The photovoltaic junction box is the connector between the solar cell panel (module array) and the solar charging control device. The main function is to connect the power generated by the solar cell with the external circuit. It is divided into crystalline silicon junction box, amorphous silicon junction box and curtain wall junction box, which are composed of box body, cable and connector.

Functions of photovoltaic junction box

The photovoltaic module junction box is mainly composed of junction box and connector. Its main function is to connect and protect the solar photovoltaic module, and conduct the current generated by the photovoltaic module for use by users. The junction box shall form a closed space with the wiring system. The junction box provides protection against environmental impact for the conductor and its connection, provides protection for the contact of live parts, and reduces the tension of the wiring system connected with it. The additional function is to protect the outgoing line of the component and prevent the hot spot effect.

Certification of photovoltaic junction box

Adhering to providing users with safe, fast and reliable connection solutions, products must pass TUV, IEC certification and national certification. At present, the quality assessment of photovoltaic junction box products comes from TUV, UL certification, etc. All the major junction box manufacturers in China are also committed to developing junction boxes that provide users with safer, faster and reliable connection solutions, and are also working hard to ensure that their products can pass TUV, UL and other certification.

Characteristics of photovoltaic junction box

1. The shell is made of imported high-grade raw materials, with high anti-aging and UV resistance;

2. It is suitable for outdoor production under harsh environmental conditions, with an effective use of more than 30 years;

3. 2-6 wiring terminals can be built in as required;

4. All connection methods shall be quick connect plug-in connection.

Function of photovoltaic junction box

The junction box is used to connect the battery array and the charging control device. Therefore, generally speaking, it needs to be exposed to the outdoors and be subject to various environmental changes. In addition, the electronic components of the junction box will generate heat, so a great pressure difference will be generated inside and outside the junction box. The influence of weather will intensify the change of internal and external pressure difference. It is necessary to communicate with the atmosphere to balance the internal and external pressure difference to prevent the performance of the internal electronic components and the sealing performance of the junction box from being affected. At the same time, it is necessary to block solid and liquid pollutants such as water and dust from the external environment.

1. Enhance the security of components

2. Sealing assembly current output part (lead part)

3. Make the use of components more convenient and reliable

Selection of photovoltaic junction box

The selection of the photovoltaic junction box mainly depends on the current of the module. One is the maximum working current and the other is the short-circuit current. Of course, the maximum current that the module can output when the short-circuit current is calculated. The rated current of the junction box calculated according to the short-circuit current should have a relatively large safety factor. If the junction box is calculated according to the maximum working current, the safety factor is a little smaller.

Dongguan Sanyou photovoltaic Co., Ltd. and Hong Kong Sanyu Energy Co., Ltd. are new energy enterprises. They are located at No. 102, Min'an Road, Daning Town, Humen Town, the Pearl River Delta. It is adjacent to the Chang'an exit of Coastal Expressway and Guangzhou Shenzhen Expressway. It is adjacent to Guangzhou in the north and Shenzhen in the south. It has convenient transportation and unique geographical advantages.

Since 2006, the company has been committed to the R & D, production and sales of solar photovoltaic connectors, photovoltaic junction boxes, photovoltaic wires and photovoltaic connection modules, which are widely used in photovoltaic power stations, grid connected power generation, off grid power generation, roof systems, household power supply systems, solar mobile power supplies, solar cell phone batteries, communication power supplies and solar lamps (street lamps, lawn lamps, courtyard lamps and traffic signal lamps). Solar energy construction and other fields

Provide customers with high-quality IT products and services.

With excellent quality, the company's products have successfully passed the certification of TUV Rhineland, UL, CE & RoHS and other international authorities. The solar connector has obtained the national utility model patent ZL 2012 2 0008007.4. It is a domestic manufacturer of IP68 connectors. It has been successfully sold to Europe, America, Australia and other markets, and has helped to establish a number of national power stations. It is known as the European solar power station, which is worth recommending. First, it has established a good strategic partnership with customers around the world to provide perfect sales services for customers around the world.

Relying on independent R & D capability, strict testing standards, perfect testing system, modern management mode and excellent elite team, adhering to the purpose of "survival by quality and development by innovation", the company takes the road of specialization, scale and internationalization, and is determined to build Sunyo into a world-class solar PV brand.