As solar energy is a kind of clean energy, its application is growing rapidly worldwide, the use of sunlight power generation is a way to use solar energy, solar panels came into being, solar panels are through the photoelectric effect or photochemical effect directly into the light energy into electrical energy device, as long as the light is illuminated, instant output voltage and current.
Solar Panel PrincipleA solar panel is a solar panel composed of one or more solar panels. Solar panels are a kind of semiconductor devices with the characteristics of converting light into electricity, which can convert the solar radiation energy irradiated on its surface into direct current. Solar panels are the most basic components of photovoltaic power generation systems/products, and are also the core parts of solar photovoltaic power generation systems. Its biggest role is to convert solar energy into electricity and store it in the battery.
Solar Panel Composition and Function Of Each Part
- Tempered glass: its role is to protect the main power generation (such as battery), the selection of light transmission is required: the light transmission rate must be high (generally more than 91%); Super white tempering treatment.
- EVA: Used to bond and fix the tempered 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 yellow, thus affecting the light transmission 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 large. If EVA adhesive connection is not up to standard, EVA and tempered glass, backplane bonding strength is not enough, will cause early aging of EVA, affecting the life of the component.
- Battery: the main role is to generate electricity, the main market of power generation is the mainstream of crystalline silicon solar cells, thin film solar cells, both have advantages and disadvantages. Crystalline silicon solar cells, the equipment cost is relatively low, but the consumption and battery costs are high, but the photoelectric conversion efficiency is also high, and it is more suitable to generate electricity in outdoor sunlight. Thin film solar cells, the relative equipment cost is high, but the consumption and battery cost is very low, but the photoelectric conversion efficiency is more than half of the crystalline silicon cell, but the weak light effect is very good, and it can also generate electricity under ordinary light, such as the solar cell on the calculator.
- Backplane: function, sealing, insulation, waterproof. Generally, TPT, TPE and other materials must be resistant to aging, most component manufacturers are guaranteed for 25 years, tempered glass, aluminum alloy is generally no problem, the key is whether the backplane and silicone can meet the requirements.
- Aluminum alloy: protective laminate, plays a certain sealing, supporting role.
- junction box: protect the entire power generation system, play the role of current transfer station, if the component short-circuit junction box automatically disconnect the short-circuit battery string, to prevent burning the entire system junction box is the most critical selection of diodes, according to the type of battery in the component, the corresponding diode is not the same.
- Silicone: sealing effect, used to seal components and aluminum alloy frame, components and junction box junction some companies use double-sided tape, foam to replace silicone, the domestic common use of silicone, simple process, convenient, easy to operate, and the cost is very low.
