The function of a photovoltaic combiner box is to combine the output of several solar strings. The conductors of each string fall on a fuse terminal, and the output of the fuse input is combined onto a single conductor connected to the combiner box and inverter. Once you have a photovoltaic combiner box in your solar project, there are usually some additional features that are integrated into the combiner box.

The solar combiner box also combines the incoming power into a main power supply that is distributed to the solar inverter. This saves labor and material costs by reducing wire. Solar combiner boxes are designed to provide overcurrent and overvoltage protection to increase the protection and reliability of the inverter.

Photovoltaic combiner boxes require little maintenance, and the environment and frequency of use should determine the level of maintenance. Check them regularly for leaks or loose connections. If a combiner box is installed correctly, it will continue to function throughout the life of the solar project.

Quality is the most important consideration when selecting a photovoltaic combiner box, especially since it is the first piece of equipment connected to the output of the solar module. Combiner boxes are inexpensive compared to other equipment in a solar project, but a faulty combiner box can fail in dramatic ways, including fire and smoke.

Depending on the application, the combiner boxes are equipped with monitoring devices that measure current, voltage and temperature to ensure string availability and maximize power generation. The subsystems formed by string combiner boxes can be standardized according to the number of strings, voltage and rated current. Yirui offers different series of photovoltaic combiner boxes, each product series is dedicated to specific installation conditions with typical configurations.

Advantages of photovoltaic combiner boxes:

—— 1. Photovoltaic combiner boxes improve the safety of solar panels and the entire photovoltaic power station.
—— 2. Photovoltaic combiner boxes, also known as DC distribution boards, are factory assembled with monitoring equipment, fuses, surge protection devices and disconnect switches as a plug-and-play solution.
—— 3. Different shell sizes can be customized and can flexibly cover up to 32 strings.
—— 4. Equipped with a solar photovoltaic DC high-voltage lightning protector, both the positive and negative poles have dual lightning protection functions.
—— 5. Lightning counting function to facilitate understanding of the intrusion and frequency of lightning disasters.
—— 6. Equipped with a two-level protection device of high-voltage DC fuse and circuit breaker.
—— 7. The protection level reaches IP65, meeting the requirements for outdoor installation.
—— 8. Installation and maintenance are simple and convenient, and the service life is long.

Yirui Electric is committed to providing high-quality electrical component products and a series of photovoltaic products for solar photovoltaic power generation systems, smart fire safety systems, urban smart electrical systems, power grid distribution automation, medium and high-voltage transmission and distribution systems, etc.