The Impact of Climate Change on Renewable Energy in Europe

The ongoing conflict in Iran has catalyzed a significant shift towards renewable energy in Europe, driven by the region's increasing reliance on fossil fuels and the volatility of oil and gas prices. The Strait of Hormuz, a critical passage for global oil supplies, has seen heightened tensions, leading to soaring energy costs. In response, many Europeans are investing in green technologies such as electric vehicles (EVs) and solar systems. However, the effectiveness of these renewable sources is being challenged by climate change, which is causing more extreme weather conditions that threaten their reliability.

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Solar energy generation is particularly vulnerable to rising temperatures. According to Ioanna Vergini, founder of wfy24.com, photovoltaic (PV) cells lose efficiency as temperatures increase, with a drop of approximately 0.4 to 0.5 percent for every degree above 25°C. During last summer's heatwaves, solar farms in Spain and Greece experienced significant output declines, coinciding with peak air-conditioning demand. Research from Imperial College London indicates that climate change has raised summer temperatures in Europe by an average of 3.6°C, further complicating solar energy production.

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Conversely, wind energy has seen a surge in generation, exemplified by the UK achieving a record output of 23,880 megawatts in March 2026. However, excessive wind speeds can lead to curtailment, where turbines are shut down to prevent grid overload. This resulted in substantial costs, with the UK incurring £1.47 billion in compensation for curtailment in 2025. Wind turbines also face operational limits; when wind speeds exceed 90 km/h, they enter 'survivability mode' to avoid structural damage, as seen during Storm Ciarán in late 2023.

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Hydropower, often referred to as Europe’s “biggest battery,” is also under strain due to climate change. Norway, a key player in hydropower generation, has reported its lowest snow reserves in two decades, resulting in a deficit of approximately 25 terawatt-hours (TWh) of energy. This shift in precipitation patterns, with more rain and less snow, complicates the predictability of hydropower generation, as snow provides a steady water supply during warmer months.

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The challenges facing renewable energy are exacerbated by Europe’s outdated energy grid. A report from energy think-tank Ember highlights that over 120 gigawatts of planned renewable projects are at risk due to insufficient grid capacity, particularly in countries like Austria, Bulgaria, and the Netherlands. The European Commission's EU Grids Package aims to address these issues with a €1.2 trillion investment to modernize the electricity system by 2050.

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Experts emphasize the need for improved forecasting, increased storage capacity, and grid enhancements to manage the variability of renewable energy sources effectively. The EU estimates that annual investments of around €85 billion in the power grid will be necessary to support the transition to renewable energy.

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“While renewable energy sources are central to reducing our carbon emissions and addressing climate change, they’re inherently dependent on environmental conditions,” — Thomas Balogun, Renewables Investor

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“Photovoltaic (PV) cells are semiconductors, and like all electronics, they lose efficiency as temperature rises.” — Ioanna Vergini, Founder of wfy24.com

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“The low snowpack in Norway this past winter is a good example of a broader shift: hydropower in Europe is becoming more variable,” — Alex Truby, Upstream Tech

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As Europe navigates the complexities of transitioning to renewable energy amidst climate change, the interplay between environmental conditions and energy production efficiency remains a critical concern. The future of renewable energy in Europe hinges on addressing these challenges through strategic investments and technological advancements.

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