Weaker Winds Prompt Fossil Fuel Resurgence in China’s Power Mix

During the final quarter of 2025, China’s electricity generation statistics revealed an unexpected reversal of recent decarbonisation trends, as coal‑ and gas‑fired plants collectively reclaimed a larger share of the national grid than they had occupied in the preceding months, a development directly attributable to an unseasonably calm wind period that throttled the output of the country’s expansive wind farms and to persistent transmission bottlenecks that prevented the efficient dispatch of the renewable electricity that was produced.

While the meteorological anomaly manifested itself as a measurable decline in wind speeds across the principal offshore and inland wind corridors, the concurrent grid constraints—characterised by overloaded transmission lines, inadequate regional balancing mechanisms, and delayed integration of newly commissioned renewable capacity—exacerbated the shortfall by forcing grid operators to resort to dispatching reserve fossil‑fuel generators, thereby illustrating the fragility of a system that remains heavily dependent on variable weather patterns and still struggles to reconcile abundant generation potential with the physical realities of its transmission infrastructure.

State‑owned grid companies, tasked with maintaining reliability, responded by prioritising the activation of pre‑existing thermal plants, a decision that, while technically justified under the exigencies of supply security, simultaneously underscored a policy gap wherein long‑term investment in grid reinforcement and ancillary services has lagged behind the rapid expansion of renewable installations, thereby creating a predictable feedback loop that rewards fossil‑fuel assets whenever renewable output dips below forecasted thresholds.

The episode, beyond its immediate statistical significance, serves as a tacit indictment of a planning paradigm that has, for years, celebrated headline renewable capacity targets without commensurately addressing the systemic upgrades required to accommodate variable generation, suggesting that until China resolves the disconnect between generation ambition and transmission capability, any future claims of a seamless green transition will remain, at best, a conditional promise vulnerable to the whims of wind and the inertia of existing institutional structures.

Published: April 29, 2026