What is the function of the photovoltaic combiner box?

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1. What is a photovoltaic combiner box

In the photovoltaic power generation system, the photovoltaic combiner box is a wiring device that ensures the orderly connection of photovoltaic modules and the confluence function. It means that the user can connect a certain number of photovoltaic cells with the same specifications in series to form a photovoltaic series, and then connect several photovoltaic cells in series. The photovoltaic series and parallel connection are connected to the photovoltaic combiner box. After the combiner box is combined, the controller, DC power distribution cabinet, photovoltaic inverter, and AC power distribution cabinet are used together to form a complete photovoltaic power generation system. connected to the grid.

Photovoltaic Combiner Box

2. What is the role of the photovoltaic combiner box?

The combiner box is a device that collects current. It is mainly used in large and medium-sized photovoltaic systems. The number of component strings in the photovoltaic array is large and the output is large. A device must be needed to collect 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 that ensures the orderly connection of photovoltaic modules and the function of combining. The device can ensure that the photovoltaic system is easy to cut off the circuit during maintenance and inspection, and reduce the scope of power outage when the photovoltaic system fails.

Photovoltaic Combiner Box

 

3. Lightning Protection Design of Photovoltaic Combiner Box

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