Skip to main content
All insights

Solar is now the largest source of global energy-demand growth

For the first time solar supplied more than a quarter of the growth in global energy demand, and low-emissions sources together delivered nearly 60 percent.

By Carbon3 team1 min read

Carbon3 data card 'Solar supplied the largest share of global energy-demand growth for the first time': more than 25% of the growth in 2025 came from solar PV. Source: IEA.

For the first time, solar supplied the largest share of global energy-demand growth (>25%), while all low-emissions sources together delivered nearly 60%. The energy transition is increasingly shaping not just electricity, but the marginal source of global energy growth.

The significance of this shift is easy to understate. For most of the modern era, growth in energy demand was met mainly by adding fossil fuel supply. When the marginal unit of new demand is met by solar and other low-emissions sources, the emissions intensity of growth itself starts to fall, even before existing fossil assets are retired.

For companies with large Scope 3 footprints, the practical lesson is that the cheapest reductions in a value chain are increasingly found in how suppliers source power. Insetting gives buyers a way to co-finance that switch at supplier sites and to claim the verified reduction inside their own reporting boundary.

Originally published on LinkedIn, 31 August 2026.

The Carbon3 Newsletter

Weekly analysis of industrial decarbonization and insetting across Scope 1 to 3, from the Carbon3 team.

Next step

See the companies behind these figures in the Data Hub.

Look up your suppliers’ emissions and targets, free.