EVA (Ethyl Vinyl Acetate) is a flexible and durable polymer material widely used in the manufacture of solar panels . EVA film is placed inside solar modules, around the photovoltaic (PV) cells, to provide mechanical stability and protection against external environmental influences.
The role of EVA in solar modules
Protection against external influences: The EVA layer protects the solar cells from moisture, UV radiation, mechanical damage and temperature fluctuations.
Mechanical stability: EVA fixes the photovoltaic cells, preventing them from shifting and ensuring that the module remains stable in the long term.
Optical transparency: The EVA layer is transparent, allowing sunlight to reach the photovoltaic cells unhindered, maximizing energy production.
Ensuring a long lifespan: The weather-resistant properties of EVA material increase the lifespan of solar modules, which is typically 25–30 years.
Characteristics of EVA
Heat resistance: EVA film is resistant to high temperatures, which is especially important due to the exposure of solar panels to intense sunlight.
UV resistance: EVA prevents the harmful effects of UV radiation, such as yellowing or material damage.
Moisture resistance: EVA protects solar panels from moisture and humidity, which can cause corrosion or malfunction.
Flexible structure: EVA provides adequate flexibility, which helps maintain the structural integrity of solar modules even under mechanical stress.
EVA in the solar panel manufacturing process
Layer placement: Two EVA layers are placed between the photovoltaic cells: one below the cells, one above them.
Lamination: During the production of solar panels, the EVA layer is laminated, which fixes the cells under the influence of heat and pressure, and the module is given a solid, airtight structure.
Testing: The quality of EVA is thoroughly tested to meet the requirements of long-term outdoor use.
Summary
EVA (ethyl vinyl acetate) is an essential material in the production of solar modules, providing protection, stability and long-term reliability for photovoltaic cells. The excellent properties of EVA, such as UV and moisture resistance, ensure that solar cells operate efficiently under a wide range of environmental conditions. The use of EVA contributes to the sustainability and economy of solar systems, supporting the spread of renewable energy sources worldwide.