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Influence of Lamination Conditions of EVA Encapsulation on Photovoltaic Module Durability
Dan Wu1, Patrick Wessel2,3, Jiang Zhu1,4
1Centre for Renewable Energy Systems Technology (CREST), School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough LE11 3TU, UK.
Materials (Basel, Switzerland)
|November 14, 2023
Summary
Optimizing the lamination process for Photovoltaics (PV) modules is crucial for durability. This study found that the encapsulant
Area of Science:
- Materials Science
- Renewable Energy Engineering
Background:
- Encapsulation significantly impacts Photovoltaics (PV) module durability.
- The relationship between lamination processes and PV module longevity requires further investigation.
Purpose of the Study:
- To investigate the effects of lamination parameters on encapsulant stability under stress testing.
- To evaluate lamination stability using multiple indicators for both production quality and long-term performance.
Main Methods:
- Assessed ethylene-vinyl acetate copolymer (EVA) curing level, void formation, chemical and optical stability, and adhesion strength.
- Examined the influence of EVA curing on other stability properties.
- Identified optimal gel content ranges for enhanced laminate stability.
Main Results:
- Laminate stability generally increases with EVA curing level up to an optimal point.
- Excessive curing (>92% gel content) leads to voids, yellowing, and reduced adhesion.
- Insufficient curing (<70% gel content) results in poor stability and EVA flowing.
- The optimal gel content range for tested materials is 84-90%.
Conclusions:
- EVA curing level is a critical factor in PV module encapsulant stability.
- There is an optimal range for EVA gel content (84-90%) to maximize PV module durability.
- Controlling lamination parameters, particularly EVA curing, is essential for reliable PV module performance.
