HJ-DCB Series PV DC Combiner Box
1000V DC / Up to 24 Strings / IP65 / Smart Monitoring
The HJ-DCB Series PV DC Combiner Box is a critical safety and aggregation node for commercial and utility-scale solar power plants. Designed to safely merge up to 24 photovoltaic string outputs into a single robust DC feed for the inverter, it delivers top-tier surge protection, dedicated string-level fusing, and an advanced Hall-effect monitoring system. Housed in a rugged IP65 enclosure, it ensures absolute reliability in the world’s most unforgiving solar environments.
Ideal for Solar PV Installations:
- ✓ Utility-Scale Solar Farms (Ground-mounted)
- ✓ Commercial & Industrial (C&I) Rooftop Solar
- ✓ Floating Solar PV Plants & Desert Arrays
- ✓ Hybrid Renewable Energy Microgrids
1. Comprehensive String-Level Protection
Built to handle the rigorous demands of 1000VDC solar arrays. Each incoming PV string (up to 24 strings) is individually protected by specialized, touch-safe PV fuses on both the positive and negative poles. In the event of a fault, the affected string is swiftly isolated without bringing down the entire array, minimizing maintenance costs and maximizing energy yield.
2. Premium Surge & Lightning Defense
Solar plants are highly susceptible to atmospheric electrical activity. Our combiner boxes are equipped with high-capacity, PV-specific DC Surge Protection Devices (SPD) capable of continuously withstanding up to 1000VDC. This crucial layer of defense diverts massive lightning-induced overvoltages safely to the ground, protecting your expensive central inverters.
3. Smart SCADA-Ready Monitoring
Engineered for pragmatic grid integration. The "Smart" variants of the HJ-DCB come factory-fitted with precision Hall-effect sensors. It continuously monitors individual string currents, main bus voltage, internal temperature, and the status of breakers/SPDs. Utilizing the universal RS485 Modbus-RTU protocol, it seamlessly transmits this critical data to the plant's overarching SCADA system for real-time diagnostics.
4. IP65 Extreme Outdoor Resilience
Deployed in the world's most unforgiving climates. The enclosure is available in Hot-Dip Galvanized Steel, Stainless Steel, or UV-resistant Engineering Plastic. With a strict IP65 rating, it offers exceptional resistance against water, dust, rust, and coastal salt spray, guaranteeing stable operation in extreme temperatures ranging from -40°C to a scorching +85°C.
Global Factory Acceptance & Delivery
Every HJ-DCB unit undergoes strict factory testing, including 100% dielectric withstand verification and physical communication port checks. The units are delivered fully pre-wired with standard MC4 solar connectors (or heavy-duty waterproof cable glands) for rapid, error-free "plug and play" physical installation on site.
Technical Specifications
(Note: Parameters cover standard configurations based on our extensive PV combiner series. Enclosure materials and smart monitoring features are customizable upon EPC request.)
| 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 |
Extreme Operating Environment
- Ambient Temperature: -40°C to +85°C.
- Altitude: ≤ 4000m.
- Relative Humidity: ≤ 95%, without condensation.
- Installation Requirements: Designed for outdoor installation in environments free of highly corrosive gases.
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