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Composition and structure of solar panel

Edit: DS New Energy    Date: Aug 02, 2018

1 tempered glass Its role is to protect the power generation of the main body (such as batteries), light transmission of its selection is required.

(1). transmittance must be high (generally more than 91%); 

(2). Ultra-Stainless steel treatment .


2 Eva used to bond fixed tempered glass and power generation body (such as battery), transparent EVA material directly affects the life of components, exposed to the air of EVA easy aging yellowing, which affects the light transmittance of components, which affect the quality of the components of the power generation in addition to the quality of Eva itself.

Component manufacturers of the laminating process is also very large, such as the EVA adhesive not standard, Eva and tempered glass, back plate adhesion strength is not enough, will cause premature aging of Eva, affecting the life of components. 


3 The main function of the battery is power generation, the main market of power generation is crystalline silicon solar cells, thin film solar cells, both have advantages and disadvantages. Crystalline silicon solar cells, equipment costs relatively low, but the consumption and the cost of the battery is high, but the photoelectric conversion efficiency is also high, in the outdoor sunlight power generation is more appropriate; 

Thin film solar cells, relatively high cost of equipment, but consumption and battery cost is very low, but the photoelectric conversion efficiency relative to the crystal silicon battery more than half point, but the weak, it can also generate electricity in ordinary light, such as a solar cell on a calculator.


4 Eva function as above, main bonding and packaging power generation body and back plate.


5 backplane function, sealing, insulation, waterproof (generally used tpt, TPE and other materials must be resistant to aging, most of the component manufacturers are guaranteed 25, tempered glass, aluminum alloy generally no problem, the key in the backplane and silicone can meet the requirements.)


6 Aluminum alloy protection layer pressure, to play a certain role in sealing, supporting .


7 The junction box protects the whole power generation system, plays the role of the current transfer station, if the component short-circuit junction box automatically disconnects the short circuit battery string, preventing the whole system from being burnt.

The key to the junction box is the choice of diodes, depending on the type of battery in the module, the corresponding diodes are different .


8 Silica gel seals, used to seal components and aluminum alloy frame, components and junction boxes.

Some companies use double-sided tape, foam to replace silica gel, the domestic general use of silica gel, the process is simple, convenient, easy to operate, and the cost is very low.


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