(1) toughened glass: its role is to protect the power generation subject (such as battery), the selection of light transmission is required:
1. Light transmittance must be high (generally more than 91%); 2. Ultra-white tempering treatment.

(2) EVA: Used to bond fixed toughened glass and power generation body (battery), the quality of transparent EVA material directly affects the life of the component, EVA exposed to the air is easy to age and yellow, thus affecting the transmittance of the component, thus affecting the power generation quality of the component in addition to the quality of EVA itself, the lamination process of the component manufacturer is also very important. Such as EVA glue connection is not up to standard, EVA and toughened glass, backplane bonding strength is not enough, will cause EVA early aging, affect the life of components.

(3) Battery: the main role is to generate electricity, the main power generation market is the mainstream of crystalline silicon solar cells, thin film solar cells, both have their own advantages and disadvantages.
Crystalline silicon solar cell, equipment cost is relatively low, but the consumption and the cost of the battery are high, but the photoelectric conversion efficiency is also high, and it is suitable to generate electricity in outdoor sunlight.
Thin film solar cell, relative equipment cost is higher, but the consumption and battery cost is very low, but the photoelectric conversion efficiency is relative to the crystal silicon cell more than half, but the low light effect is very good, in the ordinary light can also generate electricity, such as solar cells on the calculator.

(4) backplane: function, seal, insulation, waterproof. Generally, materials such as TPT and TPE must be resistant to aging. Most component manufacturers have a warranty of 25 years, tempered glass and aluminum alloy are generally no problem. The key is whether the backplane and silica gel can meet the requirements.

(5) Aluminum alloy: protective laminated parts, play a certain role in sealing and supporting.

(6) Junction box: protect the entire power generation system, play the role of current transfer station, if the component short circuit junction box automatically disconnect short circuit battery string, prevent burn out of the whole system junction box is the most critical choice of diode, according to the type of battery in the component is different, the corresponding diode is not the same.

(7) Silica gel: sealing function, used to seal components and aluminum alloy frame, components and junction box junction some companies use double-sided adhesive strip, foam to replace silica gel, widely used in China, the process is simple, convenient, easy to operate, and the cost is very low.