 63.4% |
| 34 | 15:30 | 132.83 | 62.2% |
| 35 | 16:00 | 165.66 | 59.4% |
| 36 | 16:30 | 173.00 | 57.6% |
| 37 | 17:00 | 192.44 | 56.8% |
| 38 | 17:30 | 197.90 | 56.2% |
| 39 | 18:00 | 197.87 | 56.8% |
| 40 | 18:30 | 198.15 | 58.5% |
| 41 | 19:00 | 190.40 | 59.5% |
| 42 | 19:30 | 189.39 | 59.4% |
| 43 | 20:00 | 181.75 | 59.5% |
| 44 | 20:30 | 170.98 | 59.6% |
| 45 | 21:00 | 156.91 | 60.8% |
| 46 | 21:30 | 147.00 | 61.8% |
| 47 | 22:00 | 128.59 | 64.0% |
| 48 | 22:30 | 118.01 | 64.6% |
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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