As the peak installation season for photovoltaics (PV) in 2026 gets underway, the solar panel mid clamp—a seemingly small but critical component of PV mounting systems—is experiencing a dual surge in technological iteration and market demand. From recently granted patents by the China National Intellectual Property Administration to material procurement for large-scale央企 (centrally state-owned enterprise) projects, this niche sector is showing significant dynamism.

Technological Innovation: Focus on “Anti-Loosening” and High Stability

PV power plants are exposed to outdoor conditions for long periods; wind-induced vibration and temperature fluctuations can cause bolt loosening, a major safety hazard for the system. Addressing this pain point, Kasi (Xiamen) Energy Technology Co., Ltd. obtained a utility model patent titled “Mid Clamp” (Authorization Announcement No. CN223771970U) in January 2026.

The patented technology incorporates a self-resetting positioning plate at the top of the fastening bolt, combined with a reinforcing column for dual retention, effectively solving the problem of traditional mid clamps loosening over time due to vibration. This design significantly enhances the stability and safety of PV module frames, reflecting the industry’s shift from a sole focus on installation efficiency toward a strategy that balances “efficiency with long-term safety.”

Market Demand: Utility-Scale and Distributed Projects Both Drive Growth

On the application side, as a core connecting component of PV mounting systems, demand for mid clamps continues to expand with the rollout of large-scale base projects and distributed PV installations.

Utility-Scale Power Plants: China Energy Engineering Group recently released a procurement notice for clamps for the “Three Gorges Yunnan Nengtou Qiaojia County Lvyintang 150MW PV Power Generation Project.” As a representative large-scale ground‑mounted plant, the project specified procurement requirements for mid clamps, end clamps, and associated mounting bolts, highlighting the reliance of large centralized projects on standardized, high-volume supply of fasteners.

Distributed PV and BIPV: Distributed PV projects impose higher demands on the lightweight nature and compatibility of mid clamps. In the 5.62 MW distributed PV project at the Xiamen Xiang’an New Production Base, the purchaser not only defined the quantity of mid clamps required but also specified leading brands such as Arctech, Xiamen Kesheng, and Akcome, emphasizing that the clamps must be compatible with the specific standing seam metal roof profiles. In addition, aluminum alloy waterproof rails and mid clamps are becoming standard in distributed rooftop installations due to their lightweight and corrosion-resistant properties.

Material Trends: Aluminum Alloy Dominates, Emphasizing Weather Resistance and Light Weight

According to recent procurement announcements and technical documents, aluminum alloy has become the mainstream material for PV mid clamps. Compared to traditional steel, aluminum alloy mid clamps offer several significant advantages:

Lightweight: With a density only one-third that of steel, they significantly reduce roof loads and transportation/installation costs.

Corrosion Resistance: An anodized surface treatment effectively resists salt spray and high-humidity environments, making them particularly suitable for coastal and humid regions.

Electrical Conductivity: Good electrical conductivity facilitates system grounding, enhancing the overall electrical safety of the power plant.

Industry Outlook: Circular Economy and Recycling Technologies Attract Attention

With the approaching wave of retired PV modules, the industry chain is increasingly focusing on end-of-life PV system recycling. In February 2026, a wholly-owned subsidiary of Tunghsu (000591) was shortlisted for a major environmental protection technology equipment innovation initiative by the Ministry of Industry and Information Technology. Its focus area is the “green and efficient separation of PV module laminates: complete sets of technologies and equipment.” This development signals that in the future, PV mounting systems, including mid clamps, will be designed with greater emphasis on ease of disassembly and recyclability to align with green manufacturing and circular economy principles.

Conclusion

The humble mid clamp offers a glimpse into the PV industry’s transition from extensive growth to a more refined, quality-driven development model. Supported by anti-loosening patented technologies, tested in real-world applications in large-scale央企 (centrally state-owned enterprise) projects, and with the comprehensive adoption of aluminum alloy materials, the solar panel mid clamp niche is becoming a key factor in ensuring the stable operation of PV power plants over their “30-year lifecycle.”