Global Renewable Surge: Solar Dominates 2025's Newly Installed Capacity

The world is witnessing a remarkable renewable energy transformation, with solar power emerging as the primary driver of this change. According to the latest report from the International Renewable Energy Agency (IRENA), the global solar capacity saw a staggering increase of 511 GW in 2025, with an average of 1.4 GW of solar capacity being installed every day.

This surge in solar power has pushed the total global solar capacity to an impressive 2.4 Terawatts (TW), making it the largest single source of renewable capacity, surpassing both wind and hydropower by more than 1 TW.

While the actual power generated from solar will be less than the rated capacity due to factors such as sunlight availability, the economics of solar have become increasingly favorable, leading to the installation of panels in areas that would have been considered questionable just a few years ago. This trend is expected to continue, with the capacity factor (the ratio of actual power generated to the maximum possible power) likely declining over the coming years.

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The impact of this renewable energy revolution is already being felt globally. In 2024, solar power generated 7% of the world's electricity, while wind and nuclear contributed 8% and 9%, respectively. This is despite solar having 1.9 times the capacity of wind, highlighting the importance of factors such as sunlight availability and technological advancements in driving the growth of solar power.

The continued expansion of renewable energy sources, particularly solar, is crucial for achieving global sustainability goals and reducing our reliance on fossil fuels. As the world grapples with the pressing issues of climate change and energy security, the rise of renewable energy, led by the dominance of solar power, offers a promising path forward.

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The data and insights provided by IRENA's report underscore the remarkable progress made in the renewable energy sector, with solar power leading the charge. This transformation has the potential to reshape the global energy landscape, paving the way for a more sustainable and resilient future.