Even at record levels, renewable additions alone cannot carry the energy transition. That is the central message of the 2026 World Energy Transition Outlook, published today by the International Renewable Energy Agency (IRENA). The report calls for renewable-powered electrification to be placed at the heart of global energy strategy over the decade to 2035.
Irena: 24/7 case for renewables no longer theoretical
The report leaves no doubt that clean capacity has to take over from fossil-fuel systems step by step if the transition is to succeed. IRENA’s answer is electrification powered by renewables, backed by more efficient technologies and sustainable fuels. That combination would expand clean power, cut energy waste and keep up with rising demand, while bringing the energy system back in line with a 1.5°C pathway after the current overshoot in global temperatures.
Renewables scale up, but infrastructure lags
To get there, global installed renewable capacity would need to grow more than sevenfold, from 5.2 TW today to around 38.2 TW by 2050. Electricity’s share of final energy consumption would rise to 35 percent by 2035 and to more than 50 percent by 2050, with solar and wind supplying over 80 percent of power generation by the middle of the century.
IRENA’s main warning is that the infrastructure needed to support this growth is not keeping pace. Grid expansion, storage, flexibility and energy efficiency improvements all remain well below the levels needed to absorb new renewable capacity and meet fast-rising demand. Without rapid progress, IRENA cautions, these areas could become the main bottlenecks of the global energy transition.
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“The global energy transition is under stress,” said Francesco La Camera, Director-General of IRENA. “Record growth in renewables is not enough on its own: energy efficiency is falling short, grids are struggling to keep pace, and global energy demand continues to surge. We cannot deliver the transition by simply adding renewables to an unchanged energy system. We need reforms to build the infrastructure of a new energy system, one that is electrified, efficient, flexible and powered by renewables.”
He added: “Electrification, grids, storage, flexibility and energy efficiency are not merely supporting elements at the margins of this transformation; they are its backbone. The central question is how rapidly we can deploy these solutions together, at the scale required to keep the transition aligned with 1.5°C while ensuring energy security, affordability, competitiveness and broader social acceptance.”
A USD 47 trillion economic case
There is also a strong economic case for action. Under IRENA’s 1.5°C scenario, global GDP would be 1.1 percent higher each year than under business as usual, adding up to cumulative gains of around $47 trillion by 2050. Jobs in renewable energy could rise more than fivefold, from just over 16 million today to around 84 million by the middle of the century. As renewables become ever more competitive on cost, end-user electricity prices would fall by around 15 percent by 2050.
Delivering these gains will require a big step up in investment. IRENA puts the total needed at over $256 trillion between 2026 and 2050, or around $10.3 trillion a year on average. Most of this would go into renewable power, grids, flexibility and electrification of end uses.
The 2025–2035 affordability window
The report is just as clear about the social side of the transition. “The quality of the transition will matter as much as its speed,” said La Camera. “Our analysis shows that accelerated decarbonisation can strengthen investment, productivity, employment and welfare. Affordability, social protection and fair access to economic opportunities must be built into implementation from the outset to sustain public acceptance and ensure that the benefits of the transition are broadly shared.”
IRENA charts electrified path as fossils head below 20%
In the short term, however, household incomes are expected to remain below the level of IRENA’s planned energy scenario until around 2035, as investment is front-loaded and energy prices adjust. After that, they would rise to around 1.6 percent above that level by 2050. IRENA sees the decade to 2035 as the most politically sensitive period, when targeted measures to keep energy affordable, carefully timed reforms and support for affected workers and communities will be decisive.
Seven priorities for the decade to 2035
The main task for governments, IRENA argues, is to manage this change in an orderly way, keeping energy reliable, affordable and secure while speeding up the rollout of clean alternatives.
To that end, the report sets out seven priorities for action over the coming decade. These range from integrated energy and market planning and transition roadmaps tailored to each country, to modernised grids, stronger industrial and investment strategies, social and environmental policies that maximise the benefits, and closer international cooperation. Together, they form a practical agenda for turning existing ambitions into real change across the energy system.
The underlying message is that a well-managed move away from fossil fuels does not have to hold back economic development. It can strengthen competitiveness, resilience, public health and long-term prosperity, provided the next ten years are spent putting plans into practice. (hcn)
