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With the rapid development of the photovoltaic industry, the application of ETFE solar panel surface encapsulation is one of the most promising application directions in recent years. Compared with most photovoltaic backsheets on the market that use PVDF and PVF as the outer fluorine film, ETFE solar panel has better weather resistance, heat resistance, scratch resistance and hydrophobicity, and is a more ideal photovoltaic backsheet material .

ETFE solar panel is a fluororesin produced by alternating copolymerization of ethylene and tetrafluoroethylene, and is the strongest fluoroplastic. ETFE film has the following characteristics: 1. The unique self-cleaning surface of ETFE film makes it highly anti-fouling and easy to clean. Usually, rainwater can remove the main dirt. 2. ETFE film has the characteristics of anti-aging, corrosion resistance and long life. The general service life is 25-35 years. 3. The ETFE film is light in weight, high in fire resistance, and will not drip when burning. 4. The light transmittance of ETFE film is high, and the light transmittance of ETFE film can reach more than 90%. 5. Environmentally friendly and recyclable, ETFE film can be recycled and reused to produce other ETFE products.

ETFE solar panel has been applied to flexible photovoltaic cell packaging materials in the domestic photovoltaic cell industry. It gets rid of tempered glass and makes the module consist of five layers: upper ETFE film, EVA layer, cell layer, EVA layer and lower ETFE layer. The thickness of the battery sheet is only less than 1mm, and because it is completely made of plastic, its weight is only 1kg/m2, which truly realizes flexibility and portability.

With the rapid increase of newly installed photovoltaic capacity in the world, the potential application prospect of ETFE solar panel is very broad. As an ideal packaging material for flexible photovoltaic cells, ETFE film can get rid of tempered glass and truly realize flexibility and portability. In the future, flexible solar panels are expected to be rapidly applied in many scenarios that have high requirements for lightweight, portability and applicability, such as aerospace, solar cars, solar sailing, outdoor activities and disaster emergency, allowing solar energy to be made into arbitrary shapes and It is possible to attach to the surface of any object, which is a new technological revolution.