I-SEM Daily Briefing — 29 July 2026

Price Profile #

Std dev €28.14/MWh · Median €163.22/MWh · Periods above €150: 38 of 48 (79%)

Price vs Wind #

Mean wind: 14.5% · Range: 9.3%–23.2%

Week in Context #

Price Duration Curve #

Periods above €150: 38 (79% of day) · Above €200: 12 (25% of day)

Peak / Off-Peak Spread #

Peak avg (07:00–22:00): €183.52/MWh · Off-peak avg: €160.13/MWh · Spread: €23.39/MWh

BESS Dispatch Signal #

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

Commentary #

Wind dropped back to 14.5%, the second-lowest reading of the week, and the market responded exactly as it did on Thursday: flat and high, with 38 of 48 periods clearing above €150 and a full quarter of the day above €200. The morning ramp from 06:30 to 09:00 pushed price from €174.40 to a €215+ plateau as wind sat under 12%, and the evening did the same thing again — wind falling from 13% at 17:00 to 9.3% by 20:30 drove price to the day’s €223.09 peak.

There was barely a trough at all. The cheapest period, €141.56 at 14:00, is higher than several days’ peaks this week. Peak/off-peak spread came in positive at €23.39, back in line with Monday and Thursday — whenever wind sits under 20%, this market simply runs tight all day, with no meaningful daytime relief.

Storage cleared €93 gross on a 32.5% ROI — respectable, but nowhere near the wind-day numbers from Saturday and Sunday. The week bookends neatly: it opened on a thin, low-wind Thursday and closes on much the same shape. The volatile middle of the week was the exception, not the rule, and that’s exactly when the battery made its money.