The Global Photovoltaic Auxiliary Materials Market was valued at USD 32.8 Billion in 2025 and is projected to reach USD 58.4 Billion by 2034, growing at a Compound Annual Growth Rate (CAGR) of 7.8% during the forecast period (2024–2034). This robust growth is driven by global decarbonization mandates, unprecedented solar capacity expansion, and technological advancements in materials science aiming to enhance module efficiency, durability, and sustainability.

As the world accelerates its transition to renewable energy, the foundational components that make solar power possible are more critical than ever. In this blog, we profile the Top 10 Companies in the Photovoltaic Auxiliary Materials Industry—leading suppliers of encapsulants, backsheets, frames, and other vital materials that are building the backbone of the global solar ecosystem.

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🔟 1. 3M Company

Headquarters: Maplewood, Minnesota, USA
Key Offering: Encapsulation Films, Adhesives, Backsheet Components

3M is a global science-based company that provides critical materials for the PV industry, including high-performance encapsulant films and specialty adhesives. Their products are engineered to protect solar cells from environmental stressors, ensuring long-term performance and reliability.

Innovation Focus:

• Development of next-generation, durable backsheet solutions

• Advanced adhesive technologies for improved module assembly

• Commitment to sustainability through material science innovation

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9️⃣ 2. Dow Inc.

Headquarters: Midland, Michigan, USA
Key Offering: Polyolefin Elastomer (POE) Encapsulants, Silicone Materials

Dow is a premier materials science leader, supplying high-performance encapsulants like ENLIGHT™ Polyolefin Elastomer films. These materials are crucial for protecting photovoltaic cells against moisture, UV radiation, and thermal cycling, thereby extending module lifespan.

Innovation Focus:

• Pioneering POE encapsulants for superior PID resistance

• Expanding production capacity to meet soaring global demand

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8️⃣ 3. Jolywood (Suzhou) Sunwatt Co., Ltd.

Headquarters: Suzhou, Jiangsu, China
Key Offering: N-Type Bifacial Cells, Back Contact Materials, Backsheets

Jolywood is a vertically integrated PV manufacturer and a key supplier of advanced backsheets and materials for N-type bifacial modules. The company is renowned for its innovation in high-efficiency cell technology and the auxiliary materials that support it.

Innovation Focus:

• Leadership in N-type bifacial cell and module technology

• Development of transparent backsheets for bifacial gain

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7️⃣ 4. STR Holdings, Inc. (A Mitsui Chemicals Company)

Headquarters: Farmington, Connecticut, USA (Parent: Tokyo, Japan)
Key Offering: EVA (Ethylene Vinyl Acetate) Encapsulation Sheets

STR Holdings, now part of Mitsui Chemicals, is a leading global supplier of high-quality EVA encapsulant sheets. These sheets are essential for laminating and protecting solar cells, providing excellent adhesion, clarity, and long-term durability.

Innovation Focus:

• Producing ultra-clear, fast-curing EVA formulations

• Leveraging Mitsui’s global reach for supply chain resilience

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6️⃣ 5. Hangzhou First Applied Material Co., Ltd.

Headquarters: Hangzhou, Zhejiang, China
Key Offering: EVA & POE Encapsulant Films, Backsheets, Solar Adhesives

First Applied is one of the world’s largest manufacturers of PV encapsulation films and backsheet materials. The company serves major module producers globally with a comprehensive portfolio of high-performance, reliable products.

Innovation Focus:

• Extensive R&D in both EVA and POE encapsulant technologies

• Integrated production from raw materials to finished films

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5️⃣ 6. Cybrid Technologies Inc.

Headquarters: Suzhou, Jiangsu, China
Key Offering: Junction Boxes, Diodes, Connectors, Cable Assemblies

Cybrid Technologies is a leading specialist in PV junction boxes and interconnection components. Their products are critical for the electrical output, safety, and reliability of solar modules, managing current flow and providing bypass functions.

Innovation Focus:

• Developing smart junction boxes with monitoring capabilities

• Enhancing diode technology for higher current handling

Download FREE Sample Report:
Photovoltaic Auxiliary Materials Market – View in Detailed Research Report

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4️⃣ 7. Zhejiang Feiyue New Energy Co., Ltd.

Headquarters: Jiaxing, Zhejiang, China
Key Offering: Tinned Copper Ribbon, PV Ribbon, Interconnection Materials

Feiyue New Energy is a major global supplier of tinned copper interconnect ribbons, a fundamental material used to connect individual solar cells into a series circuit within a module. Their products are vital for electrical conductivity and mechanical strength.

Innovation Focus:

• Precision manufacturing of ultra-thin, high-conductivity ribbons

• Specialized coatings for low resistance and improved solderability

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3️⃣ 8. Coveme S.p.A.

Headquarters: San Lazzaro di Savena, Italy
Key Offering: PV Backsheets (TPT, KPK, TPE), Specialty Films

Coveme is a leading European manufacturer of high-performance laminated backsheets for solar modules. The company offers a wide range of backsheet structures designed to provide outstanding moisture barrier properties and weather resistance.

Innovation Focus:

• Focus on durable, halogen-free, and sustainable backsheet solutions

• Strong presence in the European market, supporting local PV manufacturing

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2️⃣ 9. Wacker Chemie AG

Headquarters: Munich, Germany
Key Offering: Silicone Encapsulants, Sealants, Adhesives

Wacker is a global chemical company providing high-quality silicone-based materials for PV applications. Their silicone encapsulants offer excellent UV stability and thermal performance, making them ideal for demanding environments and specialized modules.

Innovation Focus:

• Liquid silicone rubber encapsulants for bifacial and building-integrated photovoltaics (BIPV)

• R&D into silicone gels for enhanced module protection

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1️⃣ 10. TPI Composites (Specialized Materials Division)

Headquarters: Scottsdale, Arizona, USA
Key Offering: Composite Frames, Structural Components

While known for wind turbine blades, TPI Composites leverages its advanced composite expertise to develop lightweight, durable, and non-corrosive frames for solar modules. These innovative frames offer an alternative to traditional aluminum, reducing weight and lifecycle costs.

Innovation Focus:

• Developing carbon and glass fiber composite frames for reduced weight

• Exploring integrated mounting solutions for faster installation

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Photovoltaic Auxiliary Materials Market – View in Detailed Research Report

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🌞 Outlook: The Future of Photovoltaic Auxiliary Materials is Smarter and More Sustainable

The photovoltaic auxiliary materials market is at the forefront of enabling the global energy transition. As module technologies evolve towards higher efficiencies and longer lifetimes, the demand for advanced, reliable, and eco-friendly materials will intensify.

📈 Key Trends Shaping the Market:

• Shift from EVA to POE encapsulants for enhanced reliability in N-type and bifacial modules

• Development of transparent and conductive backsheets for bifacial applications

• Increasing use of lead-free soldering and halogen-free materials for sustainability

• Integration of smart features into junction boxes for module-level monitoring and optimization

Get Full Report Here:
Photovoltaic Auxiliary Materials Market – View in Detailed Research Report

The companies listed above are not only supplying essential components—they are actively engineering the future of solar energy through material innovation and technological advancement.