Ember Global Electricity Review 2026: Renewables Overtake Coal With 33.8% Share as India's Fossil Generation Falls 3.3%
The Ember Global Electricity Review 2026 is not a projection, it is a confirmed structural crossing. The question now is whether the transition can hold as electricity demand accelerates and hydropower stagnates.
The global power system crossed a threshold in 2025 that had not been reached since 1919: renewable energy sources collectively generated more electricity than coal for the first time in the modern grid era. Ember's Global Electricity Review 2026, covering data from 215 countries, confirms this is a structural shift rather than a statistical artefact, and India's role in making it happen is specific, measurable, and underreported.
The numbers establish the magnitude. Renewables reached 33.8 percent of global electricity generation in 2025, crossing above coal's 33.0 percent share as global fossil fuel generation fell by 0.2 percent, a decline of 38 terawatt hours. Solar alone accounted for 75 percent of all global electricity demand growth, expanding 30 percent year on year to 2,778 TWh. Battery storage costs fell 45 percent in a single year, following a 20 percent drop in 2024. These are not incremental improvements. They are cost curve dynamics now moving faster than any energy policy cycle.
India's specific contribution to the crossing is structural, not coincidental. Fossil generation in India fell 3.3 percent in 2025, a decline of 52 TWh, as renewable output grew 24 percent and solar overtook hydropower as the country's largest clean energy source for the first time. India installed 38 GW of solar capacity in 2025, surpassing the United States in annual additions. Taken together with China's simultaneous fossil generation decline, the two largest growth markets for electricity on the planet absorbed their demand expansion through clean power rather than coal. That is the mechanism by which the global crossover occurred.
The geography of this transition contains an important asymmetry. Renewables have overtaken coal in every major global region except Asia, where coal still accounts for 52 percent of electricity generation against renewables at 32 percent. Asia hosts 82 percent of global coal-fired electricity. India and China moved in the right direction in 2025, but they did so from a base in which thermal capacity remains the dominant dispatchable anchor of the grid. The crossing is real. The structural dependency has not yet been dismantled.
The constraint that will determine whether 2025 marks an inflection or a single-year deviation is hydropower and storage. Global hydropower grew by just 3 TWh in 2025 — effectively flat ,masking severe regional variation driven by rainfall patterns. Solar and wind are variable by nature; without flexible dispatchable capacity or storage at scale, their expansion creates grid balancing pressure that markets have only begun to price. India's own grid already shows this tension, with coal still covering non-solar peak hours even as installed renewable capacity hits records.
The commercial implication of Ember's findings is a reorientation of where capital formation risk now sits in the energy system. The constraint is no longer generation economics ,solar and storage have resolved that question. The constraint is grid infrastructure: transmission, balancing mechanisms, and the financial capacity of distribution companies to absorb procurement costs for round-the-clock renewable supply. For investors, this means the alpha has migrated from plant-level solar returns to grid services, flexible capacity, and storage-linked offtake structures. India, which installed more solar in 2025 than any year in its history, is about to discover that the hard part was never the panels.