Solar DC Combiner Box

Solar String Combiner Box for solar pumping system or solar system


Solar String Combiner Box is required in large scale solar system or solar pump system, it is installed between PV array and solar inverter with the following main function:

Minimize the cable length.

Increase reliability and stability by providing protection against lighting and short circuit.

Simplify maintenance by reducing connection lines between PV array and solar inverter kit.

The VKCB lightning protection combiner box combines the DC input and sink of 2,3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24, 30,36, 48 PV modules to 1 output, each channel is equipped with a fuse, and the output is equipped with a lightning arrester and a circuit breaker

The input wiring of the DC power distribution cabinet and the inverter is greatly simplified. Provide lightning protection, short circuit protection and grounding protection.

The combiner box is divided into two types, intelligent and non-intelligent. The intelligent lightning protection combiner box is equipped with a sink monitoring unit. It can monitor the current input from each photovoltaic cell string, the summed output voltage, the temperature inside the box, the status of the lightning arrester, and the status of the circuit breaker.

Design and configuration are strictly accordances with the requirements of “Technical Specification for Photovoltaic Confluence Equipment” CGC/GF 037:2014. Provide users with security, concise, beautiful, and suitable photovoltaic system products. The product is wall-mounted and can be adapted to a variety of harsh environments. In addition to the relevant core components. Others can be customized according to user requirements.

Use special photovoltaic DC surge protector.

Use special photovoltaic DC circuit breaker, rated voltage can reach DC 1500V

IP 65 protection. Waterproof, dust and UV protection

Applicable to wide area. Strict high and low-temperature testing

Easy installation. Simple system wiring, easy to wire

Box is metal material, like cold-rolled steel

DC Solar Combiner Box Model Series: VKCB

Electrical parameters
System max DC voltage 1500V
Max input current per channel 15A
Max input numbers of input channels 1~48 channels
Number of inverter MPPT N
Max output switching current 800A
Number of output channels 1
Lightning protection
Test category II grade protection
Nomimal discharge current 20KA
Max discharge current 40KA
Voltage protection level 3.8KV
Max continuous operating voltage 1500V
numbers of poles 2002/3/4
Structure charactoristic Plug-push module
Protection grade IP 65
Output switch DC isolatation switch (optional)/
DC circuit breaker (standard)
SMC4 waterproof connector Standard
PV DC fuse Standard
Monitoring module Optional
Preventing diode Optional
Box material Metal
Installation method Wall-mounted
Operating temperature -25℃ ~ +55℃
Altitude 2000m
Allow relative humidity 0 – 95%, nocondensation

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