What is the Function of Photovoltaic Combiner Box? What are the Components?

For some large-scale photovoltaic systems, in order to improve stability and facilitate system maintenance, it is generally necessary to add a DC confluence device between the photovoltaic modules and the inverter, connect the photovoltaic modules in series to the lightning protection combiner box of the photovoltaic array for confluence, and then connect inverter. Today we talk about the function of the photovoltaic combiner box? What are the components of a photovoltaic combiner box?

1. What is a photovoltaic combiner box

The photovoltaic combiner box is a wiring device to ensure the orderly connection and confluence function of photovoltaic modules in the photovoltaic power generation system. Photovoltaic series and parallel are connected to the photovoltaic combiner box. After converging in the combiner box, the controller, DC power distribution cabinet, photovoltaic inverter, and AC power distribution cabinet are used together to form a complete photovoltaic power generation system. Grid-connected.

2. What is the function of photovoltaic combiner box

A combiner box is a device that collects current. It is mainly used in large and medium-sized photovoltaic systems. There are many strings of modules in the photovoltaic array and many outputs. A device must be needed to gather these outputs so that they can be directly connected to the inverter. . In the photovoltaic power generation system, the combiner box is a wiring device to ensure the orderly connection and confluence function of photovoltaic modules. The device can ensure that the photovoltaic system is easy to cut off the circuit during maintenance and inspection, and reduces the scope of power failure when the photovoltaic system fails.

3. Lightning protection design of photovoltaic combiner box

Since the photovoltaic combiner box is installed in an outdoor environment, lightning strike protection for the combiner box must be considered. For this reason, special lightning protection modules for photovoltaic DC, DC fuses and circuit breakers can be configured in the DC output part of the combiner box, and working status indicators, lightning counters, etc. can be set. Once a lightning strike occurs, the lightning protection module will quickly discharge the excessive electric energy to ensure the stable output of electric energy and protect the combiner box from lightning strike damage. The lightning protection components installed in the combiner box are called photovoltaic lightning protection combiner boxes to ensure the maximum efficiency of the solar photovoltaic power generation system.

4. Components of photovoltaic combiner box

1. Cabinet

The cabinet is generally made of steel plate sprayed plastic, stainless steel, engineering plastics and other materials. It is beautiful in appearance, durable, simple and convenient to install, and the protection level reaches above IP54. It is waterproof and dustproof and meets the requirements of long-term outdoor use.

2. Electronic components

The combiner box is generally installed with circuit breakers, leakage protection switches, lightning protection switches, surge protectors, fuses and other components.