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06.08.2025    Montel Analytics    Following the April 28 blackout, Spanish authorities introduced a cap on solar PV generation, limiting it to an average of 9 GW,

 to ensure voltage stability and system reliability. This cap remains in place, with dispatchable sources like gas-fired plants now prioritised.

📊 Our latest analysis compares generation and pricing trends before and after the blackout:

➡️ May 2025: Record-low prices despite more gas

▪️Day-ahead power price fell to €16/MWh, the lowest monthly average this year.

▪️Demand held steady at 24 GW.

▪️Hydropower generation averaged 4 GW, providing cost-efficient, dispatchable supply.

▪️Gas-fired output remained moderate at 3.6 GW.

▪️Solar PV, though curtailed, consistently hit the 9 GW cap during the day, lowering net load during peak hours.

➡️ June 2025: Market tightens

▪️Demand rose to 28 GW due to hotter weather and higher cooling loads.

▪️Hydropower declined to 3 GW.

▪️CCGT generation increased to 5.5 GW, raising the share of high marginal-cost generation.

▪️Day-ahead prices jumped to €72.6/MWh.

📈 The shift in fundamentals shows how operational limits, weather, and generation mix continue to shape Spain’s power price outcomes.