Europe: Solar and wind output trends across major markets in May 2026

In the week of May 11, solar photovoltaic energy production increased in most European electricity markets compared to the previous week. The Italian market recorded the largest increase, rising 19%, after two consecutive weeks of declines. The German market saw the smallest growth, with just 0.5%, while Spain and France continued their upward trend for a second week in a row, increasing by 6.1% and 8.5%, respectively. The Portuguese market was the only exception, where photovoltaic generation decreased by 3.0%.

For the week of May 18, AleaSoft Energy Forecasting’s solar outlook indicated higher solar generation in Italy, Germany, and Spain. This suggests a continuation of relatively strong photovoltaic output across key European power markets, driven by seasonal conditions and improving solar resource availability.

During the second week of May, wind energy production also increased across most European electricity markets compared to the previous week. Germany experienced the most significant rise, with wind generation jumping 120%, effectively reversing the downward trend seen in the previous two weeks. Spain recorded the smallest increase at 21%, extending its growth streak to a third consecutive week. France and Italy also saw strong rebounds, with increases of 50% and 100%, respectively, after prior periods of decline. In contrast, Portugal experienced a 7.1% decrease in wind output.

A notable highlight of the week was Tuesday, May 12, when the German market reached its highest daily wind energy production for May in the past four years, totaling 623 GWh. This underscores the volatility and scale of wind generation potential in Europe’s largest power market.

For the third week of May, AleaSoft Energy Forecasting’s wind forecasts point toward lower wind production across all analyzed European markets, signaling a potential short-term reversal after the strong gains observed in the previous week, AleaSoft reports.

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