Solar combiner box solution
ONESTOP is a leading manufacturer of solar combiner boxes in the market. With over 19 years of experience in the electrical industry, we offer high-quality products at the most competitive prices.
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Production technology
Customization and OEM/ODM
High performance-price ratio
Long term partnership
Our solar combiner box products
If you need to learn more about product types or customized solutions, please feel free to contact us at any time.
Provide economically sustainable power solutions
Our electrical solutions have served over 50 countries and regions worldwide.
Long term cooperation with over 300 manufacturing companies, including globally renowned industrial brands
Over 800 industrial projects have been delivered, of which 60% are customized solutions
Why Choose a Solar Combiner Box?
A Solar Combiner Box is essential for solar energy systems, providing protection and efficiency. It combines multiple solar panel outputs into a single output. This not only simplifies wiring but also enhances the overall performance of your solar array. Utilizing a Solar Combiner Box reduces installation time, minimizes potential fire hazards, and ensures compliance with electrical codes. Moreover, they are designed for durability, ensuring long-term sustainability in various weather conditions. Integrating a Solar Combiner Box can significantly improve your solar energy investment.
Safety First
Our Solar Combiner Boxes are engineered with safety features that prevent overcurrent and electrical faults, ensuring the longevity and reliability of your solar system.
- Overcurrent Protection
- Fault Protection
- Durable Design
Simplified Installation
Designed for ease of installation, our Solar Combiner Boxes streamline the wiring process, making setup quick and effortless for both professionals and DIYers.
- Quick Setup
- User-Friendly Design
- Comprehensive Manual
Robust Durability
Built to withstand extreme weather, our Solar Combiner Boxes ensure uninterrupted power generation, protecting your solar investment from environmental damage.
- Weatherproof
- UV Resistant
- Long Lifespan
Enhanced Performance
By consolidating output, our Solar Combiner Boxes optimize the performance of your solar panels, ensuring maximum energy output throughout their lifespan.
- Maximal Energy Output
- Minimized Losses
- Efficient Energy Management
The advantages of our product
Improve system security
The combiner box is equipped with safety devices such as overload protection, short circuit protection, circuit breakers, fuses, etc., which can effectively prevent excessive current or circuit failures
Simplify wiring
The combiner box can concentrate the output cables of multiple solar panels, reducing the complexity of wiring and maintenance difficulty, making the installation process more efficient and convenient.
Protection equipment
By centrally managing current output, the combiner box can effectively distribute power, avoiding damage to inverters and other system equipment caused by overcurrent, thereby extending the service life of the system.
Improve reliability
Our combiner box is equipped with lightning protection devices, which can effectively resist natural disasters such as lightning strikes and ensure the stable operation of the system.
Easy to monitor and maintain
The combiner box is equipped with monitoring function, which can monitor the current output of each battery panel group in real time, helping technicians discover potential problems in a timely manner, and carry out maintenance and repair.
Space saving
Centralized management of current reduces the separate connection method for each battery panel, resulting in a smaller installation space, especially suitable for installation environments with limited space.
What Our Customers Say
Hear from our satisfied customers about their experiences with our Solar Combiner Boxes.
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FAQ
Find answers to your queries regarding Solar Combiner Boxes.
What is a Solar Combiner Box?
A Solar Combiner Box combines multiple solar panel outputs into one, simplifying the
wiring for easier management.
How does a Solar Combiner Box improve safety?
It incorporates protection mechanisms to prevent overcurrent and electrical faults.
Why do l need a Solar Combiner Box?
It reduces installation complexity and enhances the overall efficiency of your solar system.
Can l use a standard iunction box instead of a Solar Combiner Box?
Using a Solar Combiner Box is recommended for optimum protection and compliance with
electrical codes.
How is the installation process for a Solar Combiner Box?
The installation is straightforward, typically requiring less time than traditional wiring
methods.
What materials are used in the manufacturing of Solar Combiner Boxes?
They are constructed from durable, weatherproof materials to ensure longevity.
Are Solar Combiner Boxes compatible with all solar panels?
Most Solar Combiner Boxes are designed to be compatible with various solar panel brandsand configurations.
How do Solar Combiner Boxes enhance energy performance?
By consolidating outputs, they minimize energy losses and optimize power generation.
What should l consider when selecting a Solar Combiner Box?
Look for features like circuit protection, durability, and compliance with local codes.
How long do Solar Combiner Boxes last?
With proper installation and maintenance, they can last for many years, often matching thelifespan of solar panels.
Understand the solar combiner box
Table of Contents
In solar photovoltaic power generation systems, although the combiner box is not apparent, it is the core device that connects photovoltaic modules and inverters. Not only is it a “distribution center” of current, but it is also a key unit to guarantee the safety of the system and enhance power generation efficiency.
It is going to conduct a thorough examination of solar combiner boxes’ operations, technical details, points of selection, and maintenance realities so that you can have the full knowledge necessary to understand its important contribution.
What is a solar combiner box
The solar combiner box is an important equipment of photovoltaic systems, mainly for collecting the currents of multiple solar cell modules and protecting them through DC circuit breakers and fuses to ensure the safe operation of the system. Not only can it improve the stability of photovoltaic systems but also simplify wiring and reduce maintenance costs.
Working principle of solar combiner box
The main function of the solar combiner box is to collect the direct current generated by the solar panels and transmit it to the inverter for conversion. It usually includes key components such as lightning protection devices, DC circuit breakers, and fuses inside to ensure the safety and reliability of current transmission.
The workflow of the system is as follows:
1. Solar cell modules generate direct current;
2. The combiner box collects various currents and provides protection;
3. The combiner box outputs stable current to the inverter
4. The inverter converts direct current into alternating current for power supply or grid connection.
Below is a video introducing a solar combiner box, hoping to deepen your understanding
The core components of a solar combiner box
DC circuit breaker: employed to avoid current overload and provide circuit safety
Lightning protection module: protects the system from lightning destruction
Fuse: prevent overcurrent damage to the circuit
Monitoring module (smart combiner box): Current and voltage monitoring in real time as parameters
Wiring terminals: Connect input and output terminals of photovoltaic modules
The core function of solar combiner box
Current convergence and distribution
The combiner box collects the DC wires of multiple photovoltaic strings and outputs them uniformly, reducing line losses and optimizing the system structure. For example, an 8-input combiner box can integrate the current of 8 groups of photovoltaic arrays into 1 output, simplifying the subsequent inverter connection
Multiple security protections
Overload and short circuit protection: Cut off fault current through fuses (10A-15A) and circuit breakers (such as 100A molded case circuit breakers) to prevent equipment damage
Lightning protection: Equipped with photovoltaic specific lightning protection modules (such as Imax 40kA, Up ≤ 2.6kV) to suppress transient overvoltage and avoid lightning damage
Anti reverse current protection: prevents current backflow between strings and avoids damage to the battery board and components
Intelligent monitoring and data collection
Modern combiner box integrates intelligent monitoring module, which can collect real-time data such as current, voltage, temperature, etc. of each string, and remotely transmit it to the monitoring platform through RS485 communication protocol to achieve fault warning and operation optimization
Classification of solar combiner boxes
Ordinary combiner box: only has basic current combiner and protection functions, including fuses, lightning protection modules, circuit breakers (such as 100A plastic shell circuit breakers), etc., without data monitoring capability.
Intelligent combiner box: Integrated with Hall sensors and RS485 communication modules, it can monitor real-time parameters such as current (0.1-15A), voltage (50-1200V), temperature, etc. of each channel, and supports remote data transmission using Modbus RTU protocol. Some models also have arc detection, leakage current monitoring, and fault warning functions,
Waterproof and dustproof type: IP65 or above, made of stainless steel or polycarbonate (PC) material, capable of withstanding extreme temperatures ranging from -25 ℃ to 70 ℃ and 95% humidity. For example, the QJC HT series combiner box is made of ABS+PC material, which has the ability to resist ultraviolet rays and salt spray corrosion
High voltage combiner box: used for large photovoltaic power plants.
How to choose a suitable solar combiner box?
Key performance indicators
Input parameters: Single input current 10A-15A, peak voltage DC1000V-1500V
Output capability: The total output current can be 100A-350A, suitable for inverters of different powers
Protection level: IP65 or above, ensuring outdoor water and dust resistance
Environmental adaptability: operating temperature -25 ℃~+70 ℃, humidity 0%~95%, no condensation
Selection suggestions
Matching inverter parameters: Select the specification of the combiner box based on the input voltage and power of the inverter. For example, a 10kW inverter can choose a combiner box with 8-10 input channels
Intelligent requirements: If remote monitoring is required, choose an intelligent combiner box with built-in data acquisition module (such as supporting Modbus RTU protocol)
Brand and certification: Priority should be given to brands that have passed international standards, such as ONESTO, Deming Power, NSPV, etc
Price analysis of solar combiner box
The price of solar combiner boxes is influenced by factors such as brand, parameters, and functions
The price of a regular combiner box is about 50-100 US dollars
The price of intelligent combiner box is about 150-700 US dollars
The price of a large photovoltaic power station combiner box can reach up to $700
These are the prices of common solar combiner boxes in the market. If you plan to purchase or purchase solar combiner boxes, it is recommended to choose the ONESTO brand. Our combiner box not only has excellent quality, but also provides you with more competitive prices. As a leading manufacturer of combiner boxes, we also provide professional after-sales service to ensure your worry free use.
FAQ
Are solar combiner boxes required to be installed?
Yes, they help improve system efficiency and security.
Will combiner boxes replace inverters?
No, the combiner box only stores current, and the inverter is employed to convert the current.
Will the combiner box need to be maintained?
Regular inspection of wiring, circuit breakers, and lightning protection modules is required.
What is the difference between an intelligent combiner box and a regular combiner box?
The intelligent combiner box has remote monitoring and intelligent protection functions.
How to determine if the combiner box is damaged?
Can check current output, fuse status, and fault indicator lights.
