Solar cells, also known as "solar chips" or "photocells", are a photoelectric semiconductor sheet that uses sunlight to generate electricity directly. Individual solar cells cannot be used directly as power sources. As a power supply, several single solar cells must be connected in series, parallel and tightly packaged into modules.

Solar panels for caravans (also known as solar cell modules) A number of solar cells according to the assembly of the assembly, is the core part of the solar power system, but also the most important part of the solar power system.

Caravan solar panel power generation principle:

Solar power generation There are two ways of solar power generation, one is light-heat-electricity conversion mode, the other is light-electricity direct conversion mode:

The light-heat-electricity conversion method generates electricity by using the heat energy generated by solar radiation, which is generally converted by the solar collector into the steam of the working medium, and then drives the turbine to generate electricity. The former process is the light-heat conversion process; The latter process is the heat-electricity conversion process.

The photoelectric direct conversion method is to use the photoelectric effect to convert solar radiation directly into electrical energy, and the basic device of the photoelectric conversion is the solar cell. A solar cell is a device that converts solar energy directly into electrical energy due to the photovoltaic effect, and is a semiconductor photodiode. When the sun shines on the photodiode, the photodiode will turn the sun's light energy into electrical energy and generate current. When many cells are connected in series or in parallel, they can become a solar cell array with relatively large output power.

Caravan solar panel composition and function of each part

(1) tempered glass: its role is to protect the main body of power generation (such as battery), and the selection of light transmission is required:

1. Light transmittance must be high (generally more than 91%); 2. Super white tempering treatment.

(2) 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.

(3) Battery: the main role is to generate electricity, the mainstream of the main power generation market is 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 cells, but the weak light effect is very good, and it can also generate electricity under ordinary light, such as the solar cells on the calculator.

(4) 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.

(5) Aluminum alloy: protective laminate, plays a certain sealing, supporting role.

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

(7) silica gel: 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 use of silica gel, simple process, convenient, easy to operate, and the cost is very low.