Monthly electricity market report · MIBEL

Iberian electricity market — May 2025

Day-ahead price, demand and generation mix · ESIOS and OMIE data

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Average price

16.9 €

▼ −36.9% vs April 2025

Average demand

24.2 GW

▲ +0.5% vs April 2025

Renewables

63%

▼ −2 pp YoY · CO₂-free 78%

Negative periods

956

▲ +2631% YoY

Day-ahead market price

The day-ahead market averaged 16.9 €/MWh, −36.9% versus April 2025. In perspective it sits −71.1% against the 11-year May average (58.5 €/MWh): a somewhat cheap month. The year-on-year figure (−44.3% vs May 2024) is distorted by an anomalous base.

Hourly month heatmap

Hour ↑ · Day of month → -15 €/MWh · 135 €/MWh

-15 €/MWh

135 €/MWh

Daily average price comparison

Day of month · €/MWh

Demand

Peninsular demand averaged 24.2 GW, +0.5% on April 2025 and −1.1% YoY, peaking at 32.3 GW.

Hour · GW

Generation mix

On about 20.4 TWh scheduled (P48), renewables made up 63% and CO₂-free generation 78%.

Generation mix

Solar fotovoltaica

Hidráulica

Eólica

Nuclear

Ciclo combinado

Cogeneración

Solar térmica

Turbinación bombeo

Solar PV

23.8% −3%

Hydro

18.4% +23%

Wind

16.8% −19%

Nuclear

15.0% −14%

CCGT

12.5% +80%

Cogeneration

5.8% −12%

Solar thermal

2.7% −17%

Pumped-storage

2.2% −9%

Other renewables

1.6% +4%

Coal

0.7% −33%

Other

0.3%

Fuel / gas

0.0%

Historical context

187

May · €/MWh

Methodology

Price: ESIOS indicator 600 (Spain). Demand: ESIOS indicator 1293 (peninsular). Mix: P48 schedule by technology (REE/ESIOS), best estimate at month close — metered generation is published later; the check against the most recent metered month shows differences below 1%. Peninsular scope, full calendar month.