EVA encapsulant film for solar modules, plus POE and EPE options: anti-PID, UV-resistant and compatible with TOPCon and PERC lines, in your thickness.
EVA Encapsulant Film: over 80 N/cm Peel to Glass
EVA encapsulant film for solar modules, plus POE and EPE options: anti-PID, UV-resistant and compatible with TOPCon and PERC lines, in your thickness.
Product Introduction
Encapsulant and cover glass are specified together in practice; the glass side of that pairing is covered in why solar panel glass is textured.
EVA (Ethylene Vinyl Acetate) encapsulant film is the cornerstone material in photovoltaic module manufacturing, serving as a high-performance thermoplastic adhesive that transforms from a solid, non-tacky film at room temperature into a permanent bonding agent during the lamination process. This sophisticated material acts as both a transparent protective layer and a structural adhesive, engineered to safeguard solar cells for over 25 years while maintaining optimal light transmission.
Ooitech, as a leading provider of solar panel production line equipment and materials, offers comprehensive encapsulant film solutions including traditional EVA, advanced POE (Polyolefin Elastomer), and innovative EPE (co-extruded EVA-POE-EVA) films. These materials are specifically designed to work seamlessly with our complete range of production equipment, from solar cell tabber stringers to laminators, ensuring perfect integration in your manufacturing process.
The encapsulant film performs multiple critical functions: providing robust adhesion between glass, cells, and backsheet; offering physical protection against mechanical stress; maintaining high optical transmittance for maximum energy conversion; ensuring electrical insulation for safety; and creating an environmental barrier against moisture and contaminants. Whether you're producing G1, M6, M10, or M12 modules, or working with advanced cell technologies like PERC, TOPCon, HJT, or ABC/HPBC, selecting the right encapsulant is crucial for module performance and longevity.
Technical Specifications
EVA Film Specifications
| Parameter | Standard Value | Premium Grade | Test Method |
|---|---|---|---|
| Light Transmittance | >91% | >92% | ASTM D1003 |
| Gel Content (after curing) | 75-85% | 80-90% | ASTM D2765 |
| Peel Strength to Glass | >80 N/cm | >100 N/cm | ISO 11339 |
| Peel Strength to Backsheet | >60 N/cm | >80 N/cm | ISO 11339 |
| Volume Resistivity | >10¹⁴ Ω·cm | >10¹⁵ Ω·cm | ASTM D257 |
| Water Vapor Transmission Rate | 30-40 g/m²/day | 25-35 g/m²/day | ASTM F1249 |
| UV Cut-off Wavelength | 360 nm | 380 nm | UV-Vis Spectroscopy |
| Operating Temperature | -40°C to +85°C | -40°C to +90°C | IEC 61215 |
| Thickness Options | 0.45mm, 0.50mm | 0.45mm, 0.50mm, 0.60mm | Micrometer |
| Sheet Width | 980-2000mm | Customizable | - |
POE Film Specifications
| Parameter | Standard Value | Premium Grade | Test Method |
|---|---|---|---|
| Light Transmittance | >91% | >92% | ASTM D1003 |
| Water Vapor Transmission Rate | <5 g/m²/day | <3 g/m²/day | ASTM F1249 |
| Volume Resistivity | >10¹⁵ Ω·cm | >10¹⁶ Ω·cm | ASTM D257 |
| Peel Strength to Glass | >100 N/cm | >120 N/cm | ISO 11339 |
| Anti-PID Performance | Excellent | Superior | IEC TS 62804 |
| Processing Temperature | 145-155°C | 145-155°C | DSC Analysis |
| Acid-free Composition | Yes | Yes | Chemical Analysis |
| Thickness Options | 0.45mm, 0.50mm | 0.45mm, 0.50mm, 0.60mm | Micrometer |
EPE Film Specifications
| Parameter | Standard Value | Premium Grade | Test Method |
|---|---|---|---|
| Structure | EVA-POE-EVA | EVA-POE-EVA | Cross-section Analysis |
| Light Transmittance | >91% | >92% | ASTM D1003 |
| Water Vapor Transmission Rate | 8-15 g/m²/day | 5-10 g/m²/day | ASTM F1249 |
| Peel Strength to Glass | >90 N/cm | >110 N/cm | ISO 11339 |
| Anti-PID Performance | Very Good | Excellent | IEC TS 62804 |
| Cost-Performance Ratio | Excellent | Excellent | Market Analysis |
| Processing Window | Wide | Wide | Process Validation |
Technical Advantages
Superior Optical Performance
- Maximum Light Transmission: All our encapsulant films achieve >91% light transmittance, with premium grades exceeding 92%, ensuring minimal power loss from optical absorption
- UV Stability: Advanced UV stabilizers prevent yellowing and maintain transparency throughout the 25+ year module lifetime
- Refractive Index Matching: Optimized refractive index minimizes reflection losses at material interfaces
Enhanced Durability & Reliability
- Weather Resistance: Exceptional performance in damp heat (85°C/85% RH), thermal cycling (-40°C to +85°C), and humidity freeze tests
- Anti-PID Technology: POE and EPE films provide superior resistance to Potential Induced Degradation, critical for large-scale installations
- Chemical Stability: POE films eliminate acetic acid generation, protecting sensitive n-type cells and metallization
Optimized Processing Characteristics
- Wide Processing Window: EPE films combine EVA's easy processing with POE's superior properties
- Fast Cure Kinetics: Reduced lamination cycle times increase production throughput
- Excellent Adhesion: Strong bonding to glass, cells, and various backsheet materials without primers
Compatibility with Advanced Technologies
- N-type Cell Compatible: POE and EPE films ideal for TOPCon, HJT, and IBC technologies
- Bifacial Module Support: Low WVTR prevents moisture ingress from both sides
- Shingled Cell Design: Excellent gap-filling properties for shingled module architectures
- Compatible with Ooitech Equipment: Optimized for use with our laminators, EL testers, and complete production lines
Product Applications
Module Type Applications
Crystalline Silicon Modules
- PERC modules: EVA remains the cost-effective standard for p-type PERC cells
- TOPCon modules: POE or EPE recommended for enhanced reliability with n-type cells
- HJT modules: POE essential due to temperature sensitivity and anti-PID requirements
- IBC/ABC/HPBC modules: Premium POE for maximum efficiency preservation
Specialized Module Designs
- Bifacial modules: POE or EPE for superior moisture resistance on both surfaces
- Shingled modules: Materials with excellent flow properties for complete encapsulation
- Flexible modules: Special formulations for mechanical flexibility
- Building-integrated PV (BIPV): Aesthetic grades with enhanced clarity
Production Line Integration
Pre-Lamination Equipment Compatibility
- Solar cell tabber stringers: Material handling considerations for automated layup
- Layup stations: Film cutting and positioning systems optimized for different thicknesses
- Bussing machines: Compatible with various interconnection technologies
Lamination Process Integration
- Works seamlessly with Ooitech laminators for optimal cure profiles
- Compatible with both single and double-chamber lamination systems
- Supports fast-cure formulations for increased throughput
Quality Control Applications
- EL testing: Transparent to electroluminescence wavelengths for defect detection
- IV testing: Maintains electrical properties for accurate power measurements
- Sun simulator testing: Stable under high-intensity illumination
Industry Sector Applications
Utility-Scale Solar Farms
- Anti-PID films for large string voltages
- Enhanced durability for 25-30 year warranties
- Cost-optimized solutions for GW-scale production
Commercial & Industrial Rooftops
- High-efficiency encapsulants for space-constrained installations
- Fire-resistant grades for building codes compliance
- Long-term reliability for investment protection
Residential Solar Systems
- Aesthetic considerations with clear, non-yellowing materials
- Enhanced safety features for roof-mounted systems
- Compatible with module-level power electronics
Contact for Purchase
Get Expert Consultation from Ooitech
As your comprehensive solar panel production line partner, Ooitech provides not just encapsulant films but complete manufacturing solutions. Our expertise spans from 5MW to 1GW production capacities, covering all aspects of module manufacturing including materials, equipment, training, and after-sales service.
Why Choose Ooitech for Your Encapsulant Needs:
- Integrated supply of production equipment and materials
- Technical expertise in G1, M6, M10, M12 module formats
- Support for all cell technologies: PERC, TOPCon, HJT, IBC, ABC, HPBC
- Comprehensive training on material handling and process optimization
- Global delivery and local technical support
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Contact Our Technical Sales Team:
Email: info@ooitech.com Phone: +86 18571646990 WhatsApp: +86 15961592660 Head Office: Wuhan Yangtze River Center, Wuhan, China Website: www.ooitech.com
Request a Quote Today!Whether you need EVA, POE, or EPE encapsulant films, or a complete solar panel production line solution, our team is ready to provide tailored recommendations based on your specific production requirements. Contact us for:
- Material samples and technical datasheets
- Compatibility analysis with your current equipment
- Process optimization consultation
- Bulk pricing and delivery schedules
- Complete production line packages
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