For the first time, solar power became the European Union’s largest source of electricity in June 2026, generating 52 terawatt-hours (TWh) and supplying 25% of the bloc’s total demand, according to data released by energy think tank Ember on 15 July. The achievement marks a historic shift in Europe’s energy landscape, with solar outpacing nuclear (21%), gas (15%), wind (14%), hydro (12%), and coal (8%) during the month.
The record output in June 2026 follows two previous months—June 2025 and May 2026—when solar also led the EU’s electricity mix. The 52 TWh generated in June represents a more than twofold increase from the 21 TWh produced in June 2021, when solar accounted for just 10% of the EU’s electricity. Ember’s analysis highlights the rapid expansion of solar capacity, which has grown by over 20% annually between 2021 and 2025, making it the fastest-growing power source in the bloc.
Record Heat and Policy Support Drive Solar Expansion
Ember senior analyst Chris Rosslowe attributed the milestone to what he described as "stratospheric" growth that has consistently exceeded expectations. "Solar has evolved from a marginal player to a cornerstone of Europe’s energy system in just a few years," Rosslowe said. "The combination of falling costs, policy support, and public demand for clean energy has accelerated its adoption."
The surge in solar generation coincided with extreme summer temperatures across Europe, which drove up electricity demand for air conditioning and cooling. Long daylight hours and clear skies maximised solar output, helping to compensate for reduced performance from other sources. Wind power, for example, supplied 14% of the EU’s electricity in June 2026, down from 18% in June 2025, due to unusually calm weather. Hydroelectric output also fell to its lowest level in five years, contributing just 12% of the mix as drought conditions affected water flows in key rivers.
The EU added 65.1 gigawatts (GW) of new solar capacity in 2025 alone, nearly triple the 23 GW installed in 2021. This expansion has been widespread, with 18 EU member states setting new monthly records for solar’s share of electricity generation in the first half of 2026. The growth reflects a broader trend of increasing investment in renewable energy, driven by both climate goals and energy security concerns.
National Leaders Showcase Solar’s Potential
Spain, Germany, and Poland emerged as standout performers in June 2026, each achieving record shares of solar generation. Spain led the way with solar supplying 34% of its electricity, a milestone that Ember linked to the country’s robust renewable energy policies. The think tank estimated that Spain’s shift toward solar helped shield consumers from energy price spikes following geopolitical tensions in the Middle East, saving households approximately €10 per month on electricity bills.
Germany, Europe’s largest economy, also set a new record, with solar providing 36% of its electricity in June 2026, up from 33% in May. The country’s rapid deployment of solar panels has been supported by government incentives and a strong public commitment to phasing out fossil fuels. Meanwhile, Poland, traditionally one of the EU’s most coal-dependent nations, generated 24% of its electricity from solar in June 2026. The country has added more than 20 GW of solar capacity since 2020, positioning itself as one of Europe’s fastest-growing solar markets.
Despite these gains, challenges remain. Ember’s analysis did not quantify the impact of solar growth on carbon emissions or the displacement of fossil fuels. However, the think tank noted that increased solar capacity has reduced reliance on gas and coal during peak demand periods, particularly in countries with strong renewable energy policies. The variability of solar output also underscores the need for complementary energy storage solutions and grid upgrades to ensure stability.
Consumer Impact and Future Outlook
The rise of solar has introduced new dynamics in electricity pricing across Europe. In Spain, the increased share of solar generation has contributed to lower wholesale prices during daylight hours, though the effect on household bills varies by country. EnergySage, a solar marketplace based in White River Junction, Vermont, reported a 15% increase in residential solar installations across Europe in the first half of 2026 compared to the same period in 2025. The growth was driven by high electricity prices and government incentives aimed at accelerating the transition to renewable energy.
Looking ahead, Ember’s data suggests that solar will continue to play a central role in Europe’s energy transition. The think tank’s findings align with broader trends in the global energy sector, where solar is increasingly recognised as a cost-effective and scalable solution to reducing carbon emissions. As the EU works toward its 2030 climate targets, the expansion of solar capacity is expected to remain a key priority for policymakers and industry leaders alike.
