PV DC Combiner Box
✅High-Density Centralized Management
✅Comprehensive Multi-Level Safety Protection
✅ Real-Time Smart Monitoring Capabilities
✅ Maximized Power Generation Efficiency
- Product Introduction
The PV DC Combiner Box is a critical electrical node engineered to bridge the gap between photovoltaic (PV) arrays and central or string inverters. Deployed across centralized utility-scale solar farms, commercial distributed PV systems, and industrial arrays, PV DC Combiner Box's core operational capabilities are defined by four vital pillars: combining, monitoring, protecting, and managing.
Intelligent Power Aggregation & Control
Intelligent Power Aggregation & Control
Input Side Compatibility: Designed to seamlessly interface with multiple solar strings, offering flexible configurations ranging from 8, 12, 16, to 24 inputs (and customizable higher-string variants).
High-Capacity Output: Efficiently aggregates these multi-channel inputs into a unified, high-voltage, high-current DC circuit. This bulk power is outputted via one or two robust main feeder cables directly to the inverter system.
By optimizing the physical wiring architecture, the PV DC Combiner Box significantly slashes balance-of-system (BOS) costs, enhances overall operational efficiency, and ensures robust fault isolation and safety for modern solar power plants.
Model Meaning
- 1
HLX: PV combiner box series code
2PV: Photovoltaic DC combiner application
34: Quantity of PV input strings (range: 1~24)
41: Quantity of DC output channels (range: 1~3)
5M: Equipped with monitoring module
6D: Built-in anti-reverse blocking diode
75: DC system voltage grade (5=DC1000V; 3=DC550V)
Technical parameters
| Items | HLX-PV6/2 | HLX-PV6/3 | HLX-PV6/3 | |
Electrical parameters | Maximum DC voltage of the system | 1000 | 1000 | 1000 |
| Maximum input current of each channel | 20A | 20A | 20A | |
| Maximum input channels | 6 | 6 | 8 | |
| Maximum output switching current | 32A/40A | 20A/32A | 20A/32A | |
| Number of inverter MPPT | 2 | 3 | 2 | |
| Output channels | 2 | 3 | 2 | |
| Lightning protection | Test class | II pole protection II | ||
| Nominal discharge current | 20kA | 20kA | 20kA | |
| Maximum discharge current | 40kA | 40kA | 40kA | |
| Voltage protection level | 3.8kV | 3.8kV | 3.8kV | |
| Maximum continuous operating voltage | 1050V | 1050V | 1050V | |
| Number of poles | 3P | 3P | 3P | |
| Structural characteristics | Pluggable module | |||
Lightning protection characteristics | Class of protection | IP65 | ||
| Output switch | Dc Circuit breaker (standard)/ DC Rotary isolating Switch (optional) | |||
| SMC4 waterproof connector | Standard | |||
| Photovoltaic DC fuse | Standard | |||
| Photovoltaic direct Surge Protective Device | Standard | |||
| Monitoring module | N | |||
| Blocking diode | N | |||
| Box material | PVC | |||
| Installation mode | Wall-mounted | |||
| Operating temperature | -25℃ ~+55℃ | |||
| Altitude | 2000M | |||
| Allowable relative humidity | 0~95%, No condensation | |||
| Width × height × depth (mm) | 400×300×160 | 500×400×190 | 500×400×190 | |
Functional Features
Functional Features
1. High-Density Centralized Management
Streamlined Architecture: Supporting configurations from 4 to 24 input strings, the combiner box centralizes the management of multi-channel PV module outputs. This significantly simplifies overall balance-of-system (BOS) design, minimizes DC cabling layout, and reduces field maintenance overhead.
2. Comprehensive Multi-Level Safety Protection
Advanced Fault Mitigation: Equipped with heavy-duty, high-voltage DC fuses and integrated Surge Protection Devices (SPDs). This provides robust overcurrent and overvoltage protection, safeguarding downstream inverters from lightning transients and string-level electrical faults.
3. Real-Time Smart Monitoring Capabilities
Intelligent String Analytics: Integrates advanced smart monitoring modules to track string-level current, busbar voltage, enclosure temperature, and SPD status in real time. This high-resolution data stream enables rapid fault localization and maximizes power plant uptime.
4. Maximized Power Generation Efficiency
Optimized Conduction Paths: Engineered with high-conductivity busbars and premium internal components to minimize internal contact resistance. By optimizing current paths, it drastically reduces localized $I^2R$ power losses and enhances overall energy yield.
Applications
Applications
Centralized Utility-Scale Solar Farms: Optimally engineered for large-scale, ground-mounted photovoltaic power plants interfacing with high-capacity centralized inverters.
Commercial & Industrial (C&I) Distributed Systems: Perfectly suited for commercial, industrial, and institutional rooftop installations, streamlining complex multi-string wiring layouts.
Agrivoltaics & Floating Solar Arrays: Built with ruggedized enclosures to withstand specialized, harsh environmental demands, including high-humidity agricultural zones and high-salinity, corrosive offshore or floating PV installations.
Off-Grid & Hybrid Microgrids: Seamlessly integrates with battery energy storage systems (BESS) and off-grid inverter topologies to manage remote, localized power networks.
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