In 2025, the energy sector witnessed a transformative year as renewable energy, particularly solar power, overtook other sources in new generating capacity. This pivotal shift highlights the global effort to curb fossil fuel reliance amid mounting economic concerns and the pursuit of sustainable energy solutions.
The International Renewable Energy Agency (IRENA) reported that solar power installations contributed a remarkable 511 gigawatts (GW) of new capacity, making up three-quarters of all new renewable installations. This leap propelled total installed solar capacity to an impressive 2.4 terawatts (TW), positioning it as the largest single renewable energy source, surpassing both wind and hydroelectric power by over a terawatt.
The extraordinary growth of solar power is largely attributed to plummeting costs, allowing installations even in regions with less sunlight—a scenario previously considered uneconomic for photovoltaic setups. While this may result in a lower capacity factor, with generated power often falling short of installed capacity, the rapid pace of solar technology advancements has been remarkable. By 2024, solar energy accounted for 7% of global electricity, closely trailing wind at 8% and nuclear at 9%.
Beyond solar, wind and hydroelectric sectors also saw significant expansions, with new installations of 160 GW and 18 GW respectively. In total, renewables added 700 GW last year, representing a 16% rise and comprising 86% of total global capacity growth.
Francesco La Camera, the head of IRENA, emphasized that investments in renewables are not only environmentally sound but also economically advantageous amid volatile fossil fuel prices. Countries investing in renewable infrastructure tend to weather economic crises better, demonstrating resilience through energy diversification.
Globally, the total renewable energy capacity has surpassed 5.1 terawatts, with Asia leading the way due to China’s significant advancements in wind and solar energy. Europe follows closely with nearly a terawatt of installed capacity.
Key Takeaways:
- Solar energy emerged as the dominant force in renewable installations in 2025, driving three-quarters of new capacity.
- The global emphasis on renewable energy reflects a strategic shift in investment priorities, enhancing resilience against fossil fuel instability.
- Asia and Europe are leading regions in renewable capacity, with China spearheading growth in both solar and wind sectors.
- Continued expansion of renewable capacity offers both economic and environmental benefits, making a strong case for ongoing investments.
As global energy challenges mount, the sustained rise of renewables marks a seismic shift toward a more sustainable, innovative future in energy management and consumption.