After defying projections, solar's dramatic growth means it is now overtaking nuclear as a global power source. Here are seven reasons for solar's success, and where it might go from here.

The world's solar power is crossing a threshold. A decade ago, it barely registered on a global scale, providing just 1% of the world's power. In 2026, it will almost certainly increase to 10% of power, and overtake nuclear, a mainstay of electricity since the late 1970s.

Globally, solar electricity generation quietly overtook nuclear power (just) in 2025, according to statistics from UK-based energy think tank Ember. And BBC analysis of Ember data over the past 12 months up to September 2026 shows it clearly outstripping nuclear, producing 13% more power.

"[Solar] generating more electricity than all the world's nuclear power plants is a pretty insane stat, for sure," says Dave Jones, co-founder of Ember.

From China's vast arrays to a recent solar upsurge driven by escalating oil prices, the incredible rise of solar power has defied all projections. Here are seven ways it has become an apparently "unstoppable force" – and what the future looks like from here.

https://www.bbc.com/future/article/20261023-how-solar-became-bigger-than-nuclear