Applications of SPC Photovoltaic Grade EVA in Industrial Manufacturing

SPC photovoltaic grade EVA plays a critical materials engineering role across photovoltaic module assembly and specific specialty film processing chains. As a primary manufacturer, we focus exclusively on validated industrial use-cases that require rigorous consistency, traceability, and downstream compatibility from source polymer through to end-user product performance.

1. Encapsulation Film for Photovoltaic (PV) Solar Modules

EVA resin formulated for encapsulation film production addresses strict durability, optical clarity, and bonding requirements demanded by crystalline silicon and thin-film solar module production lines. Its crosslinking capability and optimized melt flow ensure film stability during lamination while prolonging service life under field conditions.

Industry compliance standards

• IEC 61215 (Crystalline Silicon Terrestrial PV Modules – Design Qualification and Type Approval)
• UL 1703 (Standard for Flat-Plate Photovoltaic Modules and Panels)
• IEC 61730 (Photovoltaic (PV) Module Safety Qualification)
• REACH/SVHC conformity for material composition

Typical usage ratio

• 68-72 wt% of encapsulation film formulation, with precise adjustment depending on cell type, film thickness (0.3-0.5 mm), and compatibility with co-extruded stabilizers or UV absorbers

Downstream process integration

• Primary step: resin blending and pellet extrusion
• Secondary step: cast film extrusion and calendaring, slitting into solar-encapsulation rolls
• Module assembly: vacuum lamination process integrating glass, EVA encapsulant, and solar cells under controlled temperature and pressure
• Crosslinking/cure: in-situ thermal network formation under lamination conditions

Final product types

• Photovoltaic encapsulation film (clear, white, or black)
• Field-deployed PV module panels (residential, commercial, utility-scale)
• Building Integrated Photovoltaics (BIPV) glass laminates

2. Backsheet Adhesive Layer for PV Modules

EVA serves as the internal adhesive tie-layer for multi-layered PV backsheet laminates. This unique application uses the polymer’s thermal fusion and chemical stability to bond PVF, PET, or polyamide layers, maintaining mechanical integrity and electrical isolation through decades of outdoor exposure.

Industry compliance standards

• TÜV Rheinland 2PfG 1169/08.2007 (Requirements for backsheets in photovoltaic modules)
• UL 1703 for module-level safety validation
• RoHS Directive 2011/65/EU compliance
• ISO 9001 quality management for consistent backsheet production

Typical usage ratio

• 12-18 wt% as middle tie-layer within three- or five-layer backsheet laminates, with adjustment for thicknesses (30-45μm) and adhesion to adjacent functional films

Downstream process integration

• Film extrusion or solvent-based coating of EVA onto PET or polyamide core
• Continuous lamination with surfacing fluoropolymer (PVF or PVDF), curing at elevated pressure and temperature
• Sheeting and precision die-cutting prior to PV module assembly

Final product types

• PET-based multi-layer PV module backsheets
• PVDF-coated backsheets for enhanced weatherability

3. Glass-Glass Lamination in High-Durability Solar Panels

In glass-glass PV module designs, EVA film acts as an interlayer with superior resistance against moisture ingress and UV-induced degradation. This application leverages the polymer’s compatibility with high-temperatures and capability to wet both float glass and top-layer solar cells during the lamination process, resulting in significant lifespan extension of PV installations for harsh climate deployments.

Industry compliance standards

• IEC 61215 and IEC 61730 for glass-glass module assembly validation
• IEC 60068 environmental stress test standards
• UL 61730-1 for safety and long-term durability
• ASTM E2188 (Moisture Ingress Testing for Building Materials)

Typical usage ratio

• 75-80 wt% in the encapsulant interlayer, with thickness selected between 0.4-0.5 mm for mechanical stability and light transmission

Downstream process integration

• Custom extrusion of EVA sheet to fit glass size and desired thickness
• Pre-lamination stack assembly (glass/EVA/cell/EVA/glass)
• Thermal vacuum lamination for complete interfacial fusion and void minimization
• Edge sealing and post-cure quality test

Final product types

• High-output bifacial PV modules
• Double-glazed BIPV panels
• Specialized agrivoltaic glass-glass modules for greenhouse integration

4. Thermoformable Solar Ribbon Insulation Coating

Cable and tabbing ribbon manufacturers in solar cell applications utilize EVA resin as an insulation and protective coating layer. The material’s melt stability allows for uniform encapsulation of copper or tinned-copper strips, providing electrical isolation and mechanical protection during module lamination and service life, especially in high-temperature or high-humidity environments.

Industry compliance standards

• IEC 60228 (Conductors of Insulated Cables)
• EN 50618:2014 (Cables for PV Systems)
• UL 4703 (Photovoltaic Wire Standard)
• ISO 6722-1 Automotive wire safety (as relevant for solar car module interconnects)

Typical usage ratio

• Coating thickness 80-180 μm equates to roughly 9-14 wt% over base metal ribbons, with precision micro-extrusion enabling tight control based on conductor dimensions

Downstream process integration

• Direct hot-melt extrusion of EVA over continuous-running copper ribbon or wire
• Inline cooling and surface finishing for controlled dielectric properties
• Coated ribbons fed into automated photovoltaic cell interconnection lines

Final product types

• Insulated solar cell tabbing ribbons
• PV module busbars with EVA coating
• Pre-insulated jumper wires or flat conductors for flexible solar devices

5. Specialty Films for Transparent BIPV Glazing Units

EVA resin is engineered into ultra-clear, non-yellowing specialty films used in building-integrated photovoltaic (BIPV) glazing, curtain wall façades, and skylight modules. This application depends on optical purity, low shrinkage, and fill-forming characteristics to maintain vision quality and consistent solar transmittance through architectural glass units while integrating discrete PV cells.

Industry compliance standards

• EN ISO 12543 (Laminated Glass and Laminated Safety Glass)
• EN 50583 (Photovoltaics in Buildings)
• ASTM E1300 (Design of Glazing for Buildings)
• National building code requirements for safety and fire-retardancy

Typical usage ratio

• 62-70 wt% as functional layer within multi-layer glass/PV/EVA assemblies, with selection based on panel optical clarity and thickness targets (0.3-0.45 mm)

Downstream process integration

• Solvent-free cast film extrusion using high-purity EVA pellets
• Cut-to-size lamination with IGU lines and automated cell placement
• Autoclave curing for enhanced optical bond and safety performance

Final product types

• Transparent BIPV glass façade units
• Energy-generating curtain wall panels
• Architectural rooflights and canopy glazing with embedded PV