We are a professional manufacturer of the Zhechi Electric®Solar Distribution Junction Boxes is PV combiner box for the on-grid solar system with 12 experience. We are committed to the quality and innovation of our products. Our factory comply with ISO 9001 Standard and all products are qualified by Intertek with CE and CB Certificate. MOQ is 1 pc.
1. In the solar power system, in order to decrease the connecting line, easy maintenance, reduce losses, optimize system structure, improving the safety and reliability of items, the PV combiner box is usually in need between the solar panels and inverter.
2. Except the PV junction function, the pc combiner box should also have reverse current prevention, over-current protection, over-voltage protection, lightning protection, etc a series of perfect protection functions, meanwhile, checking the running state, current, voltage, and power after the junction, arrester state, collection of DC circuit breaker state and Arc detection, leakage detection(optional) and so on.
3. The PV combiner box we manufacture is equipped with all the functions mentioned above, configuration with on-grid/off-grid solar inverter to make up a complete set of solar power systems.
4. When choosing the PV combiner box, based on the input dc voltage range and output power of inverter, certain qty of panels will be connected in series as a string, certain strings in parallel will connect to the PV combiner box for junction, via control of circuit breaker and protection of arrester, then feed to the inverter.
1. Conform to CGC/GF002:2010, PV Array Junction Box Technical Specifications
2. Allowable maximum 24 strings panels to connect, Nominal voltage of each string is 10A, maximum 15A
3. Total output current is 250A, the maximum voltage is 1000Vdc
4. For each string, high voltage fuse protection, and anti-connection protection.
5. Equipped with PV high voltage arrester protection
6. PV high voltage circuit breaker control the output, pressure-resistant DC1200V, fusing current is optional
7. In line with outdoor installation, protection class IP65
8. Isolate RS485 port used for remote data communication, support MODBUS-RTU protocol.
9. Built-in comprehensive protection alarm function, not only the variety of alarm parameters are programmable set, but also each alarm function can be set "On" Or "Off)
10. Real-time the harmful arc in the DC circuit, once there is the harmful arc, an alarm will work and directly make the trip switch and cut off fault circuit, accordingly, prevent the fire disaster, etc from the arc.
|System maximum DC voltage||
|Maximum input current for each string||15A|
|Maximum input strings||24|
|Maximum output switch current||360A|
|Maximum inverter MPPT||N|
|Number of Output strings||1|
|Category of test||Grade 2 protection|
|Nominal discharge current||20kA|
|Maximum discharge current||40kA|
|Voltage protection level||3.8kV|
|Maximum continuous operating voltage Uc||1050V|
|Structure characteristic||Plug-push module|
|Size of the input waterproof terminal||PG9/PG11|
|Size of the output waterproof terminal||PG21~PG29|
DC circuit breaker (standard)/
DC isolation switch (optional)
|MC4R Waterproof Connectors||Standard|
|PV DC fuse||Standard|
|PV surge protector||Standard|
|Monitoring module(optional)||Detect current of each channel, bus voltage, the status of circuit breaker and lightning protector, box temperature|
|Auxiliary power supply||
Auxiliary power supply: AC85V~265V
|Communication mode/protocol(optional)||RS485 bus/standard MODBUS-RTU protocol|
|Prevent-reverse function (optional)||Can be equipped with a modularized and encapsulated prevent-reverse diode|
|Box material||Hot galvanized steel/stainless steel/cold rolled sheet|
|Installation method||Wall mounting type|
|Operating Temperature||-40°C ~ + 85°C|
|Permissible relative humidity||0-95%, no condensation no corrosive gas|
Width x High x Depth (mm)