Renewable energy growth slows in 2026

After five years of record growth, the deployment of renewable energy is experiencing an unprecedented slowdown in 2026, according to the International Renewable Energy Agency (IRENA). This marks a significant shift in the global energy landscape.

Global renewable capacity reaches record levels

In 2025, the world added 692 gigawatts of renewable energy capacity, bringing the total to 5,149 gigawatts. This represented a 15.5 percent increase and highlighted the growing dominance of renewables in new electricity infrastructure.

China's grid struggles with renewable overproduction

China, which accounts for more than 40 percent of global renewable capacity, is facing a critical issue: its electrical grid is unable to absorb the vast amount of solar and wind energy being generated. In the first half of 2026, the country rejected enough renewable electricity to power Mexico for an entire year.

Grid challenges extend beyond China

Other countries, including Australia and Japan, are also encountering difficulties in integrating renewable energy into their electrical systems. In Australia, rooftop solar has overwhelmed local networks, while Japan's geography and outdated infrastructure complicate the addition of offshore wind power.

Europe accelerates grid modernization

In response to these challenges, Europe is speeding up the modernization of its electrical infrastructure. The European Commission estimates that 584 billion euros will be needed by 2030 to adapt the continent’s networks to decarbonization goals.

Infrastructure lags behind renewable construction

The time required to build high-voltage transmission lines—between five and ten years—far exceeds the time it takes to construct solar power plants, which can be operational in less than two years. This mismatch is creating a structural imbalance in the energy sector.

Renewable energy focus shifts to infrastructure

The challenge of renewable energy deployment is now moving from reducing costs to strengthening infrastructure and enhancing the flexibility of electrical systems. Investments must prioritize grid upgrades, battery storage, and demand management technologies.

Global concerns over meeting climate goals

IRENA warns that the slowdown in China may hinder global efforts to meet the Paris Agreement’s targets. Scenarios for limiting global warming to 1.5°C depend on rapid electrification and continued renewable energy growth, which could be jeopardized by prolonged delays.

Analysts see potential benefits in the slowdown

Some analysts view the temporary slowdown as an opportunity to address infrastructure weaknesses and lay the groundwork for sustainable expansion. The effectiveness of upcoming investments by governments will determine whether this period leads to a deeper slowdown or a more resilient energy future.