China's Clean Energy Dominance Carries Supply-Chain Risk as 8% Annual Growth Forecast Assumes Stable Trade
A WTW report projects renewable generation growing 8% annually through 2030, but flags rising supply-chain vulnerabilities concentrated in Chinese manufacturing.
Renewable energy generation is on course to expand at 8% annually through 2030, according to a WTW report published on Monday (2026-07-20), but the forecast comes with an increasingly prominent caveat: the supply chains underpinning that growth are concentrated in China and exposed to geopolitical disruption at a moment when trade fragmentation is accelerating.7
April 2026 data from the Centre for Research on Energy and Clean Air showed how quickly physical trade routes can compromise even the world's largest energy market. Strait of Hormuz shipping disruptions cut China's crude oil imports by roughly 20% year-on-year and natural gas imports by around 13% in that month alone. The squeeze pushed coal power higher for the fourth consecutive month, with total power generation rising an estimated 6.6% year-on-year despite the import shortfall, as utilities leaned on domestic coal to compensate.1
That coal rebound sits awkwardly against China's simultaneous grip on the hardware the rest of the world needs to build out clean power. Chinese photovoltaic cell exports surged 346% year-on-year, reaching $39.96 million, while lithium-ion battery exports rose 20.8% to $780 million, according to trade data reported by oilprice.com. Beijing's near-monopoly in these components means any deterioration in trade relations — through sanctions, tariffs, or physical shipping disruption — transmits directly into project timelines and costs for buyers across Europe, the US, and Asia.5
Inside China, the domestic picture is more uneven than the export figures suggest. Solar power capacity additions fell 31% year-on-year in early 2026, reflecting the high base from 2025, and solar cell production dropped 25.6% year-on-year in April. Wind additions rose 8%. Battery output jumped 55.6% year-on-year, driven by energy storage demand and export orders. Thermal power commissioning in the first quarter surged more than 160% year-on-year to a record high — a trajectory difficult to reconcile with any scenario in which coal's share of global generation declines materially by 2030.1
Global investment appetite remains substantial. The IEA projects total energy investment will reach $3.4 trillion in 2026, with around $2.2 trillion flowing into electricity grids, battery storage, low-emission fuels, renewables, nuclear, and electrification. Grid investment alone is expected to rise nearly 20% year-on-year to around $550 billion, and battery storage investment is projected to cross $100 billion.3
Scale of investment, though, does not resolve the concentration problem. BloombergNEF data show global shipping of clean energy products reached $479 billion in 2025, rising just 1% — a figure that reflects both the size of the trade and the limited diversification of where it originates. Nearly 700 GW of new renewable capacity was installed globally in 2025, a record, and most of the hardware enabling that build passed through Chinese manufacturing at some point.6,4
The IEA's assessment earlier this year described the West Asia crisis and Hormuz disruptions as triggering the biggest rethink of energy security investment since the 1970s oil shocks. Nations are responding by investing in domestic energy sources — renewables, nuclear, grid infrastructure and, in some cases, coal — to reduce import exposure. But the renewable buildout they are funding remains dependent on imported Chinese components, creating a second-order vulnerability that energy security strategies have been slow to confront.3
The IEA forecasts renewable output growing by roughly 1,000 TWh annually through 2030, with solar PV accounting for over 600 TWh of that. At 8% annual generation growth, the WTW projection implies a deployment trajectory requiring sustained component flows from Chinese suppliers across a period of elevated trade friction. Whether those supply lines hold will depend on how relations between China and its largest clean energy customers evolve — specifically, whether sanctions or tariff escalation extends to the solar and battery sectors that underpin the transition timeline.7,2
The indicators worth tracking are not the headline investment projections, which have been rising for years. They are China's solar cell production run-rate — down 25.6% year-on-year in April — and the speed at which manufacturing capacity is being established outside China. Until that diversification accelerates materially, the 8% annual generation growth embedded in the WTW forecast carries a single-supplier dependency that neither the investment totals nor the decade-end targets have adequately addressed.1,7