Clean Tech Manufacturing Investment Plunges: The Industrial Logic Behind the US-China Path Divergence

Sudden Cooling of Global Clean Technology Investment

Over the past decade, global clean technology manufacturing experienced a rare boom in investment. Manufacturing investment in solar PV, wind power, electric vehicles, batteries, and critical minerals surged from roughly $55 billion in 2018 to $265 billion in 2023—an increase of nearly fivefold. However, this momentum reversed in 2024 and accelerated its decline in 2025, when global investment fell to just $155 billion, 42% below the peak.

This contraction was not evenly distributed; it was concentrated mainly in China and the United States, the two former engines. Europe also saw a decline, but it was moderate, and since its peak occurred in 2024, the drop was more of a cyclical adjustment. The investment declines in China and the U.S., however, reflect two fundamentally different industrial logics.

China: Proactive Correction, Not Passive Decline

Over the past nearly two decades, China has built a highly distinctive industrial policy system. From central guidance to local implementation, supported by low-cost capital, land subsidies, and demand-side policies running through the entire upstream and downstream chain, China has turned its solar PV and electric vehicle supply chains into the world's most complete vertical system. This policy-driven model allowed China's clean technology manufacturing investment to expand from $37 billion in 2018 to $189 billion in 2023, with more than a fivefold increase absorbed almost entirely by the solar and EV supply chains.

But the imbalance between massive production capacity and domestic demand became impossible to ignore after 2023. Module prices fell 60% within two years, dragging the entire industry into price wars and profit compression. Beijing's policy toolbox quickly shifted direction: in 2024, the Ministry of Industry and Information Technology raised the capital adequacy ratio for new and expanded PV projects to 30% and tightened efficiency thresholds, effectively pushing the industry toward higher-end cell technology. The 2025 electricity market reform further pushed solar PV into an even more brutal price-competitive environment.

These actions are essentially a proactive capacity shakeout and industrial upgrade. China's domestic solar manufacturing investment plummeted 80% from its 2023 peak, leaving only about $16 billion by 2025. It should be emphasized that this decline occurred while corporate balance sheets remained healthy and supply-chain dominance remained solid—not because of any loss of industrial competitiveness. In fact, China still has a large amount of PV capacity under construction or announced—solar cell capacity under construction alone amounts to 458 GW, with another 1.3 TW announced but not yet started. If these plans are realized, they would more than double the existing 1.5 TW of cell capacity.

The deeper motivation behind China's proactive braking this time is a shift from "scale expansion" to "supply chain security and quality leadership." While domestic capacity is being cleared, many enterprises have begun relocating some low-value-added manufacturing links overseas, both to circumvent U.S. and European tariff barriers and to push into higher-margin markets. This indicates that China's industrial policy logic is evolving from "full industrial chain localization" toward "global footprint + domestic high-end upgrading."

United States: Investment Vacuum After Policy ReversalThe United States has taken a completely different path. Between 2018 and 2022, U.S. clean technology manufacturing investment growth was tepid, until the Inflation Reduction Act (IRA) and the Infrastructure Investment and Jobs Act (IIJA) came into being and ignited a wave of investment. In 2024, U.S. clean technology manufacturing investment peaked, but soon entered a downward trajectory. In 2025, investment fell 17% from that peak, marking the first annual decline in U.S. clean technology manufacturing investment.

Notably, the U.S. decline is not because companies have lost competitiveness, but because the policy foundation is being pulled out from under them. The Trump administration's repeal of several core IRA measures, combined with the rollback of demand-side policies and policy uncertainty around trade and tax credit eligibility, has caused a large number of planned investments to be canceled or shelved indefinitely. Many of those projects had once been expected to narrow the industrial gap between the United States and China; today they have come to nothing.

The United States also has a deeper problem: its industrial system relies too heavily on a single piece of legislation and lacks the kind of multi-layered, cross-cycle institutional support that China possesses. China's policy toolbox combines supply-side subsidies, demand-side quotas, competitive investment attraction by local governments, and capital injections from state-owned enterprises. The United States, by contrast, depends largely on federal tax credits and short-term fiscal stimulus. When the policy winds shift, investment quickly dies down. This structural difference leaves the United States with a huge gap vis-à-vis China in the continuity of industrial policy.

Solar PV and Electric Vehicles: A Mirror-Image Divergence

Solar PV is the most successful example of China's industrial policy. From installation subsidies in 2009, to feed-in tariffs in 2011, to mandatory quotas under the five-year plans, China used a phased package of policy measures to turn an originally high-cost industry into the world's most cost-competitive system. When European subsidies and U.S. tax credits fueled global demand in the late 2010s, Chinese manufacturers, equipped with integrated capacity from polysilicon to modules, captured most orders at extremely low prices.

Yet that very success also bred overinvestment. The concentrated release of capacity announced between 2020 and 2022 led to severe oversupply in 2023. Beijing responded by forcing industry consolidation through adjustments to capital adequacy ratios, upgrades to technical standards, and power market reforms. Today, although investment in China's solar PV industry has declined, technological iteration has not stopped. The industry is concentrating toward more efficient new technologies such as TOPCon, HJT, and even perovskite.

Electric vehicles and batteries are following a similar trajectory. Through purchase subsidies, the dual-credit policy, and charging infrastructure planning, the government created the world's largest new-energy vehicle market, propelling companies such as CATL and BYD to rapid global leadership. Now, in the face of slowing domestic penetration growth and tariff pressure from Europe and the United States, Chinese battery and EV companies are accelerating their overseas expansion, shifting from pure product exports to the export of technology and production capacity. The decline in China's domestic manufacturing investment does not mean China is exiting clean technology manufacturing; rather, the geographic map of its production capacity is changing.## The New Balance in Global Supply Chain Restructuring

Investment is contracting in tandem in both China and the United States, yet the two are preparing for entirely different futures. China, having already established its dominant position across the entire industrial chain, is undertaking a proactive structural adjustment—reducing the capital consumed per unit of capacity while shifting toward higher value-added links and overseas manufacturing footholds. The United States, by contrast, has encountered a policy vacuum before it could build a complete supply chain with global competitiveness, and its investment boom may stop in its tracks.

Europe's relatively stable level of investment reflects both its strategic pursuit of supply chain autonomy and its pragmatic calculation to find a position in the interstices of the Sino-American rivalry. The center of gravity of global clean technology manufacturing investment is shifting from a pattern of unipolar dominance by China to one of "China plus dispersed overseas nodes." Yet at this stage, China's combined advantages in technological maturity, cost structure, industrial chain completeness, and policy continuity remain difficult to replace in the short term.

The key variables over the next five years will be how China calibrates the intensity of capacity clearance, and whether Chinese companies' overseas investment can replicate domestic cost efficiency under the pressure of trade barriers. Equally important is whether the United States can retain the investment momentum it has already built in the absence of policy support, or whether it will completely cede its competitive position in clean technology manufacturing. From this perspective, the current investment downturn is not merely a cyclical adjustment, but a reshaping of the power structure of the global clean energy industry.