HJ-DCB Series PV DC Combiner Box

Name: HJ-DCB Series PV DC Combiner Box
Brand: HJATIS

The HJ-DCB Series PV DC Combiner Box aggregates up to 24 PV strings into a single DC output for commercial and utility-scale solar plants. It supports a maximum input voltage of 1000V DC and offers string-level fusing, surge protection, and optional anti-reverse diodes. The IP65 enclosure is available in multiple materials. Smart monitoring tracks string currents, bus voltage, and enclosure temperature via RS485 Modbus-RTU.

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PUBLISHED PRODUCT DATA

Catalogue ratings and configurations.

The project data sheet should state the selected rating, options and site conditions.

Technical Specifications

Technical Specifications
Maximum Input Voltage	1000V DC
Number of Input PV Strings	≤8 / 12 / 16 / 24 Strings
Max Current per Input String	0 - 20A (via DC Fuses)
Max Output DC Current	100A / 125A / 160A / 200A / 250A (Varies by string count)
Input Waterproof Terminals	PG9 / PG11 / MC4 Connectors
Output Waterproof Terminals	PG13.5 ~ PG32 (Depending on output current)
Smart Monitoring Parameters	Individual String Current, Bus Voltage, Enclosure Temp, SPD & Breaker Status
Hardware Data Interface	RS485 port supporting Modbus-RTU protocol
Anti-Reverse Function	Optional Anti-Reverse Diode modules
Enclosure Protection Degree	IP65
Enclosure Material Options	Hot-Dip Galvanized Steel / Stainless Steel / Cold-Rolled Steel / Engineering Plastic

CONFIGURATION

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ParameterCatalogue indicationProject input required

01Maximum Input Voltage1000V DCConfirm system voltage compatibility

02Number of Input PV Strings≤8 / 12 / 16 / 24 StringsSpecify required string count

03Max Output DC Current100A / 125A / 160A / 200A / 250A (Varies by string count)Specify required output current

04Enclosure Protection DegreeIP65Confirm environmental requirements

05Hardware Data InterfaceRS485 port supporting Modbus-RTU protocolSpecify communication protocol and cabling

STANDARDS & REPORTS

Standards and product documents.

Applicable references: Complete LV assembly standard family: verify GB/T 7251.1-2023 / IEC 61439-1:2020 and IEC 61439-2:2020 and Project DC protection and SPD requirements. Ask for the edition and reports covering the model offered; a standard number alone does not confirm product compliance.

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APPLICATIONS

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Renewable power plants

Where does the package connect to the plant and the grid? Send the single-line diagram with the supply limits marked.

Remote industrial sites

How will the modules reach the site? Share route, lifting and space limits before the layout is agreed.

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