The world’s energy transition is no longer just about replacing one fuel with another. It’s about changing the way economies are powered.
For decades, growth in energy demand was spread across oil, coal and natural gas. Today, electricity is increasingly taking centre stage. The International Energy Agency’s (IEA) latest Global Energy Review argues the shift has become so significant that the world has entered what it calls the “Age of Electricity”, with power demand growing more than twice as fast as overall energy consumption.
The change reaches far beyond the energy sector. It is reshaping investment decisions, infrastructure planning and industrial policy as governments and businesses prepare for an economy where electricity plays an ever larger role in transport, manufacturing, buildings and digital infrastructure.
Electricity takes the lead
Global energy demand continued to grow in 2025, but the way that demand was met looked very different from previous years.
Overall energy demand rose by 1.3%, slower than in 2024 as economic growth eased, cooling demand fell and energy efficiency improved. Yet electricity demand increased by almost 3%, growing around 2.3 times faster than total energy demand. The IEA says this reflects a structural shift rather than a temporary trend.
The drivers are becoming increasingly diverse. Electric vehicles continue to gain market share. Buildings are becoming more electrified through technologies such as heat pumps. Industry is consuming more electricity, while commercial buildings and household appliances continue to push demand higher.
Data centres are also adding to electricity use, although the IEA notes they still account for only a relatively small share of overall global demand growth despite their rapid expansion.
Solar becomes the growth engine
Perhaps the clearest sign of the changing energy landscape is where new electricity is coming from.
For the first time on record, solar photovoltaic power made the largest contribution to global energy demand growth, accounting for more than one-quarter of the increase. Combined with wind, nuclear, hydropower and other renewable sources, low-emissions technologies supplied almost 60% of additional global energy demand in 2025.
Solar’s growth has been particularly striking. The IEA says solar generation increased by a record 600 terawatt-hours during 2025, the largest annual increase ever recorded by any electricity source outside post-crisis recovery periods.
Solar alone accounted for around 70% of growth in global electricity generation, with expansion taking place across China, the United States, India and the Middle East rather than being concentrated in a single market.
Renewables are also changing the wider electricity mix. In the European Union, solar and wind together supplied 30% of electricity generation in 2025, overtaking fossil fuels for the first time.
Meanwhile, global growth in renewables and nuclear exceeded the total increase in electricity generation, meaning fossil fuel generation declined slightly even though it still accounts for more than half of worldwide electricity production.
Building the system behind the transition
Generating more clean electricity is only part of the challenge.
Delivering it reliably requires enormous investment in the infrastructure that sits behind the power system. Battery storage emerged as one of the fastest-growing energy technologies in 2025.
Global battery storage additions increased by about 40% to almost 110 gigawatts, while annual renewable capacity additions reached a record 800 gigawatts, three-quarters of which came from solar. Construction also began on more than 12 gigawatts of new nuclear capacity.
These investments reflect a broader reality. Electrification does not simply mean producing more renewable energy. It also requires stronger transmission networks, greater system flexibility, storage capacity and backup generation capable of balancing increasingly variable sources such as solar and wind.
The IEA notes that weather-related fluctuations during 2025 highlighted the importance of flexible power systems as renewable generation expands.
A different energy economy
The report also illustrates how technology is beginning to reshape demand for traditional fuels. Electric vehicle sales climbed by more than 20% during 2025 to exceed 20 million units, helping to moderate growth in oil demand for road transport.
Oil consumption still increased, but at one of its slowest rates in years, while improvements in energy efficiency and the growing role of renewables also reduced pressure on fossil fuel demand.
The shift is not happening evenly across every country or region. Weather conditions, economic growth and national energy policies continue to shape outcomes. Even so, the broader direction appears increasingly clear.
Rather than simply consuming more energy, economies are becoming more dependent on electricity itself.
For the Cayman Islands, that trend carries implications well beyond the power sector. As electricity becomes the foundation for transport, digital infrastructure and economic activity, countries that invest in resilient energy systems will be better positioned to attract business and support long-term growth.
For an island that is expanding its digital economy while pursuing greater energy resilience, the global move towards electrification reinforces the importance of modernising infrastructure that can support a more electricity-intensive future.
