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Day-ahead market
Concept

Day-ahead market

Electricity market clearing 24 hours ahead of delivery; primary wholesale price signal in Europe.

Last refreshed: 15 April 2026 · Appears in 1 active topic

Key Question

Why is Spain paying EUR 29/MWh while Italy pays EUR 133/MWh in the same single market?

Timeline for Day-ahead market

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Common Questions
Why are European electricity prices so different between countries right now?
Day-ahead prices diverged sharply in April 2026: Italy EUR 133/MWh, France EUR 96/MWh, Spain EUR 29/MWh. Interconnector congestion prevents cheap Spanish renewables from reaching Italy and Germany.Source: ACER / Lowdown
How does the European day-ahead electricity market work?
Generators and retailers submit bids by midday for each hour of the following day. The EUPHEMIA algorithm clears a single price per bidding zone per hour, linking markets across Europe through the single day-ahead coupling mechanism.
What is market splitting in European electricity?
Market splitting occurs when interconnectors between zones are congested; prices diverge instead of converging. The Spain-France and France-Italy splits in April 2026 produced a EUR 100+/MWh price range across the EU.

Background

The day-ahead electricity market is the principal wholesale mechanism by which European power prices are set. Bids from generators and retailers are submitted by midday for delivery in each hour of the following day; the market clears at a single price per bidding zone per hour. On 13 April 2026, day-ahead prices diverged sharply across Europe: Italy cleared at EUR 133/MWh, France at EUR 96/MWh, and Spain at EUR 29/MWh, illustrating how interconnector capacity, generation mix, and gas exposure create radically different price outcomes within the single market.

European day-ahead markets are coordinated through the EUPHEMIA algorithm, administered by EPEX SPOT, Nord Pool, and other exchanges. The single European price coupling (SDAC) mechanism links national day-ahead markets to optimise power flows across borders. Market splitting — where a single bidding zone splits into two when interconnectors are congested — explains the Spain-France-Italy spread visible in April 2026: Spain's surplus renewables and LNG capacity cannot flow north freely.

The day-ahead price is also the reference for many commercial and industrial electricity contracts in Europe. When day-ahead prices in Germany or Italy exceed EUR 100/MWh sustained over weeks, the competitiveness impact on energy-intensive industries becomes severe, triggering the kind of plant closure announcements seen from Ineos and Solvay in 2026.