I-SEM Daily Briefing — 24 July 2026

Market Snapshot

Metric	Value
Mean DAM Price	€171.0/MWh
Median Price	€176.8/MWh
Std Dev	€30.3/MWh
Peak Price	€240.76/MWh (23:00)
Min Price	€127.17/MWh (15:30)
Price Range	€113.59/MWh
Periods above €150	33 of 48 (69%)
Periods above €200	9 of 48 (19%)
Peak Avg (07–22)	€161.48/MWh
Off-peak Avg (22–07)	€186.87/MWh
Peak/Off-Peak Spread	€-25.39/MWh
Wind % of Demand	18.2%
Wind Range	7.4%–30.3%
Mean Demand	3749 MW

Price Profile #

Std dev €30.3/MWh · Median €176.8/MWh · Periods above €150: 33 of 48 (69%)

Price vs Wind #

Mean wind: 18.2% · Range: 7.4%–30.3%

Week in Context #

Price Duration Curve #

Periods above €150: 33 (69% of day) · Above €200: 9 (19% of day)

Peak / Off-Peak Spread #

Peak avg (07:00–22:00): €161.48/MWh · Off-peak avg: €186.87/MWh · Spread: €-25.39/MWh

BESS Dispatch Signal #

	Price	Time	Energy	Value
Charge	€129/MWh	14:30	2 MWh	−€257
Discharge	€205/MWh	19:00	1.7 MWh (85% RTE)	+€348
Gross profit				€91
Price spread	€76/MWh			ROI: 35.4%

Simulated 1MW/2MWh battery, one optimal DAM cycle. Gross before network charges and capacity costs.

Updated 2026-08-25: the BESS simulation previously allowed the discharge window to occur before the charge window ended, which is physically impossible for a battery. This day’s figure was recalculated enforcing charge-before-discharge; gross profit corrected from €105 to €91.

Commentary #

Wind nearly doubled on yesterday, averaging 18.2% and touching 30.3% through the evening, and the price shape responded by inverting. Peak/off-peak spread went negative (-€25.39) — the cheapest hours weren’t overnight, they were the early afternoon trough between 11:00 and 16:30, when wind held above 16% and prices sat pinned near €129, briefly touching €127.17. That’s the cannibalisation signature: wind supplying the middle of the day pushes clearing price down exactly when it’s generating most.

The two ends of the day tell the opposite story. Wind collapsed to single digits overnight and again in the first hour of trade, and price spiked to the day’s €240.76 peak at 23:00 as generation scrambled to cover the gap. Two-hundred-euro swings within the same 24 hours, driven almost entirely by wind moving between 7% and 30%.

Storage caught a modest slice of it: €91 gross, a 35.4% ROI, charging into the afternoon trough (€129, 14:30) and discharging into the evening peak (€205, 19:00). The lesson repeats — it’s the gap between the trough and the peak that pays, not the average price level.

Half-hourly data — 2026-07-24

Period	Time	Price (€/MWh)	Wind %
1	23:00	240.76	27.1%
2	23:30	219.32	27.8%
3	00:00	204.23	9.1%
4	00:30	187.96	8.8%
5	01:00	187.36	7.9%
6	01:30	179.30	7.4%
7	02:00	185.00	7.7%
8	02:30	177.59	7.8%
9	03:00	172.48	8.3%
10	03:30	171.80	9.5%
11	04:00	169.09	11.0%
12	04:30	167.45	11.4%
13	05:00	176.01	11.3%
14	05:30	176.01	12.2%
15	06:00	182.21	12.4%
16	06:30	190.00	12.6%
17	07:00	195.23	11.2%
18	07:30	203.84	11.2%
19	08:00	200.00	11.9%
20	08:30	188.19	12.7%
21	09:00	168.11	13.8%
22	09:30	162.01	15.7%
23	10:00	142.86	17.0%
24	10:30	135.62	19.5%
25	11:00	131.00	19.6%
26	11:30	129.30	19.9%
27	12:00	131.98	20.3%
28	12:30	129.30	19.0%
29	13:00	129.30	19.9%
30	13:30	129.30	19.7%
31	14:00	129.30	19.2%
32	14:30	128.82	17.9%
33	15:00	129.30	16.5%
34	15:30	127.17	16.1%
35	16:00	129.30	18.4%
36	16:30	130.92	20.1%
37	17:00	149.80	26.6%
38	17:30	157.00	29.1%
39	18:00	181.00	30.0%
40	18:30	186.01	30.3%
41	19:00	201.73	30.2%
42	19:30	204.34	29.0%
43	20:00	206.14	28.0%
44	20:30	207.27	27.2%
45	21:00	201.00	27.3%
46	21:30	199.22	27.9%
47	22:00	190.02	27.3%
48	22:30	187.13	28.0%