Renewables to Add 4,800 GW by 2031 as Energy Security, Not Climate, Drives the Buildout, IEA Says

The International Energy Agency published its Renewables 2026 report on 6 November, and its headline number is hard to ignore: global renewable power capacity will grow by almost 4,800 gigawatts between 2026 and 2031, nearly 60 percent more than was added in the previous six years. Solar panels will account for more than three-quarters of that growth. Renewables already generate about a third of the world's electricity; within five years, the IEA says, they will be getting closer to half.

What changed is the motive. The report's blunt message is that energy security has overtaken environmental concern as the main policy driver. The disruption to global energy markets since the Iran war began at the end of February sharpened every government's focus on domestic energy sources, and the response has not been to drill more — it has been to build panels and turbines faster. That is a different kind of energy transition from the one debated at climate conferences: it is being bought as insurance, not as virtue, and insurance tends to survive changes of government better than virtue does.

The geography of the buildout is shifting with it. For the first time, the amount of renewable capacity added in emerging and developing economies outside China is expected to match that of advanced economies over the forecast period, with growth across sub-Saharan Africa and North Africa set to almost triple. India is emerging as the world's second-largest growth market, its total renewable capacity set to more than double by 2031; it has already crossed 300 gigawatts of non-fossil capacity, more than half its installed fleet. China's share of the global increase, meanwhile, is set to fall from over 60 percent in 2025 to an average of 53 percent — still the largest contributor by far, but no longer the story on its own.

There are reasons to treat the forecast with care rather than awe. Capacity is not generation: India holds 54 percent of its installed capacity in non-fossil sources but got only about 29 percent of its electricity from them last year, because the sun does not shine at dinnertime and the grid has to carry the power somewhere. The United States illustrates the counterweight — BloombergNEF expects a record 89 gigawatts of solar, wind and storage added in 2026, driven by expiring tax credits and data-centre demand, yet possible new gas capacity through 2030 has risen to 67.8 gigawatts, and new tariffs have already cut the long-term solar forecast by 7.5 percent. The transition is accelerating and being resisted at the same time, by the same governments, in the same budgets.

The number worth watching from here is not the capacity total but the generation share, published month by month. If renewables reach close to half of global electricity by 2031, the energy-security argument will have done what three decades of climate argument could not: make the transition the default choice of governments that do not agree with each other about anything else. If the share stalls in the low forties, it will mean the grid, the gas lobby and the tariff wars held the line — and the next IEA report will have a different story to tell. Either way, the test is now written in electricity, not in promises.

My prediction: by the end of 2031, renewable sources will supply at least 45 percent of global electricity generation.