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PV System

DNHLX-PV12 / 1 DC PV Smart combiner box


System maximum dc voltage:1000

Maximum input current for each string:15A

Maximum output switch current:20A/32A

Maximum output switch current:160A

Category of test:Ⅱ grade protection

Nominal discharge current:20kA

Maximum discharge current:40kA

Voltage protection level:3.8kV

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DNHLX-PV12 / 1 DC PV smart combiner box

In the world of solar energy, maximizing efficiency and ensuring system reliability are paramount. One essential component that contributes to both these goals is the PV combiner box.

What is a PV combiner box?

A Smart combiner box is an electrical device that combines the output of multiple solar strings into a single DC output. It plays a crucial role in solar power systems by streamlining the management of solar panel arrays, enhancing system performance, and simplifying maintenance tasks.

Key Features

1、Protection and Safety

PV smart combiner boxes are equipped with fuses or circuit breakers to protect against overcurrent conditions. This ensures the safety and longevity of your solar power system.

2、Surge Protection

Incorporating surge protective devices helps safeguard your system against voltage spikes caused by lightning or other transient events.

3、Simplified Wiring

By consolidating multiple inputs into a single output, the PV combiner box reduces the complexity of wiring and minimizes installation time and costs.

4、Monitoring and Control

Modern smart combiner boxes offer real-time monitoring and remote control capabilities, allowing for efficient system management and troubleshooting.

combiner box spd Surge Protective Devices

Schematic Diagram

smart combiner box

Technical Parameter

Model SHLX-PV12/1Electric parameter
Electric parameter
System maximum dc voltage 1000
Maximum input current for each string 15A
Maximum input strings 12
Maximum output switch current 160A
Maximum output switch current N
Number of Output strings 1
Lightning protection
Category of test Ⅱ grade protection
Nominal discharge current 20kA
Maximum discharge current 40kA
Voltage protection level 3.8kV
Maximum continuous operating voltage Uc 1050V
Poles 3P
Structure characteristic Plug-push module
System
Protection grade IP65
Output switch DC isolation switch ( standard ) / DC circuit breaker ( optional )
SMC4 Waterproof Connectors Standard
PV dc fuse Standard
PV surge protector Standard
Monitoring module Optional
Preventing diode Optional
Box material Metal
Installation method Wall mounting type
Operating Temperature ~25℃~+55℃
Elevation of temperature 2km
Permissible relative humidity 0-95%,no condensation

Why Use a Combiner Box in Your Solar System?

1、Enhanced Efficiency

By combining multiple strings, a PV combiner box minimizes power losses and maximizes the overall efficiency of the solar energy system.

2、Reduced Maintenance

With a centralized location for monitoring and protection, maintenance tasks are more straightforward, reducing downtime and operational costs.

3、Scalability

PV combiner boxes make it easier to expand your solar array, as additional panels can be seamlessly integrated into the existing system.

Installation and Maintenance Tips

  • Choose the Right Location

Install the combiner box in a shaded area to protect it from direct sunlight and extreme weather conditions.

  • Regular Inspections

Conduct routine inspections to ensure all connections are secure and components are functioning correctly.

  • Upgrade as Needed

As technology advances, consider upgrading to a smart combiner box to take advantage of improved monitoring and control features.

How many combiner boxes do I need?

The number of combiner boxes you need depends on several factors:

1、Number of Solar Panels: Each combiner box can handle a certain number of strings of solar panels. The total number of panels divided by the number of panels per string gives you the number of strings. The number of strings divided by the number of strings a combiner box can handle gives you the number of combiner boxes required.

2、String Configuration: If your solar power system has multiple strings of solar panels, each string needs to be connected to a combiner box.

3、System Size and Voltage: Larger systems may require more combiner boxes to manage the increased current and voltage.

4、Location and Layout: The physical layout of your solar array may influence the number of combiner boxes, as it might be more practical to have multiple boxes spread across a large installation.

5、Manufacturer Specifications: Different manufacturers have different capacities for their combiner boxes. It’s important to refer to the specific capacity and limits of the combiner box you are using.

Here’s a simplified calculation example:

  • If you have 100 solar panels.
  • Each string consists of 10 panels.
  • You have 10 strings in total (100 panels / 10 panels per string).
  • If each solar combiner box can handle 5 strings, you would need 2 combiner boxes (10 strings / 5 strings per combiner box).

Always consult with a professional solar installer to determine the exact requirements for your specific system.

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