In terms of appearance and function, there is no obvious difference between MC4 and A4 connectors. Therefore, customers generally have a note that it is required to match with MC4. The reason for this is that there are MC3 connectors with another appearance on the market, which are generally used on small junction boxes and cannot match with MC4.

The selection basis of connector: according to the diameter of wire metal wire, the inner diameter of mutual matching wire of MC4 is generally about 4mm, while the inner diameter of mutual matching wire metal wire of MC3 connector is generally about 2.5mm。

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.