Renewable energy has reached a historic inflection point. In a milestone that energy analysts have anticipated for years, clean energy sources surpassed coal in global electricity generation for the first time in 2026, according to Ember's Global Electricity Review. With total installed renewable capacity hitting 5,149 gigawatts worldwide by the end of 2025, the energy transition has moved from aspiration to irreversible reality—and the pace of change is accelerating.

The Numbers Behind the Milestone

Data from the International Renewable Energy Agency (IRENA) confirms that global renewable power capacity reached 5,149 GW by the close of 2025, representing an addition of 692 GW in a single year and year-over-year growth of 15.5 percent. This expansion rate is the fastest ever recorded, driven by falling technology costs, supportive government policies, and surging corporate procurement of clean energy.

The composition of renewable capacity reveals solar photovoltaics' dominance. Solar PV accounts for 2,392 GW, representing 47 percent of the total renewable fleet. Hydropower follows at 1,296 GW (25 percent), with wind energy close behind at 1,291 GW (25 percent). The remaining capacity comprises bioenergy, geothermal, and marine energy sources. Notably, solar and wind together accounted for 96.8 percent of all new renewable capacity additions in 2025, underscoring the technologies that are driving the transition forward.

Ember's 2026 analysis of global power generation data delivers the headline figure: renewable energy sources generated 33.8 percent of global electricity in 2025, compared with coal's 33.0 percent. While the margin is slim, the symbolic crossover marks a tipping point. Coal generation has been declining in Europe and North America for over a decade, and even in Asia—coal's last stronghold—the growth trajectory has flattened as solar and wind become the cheapest sources of new electricity in most markets.

Solar's Unstoppable Rise and China's Dominant Role

Solar PV has emerged as the defining energy technology of the 2020s. Module prices have fallen by more than 90 percent since 2010, making solar the cheapest source of electricity generation in history across most of the world. The International Energy Agency (IEA) projects that solar PV will supply approximately 20 percent of global electricity by 2030, up from roughly 8 percent in 2025—a trajectory that would have seemed implausible just a decade ago.

China's role in this transformation cannot be overstated. The country has installed approximately 1,400 GW of renewable capacity, more than the next five countries combined. China manufactures over 80 percent of the world's solar panels, dominates lithium-ion battery production, and is the largest installer of wind turbines domestically and the leading exporter internationally. This concentration of manufacturing and deployment capacity has driven global costs down but has also raised supply chain concerns among Western policymakers seeking to build domestic clean energy industries.

The IEA's medium-term forecast projects that an additional 4,600 GW of renewable capacity will be added globally between 2025 and 2030, bringing total installed capacity close to 10,000 GW. This expansion would require annual investment exceeding $600 billion in generation assets alone, with additional hundreds of billions needed for grid infrastructure, energy storage, and transmission upgrades to accommodate variable renewable output.

Grids, Storage and the Integration Challenge

The rapid deployment of solar and wind is creating integration challenges that the power sector must address to sustain momentum. Grid congestion, curtailment of renewable output, and the mismatch between peak solar generation and evening electricity demand are becoming pressing issues in markets from California to Germany to Australia.

Energy storage is the critical enabling technology. Global battery storage capacity has grown rapidly, reaching approximately 100 GW by end of 2025, with lithium-ion systems dominating. However, storage deployment must accelerate dramatically—by a factor of six to ten—to support a grid where renewables supply 50 percent or more of electricity. Long-duration storage technologies, including iron-air batteries, compressed air systems, and green hydrogen, are progressing from pilot to commercial scale but remain years away from material deployment.

Grid modernization is equally urgent. The IEA estimates that global electricity grids require $600 billion in annual investment through 2030 to accommodate the projected renewable buildout. Transmission bottlenecks already delay project connections by two to five years in major markets including the United States, United Kingdom, and Brazil. Policymakers are responding with streamlined permitting processes, grid interconnection reforms, and massive infrastructure spending packages, but the scale of the challenge remains formidable.

Key Takeaways