Solar photovoltaic energy has ceased to be an alternative to become the great engine of the global energy transition.
In 2025, 510 GW of solar were installed, an absolute record that consolidated photovoltaics as the dominant energy infrastructure of the 21st century. According to data from IRENA and America Clean Power, solar represented nearly three-quarters of all new renewable additions for the year.
The global accumulated capacity reached 2,383 GW, demonstrating that solar is no longer complementary: it is the structural axis of the new energy economy.
China: epicenter of the solar revolution
Chinese leadership explains much of the phenomenon:
- 1,200 GW accumulated by the end of 2025 (more than half of the global total).
- 314 GW installed in 2025 alone, equivalent to the entire historical capacity of the European Union.
- Between 2023 and 2025, it added 600 GW, the largest energy deployment ever made by a nation.
China concentrates 79% of Asian solar infrastructure and dominates the manufacturing of panels, batteries, and key components.
Europe and the United States: two different speeds
- Europe: reached 405 GW in 2025, with Germany as the leader (106 GW). Spain and Italy consolidate the Mediterranean axis with more than 40 GW each. Poland and the Netherlands emerge as relevant players.
- United States: made a leap in storage. In 2025, it added 16 GW of batteries, reaching 45 GW and 125 GWh operational, capable of supplying 31 million homes during peak hours.
Solar + storage: a new paradigm
The integration of solar energy and batteries redefines the electrical system:
- Allows storing electricity during peak production hours and releasing it during times of higher demand.
- IRENA considers that grid flexibility and storage will be decisive in surpassing 50% renewable penetration.
This advancement turns the solar-battery combination into a unique operational ecosystem, capable of ensuring stability and reliability in increasingly decentralized electrical systems.
Structural challenges of the transition
Despite the growth, challenges persist:
- Electrical grids: need to transform into smart and decentralized models.
- Regulatory obstacles: administrative delays and connection issues limit projects in Europe and the U.S.
- Global inequality: while China concentrates more than half of solar capacity, small island states barely represent 0.2% of the global infrastructure.
The energy transition is advancing, but not homogeneously. Unequal access to technology and financing creates gaps that could deepen if international cooperation policies are not articulated.
Solar photovoltaic energy has consolidated as the backbone of the new global energy system. With China as the industrial epicenter, Europe as a regulatory reference, and the United States advancing in storage, the world is moving towards a model where the combination of solar, batteries, and electrification will set the course for the 21st century.
