The solar photovoltaic junction box is used as a connector of solar photovoltaic system components.

The main function of the solar photovoltaic junction box is to export the electrical energy generated by the solar cell module through the cable. Due to the special nature of the solar cell use occasion and its own expensive value.

Several main features of solar photovoltaic junction box:

(1) The shell has strong anti-aging and ultraviolet resistance capabilities;

(2) It meets the requirements for use under harsh outdoor environments;

(3) Excellent heat dissipation mode and reasonable internal cavity volume to effectively reduce the internal temperature to meet electrical safety requirements;

(4) Good waterproof and dustproof protection provides users with a safe connection scheme.

At present, the assessment of the quality of photovoltaic junction box products comes from TUV, UL certification, etc. The major domestic junction box manufacturers are also committed to developing junction boxes that provide users with safer, faster and more reliable connection solutions, and are also working hard for their products to pass TUV, UL and other certifications.

Dongguan SUNYO Photovoltaic Co., Ltd. is committed to the research and development and production of solar photovoltaic connectors, photovoltaic junction boxes, photovoltaic wires and photovoltaic connection components. It is widely used in photovoltaic power plants, grid-connected power generation, off-grid power generation, rooftop systems, home power supply systems, Solar mobile power, solar cell phone batteries, communication power, solar lamps (street lights, lawn lights, courtyard lights and traffic lights), solar buildings and other fields, and formed a one-stop service from product development, mold design, production to sales, Provide customers with high-quality products and high-quality services.

Analysis of advantages and disadvantages of different types of junction boxes.

Category 1: Traditional

Advantages: 

Clamping connection, fast operation and convenient maintenance.

Disadvantages: 

Due to the presence of electrical terminals, the junction box has a large volume and poor heat dissipation. The cable hole in the shell will cause the waterproof performance of the product to decrease. Wire contact connection, small conductive area, and reliable connection.

Improved solution:

1. The metal terminals with good heat dissipation are used to replace the electrical terminals, and the soldering connection method increases the contact area.

2. The "double insurance" fixed connection of clamping and screw is used to increase the reliability of the connection.

3. Add heat sink to improve heat dissipation performance.

4. Adopt high-density PCB welding method to reduce contact resistance.

The second category: compact sealant

Advantages: 

Due to the use of thin metal terminal soldering, the volume is small and compact, and it has better heat dissipation and stability. Because it is sealed with glue, it has better waterproof and dustproof performance. Provide a more flexible connection scheme, according to different needs can be sealed and unsealed two ways.

Disadvantages: 

Once problems occur after sealing, maintenance is not convenient.

The third category: special type for glass curtain wall

advantage:

Because it is used for low-power photovoltaic panels, the box is made more compact and will not affect the indoor lighting and aesthetics.

It is also a seal design, with good thermal conductivity, stability and waterproof and dustproof performance.

Disadvantages:

Due to the soldering connection, the cable wires extend into the box body through the outlet holes on both sides, and it is extremely inconvenient to weld to the metal terminal in the narrow box body.

Dongguan Sunyo-Photovoltaic Co., Ltd. is committed to the development and production of solar photovoltaic connectors, photovoltaic junction boxes, photovoltaic wires and photovoltaic connection components. 

Welcome to call 0769-82281300 to order!

Email: sales2@solar-connector.com