tl;dr: Solar power generation surpassed nuclear globally for the first time in April 2025, with solar capacity growing 27% to 2,383 GW while nuclear added just 1.5 GW to reach 399.5 GW, according to WNISR 2026. Nuclear's share of global electricity fell to 8.8%, its lowest in 45 years, with new reactor construction averaging nearly 11 years and concentrated almost entirely in China and Russia. The report also casts doubt on small modular reactors, noting that long-promised cost and deployment advantages have yet to materialize despite heavy public funding.