China Solar Efficiency Standards Target Overcapacity

China has issued new mandatory energy consumption and efficiency standards for the solar power industry, marking a significant state-led intervention to curb a severe supply glut that has battered the sector for more than three years. The regulations, which take effect on January 1, 2027, set minimum efficiency requirements across the entire solar manufacturing supply chain — covering polysilicon, wafers, modules, and inverters — in an effort to eliminate outdated production capacity and push the industry toward higher-quality output.

The Overcapacity Crisis

China’s solar industry has been locked in a brutal price war since 2023, triggered by rapid capacity expansion that far outstripped global demand. The roots of this crisis trace back to 2020, when President Xi Jinping unveiled China’s “dual-carbon” goals, sparking a wave of investment in solar manufacturing. By 2023, capacity growth had dramatically outpaced demand, igniting a price war that has persisted for over three years.

The financial toll has been staggering. According to Caixin Global, combined losses for listed Chinese solar companies in 2025 are estimated to exceed 50 billion yuan ($7.3 billion). Tongwei Co. Ltd., the world’s largest manufacturer of polysilicon and solar cells, projected a loss of up to 10 billion yuan in 2025, on top of a 7 billion yuan loss the previous year. Across the supply chain, major players including wafer giant TCL Zhonghuan and module leader Trina Solar have also warned of multi-billion-yuan losses.

From Failed Self-Rescue to Regulatory Intervention

The industry’s attempts to stabilize itself through coordinated action have met significant obstacles. Since late 2024, manufacturers tried to organize production cuts and established a joint venture — Beijing Guanghe Qiancheng Technology — designed to absorb excess polysilicon capacity from struggling smaller producers. However, in January 2026, China’s antitrust watchdog abruptly halted the plan, citing monopoly risks.

With market-based coordination blocked, Beijing has pivoted to technical regulation. The new mandatory efficiency standards represent a fundamental policy shift: rather than allowing the industry to coordinate production cuts, the government is using technical benchmarks — energy consumption limits, minimum efficiency requirements, safety specifications, and nameplate accuracy rules — to force market consolidation. This approach is seen as more legally defensible and market-compatible than direct production caps.

What the New Standards Entail

As reported by Caixin, the stricter requirements aim to “ease a severe supply glut that has hammered solar panel prices for more than three years.” Solar module prices currently hover near production costs at 0.7 yuan per watt, while wafer prices have fallen below costs.

These new standards build on earlier regulatory groundwork. On May 25, 2026, China’s State Administration for Market Regulation approved two mandatory national standards — “Safety Requirements for Photovoltaic Modules” and “Requirements for Nameplate Labeling of Photovoltaic Modules” — effective June 1, 2027. As reported by Xinhua via CE.cn, Yu Xiuming, Deputy Director of the China Electronics Standardization Institute, stated that these standards “can effectively reduce accident risks, ensure nameplate information is authentic and verifiable, and resolutely prevent artificial power ‘false labeling.’”

The “30% Elimination” Question

Market rumors that the new standards could eliminate 30% of solar capacity have circulated since June 2026, triggering stock rallies. According to analysis from Gelonghui, this figure appears to originate from Silicon Industry Association estimates that tightening polysilicon energy consumption standards could render approximately 31.4% of installed polysilicon capacity non-compliant. However, analysts caution that this figure applies specifically to polysilicon, not the entire supply chain, and refers to installed capacity rather than actual production.

Industry Reactions and Outlook

Reactions from industry insiders have been mixed. Liu Yiyang, Executive Secretary-General of the China Photovoltaic Industry Association (CPIA), noted via Xinhua that the mandatory national standards are “fully benchmarked against international advanced levels” and will promote China’s PV standards to “go global.”

However, some executives remain skeptical. An anonymous TOPCon equipment company executive told Gelonghui: “Leading companies like Tongwei and Trina have already upgraded to improve efficiency. The purpose is capacity clearance. The key is that companies have no money now, and the government has no money to support enterprise transformation.”

Zheng Tianhong, an SMM solar analyst, commented that while the new standards support ending excessive competition, supply-demand may not improve immediately. Leading manufacturers alone can meet current demand, suggesting that eliminating marginal capacity alone may not be sufficient to rebalance the market.

What to Watch For

The coming months will reveal whether technical standards alone can achieve what market coordination could not. Key questions include whether the standards will include specific minimum module efficiency thresholds, how enforcement will work across China’s diverse provincial regulatory landscape, and whether smaller, financially weaker companies can fund the technology upgrades needed to comply.

If successful, the standards could lead to higher global solar module prices in the short term, potentially slowing renewable energy deployment in price-sensitive markets while improving long-term product reliability. China’s shift from “scale leadership” to “value leadership” in solar manufacturing may reshape global supply chains — raising prices for international buyers but delivering higher-quality products in return.

In the meantime, the industry’s path to recovery remains uncertain. As one industry executive bluntly put it: “If you really want a prescription, it’s for the banks to pull the plug.” Whether Beijing is willing to let that happen may determine the fate of the world’s most important solar manufacturing hub.