PV Combiner Boxes
China Factory Suppliers PVB Series Photovoltaic Combiner Box with SPD – Enhanced Safety & Efficiency
The PVB series photovoltaic combiner box is a wall-mounted solution designed for optimal performance in solar energy systems. Manufactured in China, this combiner box integrates essential safety features, including reverse current, overcurrent, overvoltage, and lightning protection. As a leading supplier in the industry, our factory offers customizable configurations to meet specific needs, effectively enhancing the efficiency and safety of photovoltaic installations. Choose our PVB series combiner box for reliable and secure solar energy management
Summary
PVB series PV Array Combiner Box is used for the connected of PV inverter and PV array to lessen the cable for the connecting, easy to maintain and improve the reliability. We always fix the DC convergence device between the PV inverter and PV array. With many years of experience in the PV power system, it is specially designed for the high efficiency and reliability; it is the supporting components of our PV inverter for the PV power generating. You could connect a certain number of PV components in series to be the PV array according to the voltage range of DC input; then, connect the PV array to PV lighting protection combiner box for the converge, through the output of lightning protection device and breaker, it is easy for switching-in of PV inverter and improve the system safety and lessen the installing time.
Product Overview
As a key component of a solar power generation system, the PVB series photovoltaic combiner box significantly simplifies the connection architecture between the photovoltaic array and the inverter by combining multiple photovoltaic module inputs into a single output. The product adopts an industrial-grade wall-mounted installation solution, which saves space and facilitates daily maintenance by operation and maintenance personnel. Parameters such as the number of input channels and rated current can be customized according to project requirements to adapt to various photovoltaic power station scenarios.
The built-in intelligent protection system includes: diode isolation to prevent reverse current, fuse overcurrent protection, MOV overvoltage absorption device and Type II surge protector, which fully guarantees the stable operation of the system in harsh environments. Its protection level reaches IP65 and the operating temperature range is -25℃ to +60℃, meeting the technical specifications of the mainstream global photovoltaic market.
Features
- IP65 protection class, suitable for outdoor installation use
- High voltage lightning protection (SPD) special for PV
- Each PV input with DC fuse protection and anti-reverse protection (optional)
- PG Cable Gland / MC4 terminal connector (optional), each terminal with waterproof function, convenient and safe system wiring
- Output standard copper core cable 70mm² (max output 95mm²)
- Wide DC input voltage range, max open-circuit voltage up to 1000V
- Wall mounting type — easy to install, easy and convenient maintenance
- Can be custom made to user’s specification
Product Parameters
| Type Designation | PVB-2 | PVB-4 | PVB-5 | PVB-6 |
|---|---|---|---|---|
| Max. PV Array Input String | 2 | 4 | 5 | 6 |
| Max. PV Array Voltage | 400Vdc or 1000Vdc | |||
| Rated Current for Each String (Replaceable) | 10A / 15A | 10A / 15A | 10A / 15A | 10A / 15A |
| Output Terminal Type | PG21 | |||
| Rated Output Current | 20A / 30A | 40A / 60A | 50A / 75A | 60A / 90A |
| Input Cable Waterproof Connector | PG7 (4mm PV cable) | |||
| Output Cable Waterproof Connector | PG21 | |||
| Output DC Circuit Breaker | Yes | |||
| PV Special Lightning Protection Module | Yes | |||
| Anti-reverse Module Protection | Optional | |||
| Protection Degree | IP45 | |||
| Environment Temperature | －25 ～ +60℃ | |||
| Environment Humidity | <90% No condensation | |||
| Altitude | ≤3000m | |||
| Installation | Indoor / Outdoor | |||
ABS Engineering Plastic Type
PV Combiner Box — ABS Engineering Plastic Type
Outdoor Coating Process and Stainless Steel Type
PV Combiner Box — Outdoor Coating Process & Stainless Steel Type
Frequently Asked Questions
What is the maximum open-circuit voltage supported by the PVB series combiner box?
The PVB series PV Array Combiner Box supports a wide DC input voltage range with a maximum open-circuit voltage of up to 1000V, making it compatible with most mainstream photovoltaic module configurations on the market.
What protection features are built into the PVB combiner box?
The PVB series includes comprehensive protection mechanisms: DC fuse overcurrent protection for each input string, anti-reverse diode isolation, MOV overvoltage absorption, a Type II surge protector (SPD) specially designed for PV systems, and an output DC circuit breaker for safe switching.
Is the PVB combiner box suitable for outdoor installation?
Yes. The PVB series is designed for both indoor and outdoor use. It features an IP65 protection rating (as noted in the product overview), wall-mounting installation, waterproof cable gland connectors on each terminal, and an operating temperature range of -25℃ to +60℃, ensuring reliable performance in harsh outdoor environments.
Can the PVB combiner box be customized for specific project requirements?
Absolutely. The PVB series supports customization of input channel count, rated current per string, connector types (PG Cable Gland or MC4), and other parameters to meet the specific technical requirements of different photovoltaic power station projects.
What are the available models and their corresponding input string configurations?
The PVB series is available in four standard models: PVB-2 (2 input strings), PVB-4 (4 input strings), PVB-5 (5 input strings), and PVB-6 (6 input strings). Each model supports a rated current of 10A or 15A per string and is available for 400Vdc or 1000Vdc array voltage configurations.
What is the maximum installation altitude for the PVB combiner box?
The PVB series combiner box can be installed at altitudes of up to 3000 meters above sea level, making it suitable for highland and mountainous photovoltaic power station projects. The operating humidity tolerance is less than 90% (non-condensing).
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