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ZJBENY- Premier Solar Combiner Box Manufacturer

 

ZJBENY is a trusted manufacturer of protective components for photovoltaic systems across the globe. Through our focus on solar DC protection design, production, and marketing, we can bring brand-building PV protection solutions.
In recent years, ZJBENY has attentively invested resources in research on EV-related products, successively manufacturing other types of products, thus reaping wide market popularity across the world.

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Why Choose Us?
Single-In Microinverter BYM500

Rich Experience

Our experience of working in the electrical industry for more than 30 years allows us to create solar DC components that comply with the latest DC standards. With the inheritance of 30+ years of experience in the research and production of DC protection products, we are continuously dedicated to the EV charging field.

22kW Dual Socket EV Charger

Wide Product Range

ZJBENY offers a full range of solar PV protection products and EV chargers for different solar PV, battery energy storage, and EV charging system. Our Main Product Lines: EV Charger, Rapid Shutdown Device, Microinverter, PV Combiner Box, DC Isolator Switch, DC Circuit Breaker, DC Fuse Holder, DC Contactor, AC Components, etc.

22KW SMART EV CHARGER WITH SOCKET

Broad Market

ZJBENY has attentively invested resources in research on EV-related products, successively manufacturing other types of products, thus reaping wide market popularity across the world.

22KW SMART EV CHARGER WITH SOCKET

Leading Service

We independently complete the R&D, production, marketing, sales, and technical support processes. We satisfy your needs with our long warranty, technical support, and other value-added services.

Brief Introduction to Solar Combiner Box

 

 

Solar combiner boxes combine incoming energy into a single main feed, which is then distributed to a solar inverter. Through wire reductions, labor and material expenses are reduced. Overcurrent and overvoltage protection are built into solar combiner boxes to improve inverter protection and dependability.

 

Features of Solar Combiner Box

  • Single way photovoltaic array output, maximum open circuit voltage 1000V.

  • Multiway photovoltaic array input, single way input array maximum current of 10A.

  • Single way photovoltaic array to join the high-voltage fuse protection, counter-attack protection.

  • Photovoltaic special high voltage lightning protection device protection.

  • Photovoltaic special high voltage circuit breaker control output.

  • Meet outdoor installation requirements, protection class lp65.

ZJBENY Portable EV Charger

 

Most Common Types of Solar Combiner Boxes

  • Fused Solar Combiner Boxes

  • Pre-wired Solar Combiner Boxes

  • Non-Fused Solar Combiner Boxes

  • Dual Fused Solar Combiner Boxes

  • Solar Combiner Boxes with Circuit Breakers

  • Multi String Solar Combiner Boxes

2 Guns DC EV Charging Station BDC

 

Components of Solar Combiner Box

 

DC Molded Case Circuit Breaker

DC molded case circuit breakers can be used to protect circuits in solar power generation systems. The rated current of the Tongou DC molded case circuit breaker is between 63A and 630A, which is suitable for higher-power photovoltaic systems.

PV String Fuse

The photovoltaic string fuse will blow the fuse in the event of an accident, preventing the reverse current from continuing to flow, and protecting cables and other equipment from further damage.

DC Surge Protection Device

When there is transient overvoltage on the protected line, the surge protector will conduct the surge into the ground to protect the rear equipment from the surge.

 

Four Safety and Maintenance Tips for Your Solar Combiner Box

Clean the Inside of the Combiner Box

It is important to keep the inside of the combiner box clean. Cleaning can be done with soap and a soft damp towel, but please keep the combiner box dry with a dry towel after cleaning.

Check the Surge Protector

Check whether the window of the surge protector is green. If it is red, it means that it has failed and the module needs to be replaced.

 

Check Internal Wiring Connections

Please double-check whether the combiner box has stopped working. Wear insulating gloves and check the connected wires for looseness and oxidative deterioration in exposed areas. The replacement of materials must be done by people with professional electrical knowledge.

Replace a Blown Fuse

After the fuse is blown, it cannot be used again, it can only be replaced. Before replacing the fuse, be sure to pay attention to the circuit breaker, disconnect the circuit breaker, and check with a multimeter before replacing the fuse.

 

 

 
How to Choose Solar Combiner Box
1. Functions

Your solar combiner box selection may, at times, come down to availability and price point. There are a couple of off-the-shelf solutions equipped with a wide range of potential configurations for residential installations, saving the extra expense and time related to something customized.

Now, based on the components of your system, the combiner box may have to perform more than just basic functions – combining the fuses and circuits. Not all manufacturers have the ideal off-the-shelf combiner box ready for each situation. Do you want simplicity and flexibility? Suppose you have two separate solar systems that run into the same box and will shoot out then to independent controllers. Certain boxes handle such a problem in absolutely no time, and others have to be tailored.

Before choosing a combiner, please define the inverter in use. With so many choices available, from conventional string inverters to transformer-less with MPPT, you must narrow down the code-compliant combiners.

2. Surveillance

Wireless monitoring technologies are accumulated inside the combiner box by the manufacturers. This ensures string-level and panel-level monitoring of voltage, current, and temperature. Monitoring provides real-time feedback when assigning the field, besides the inherent advantages during the installation. In this way, any mistakes or faults will be noticed early.

Solar combiner boxes need a little maintenance. The level of maintenance must be determined by the frequency of usage and the environment. It seems like a great idea to examine them for loose connections and leaks, but a correctly installed solar combiner box would last as long as your project.

When selecting the combiner box, quality is perhaps the essential factor to consider, specifically since it is the first equipment attached to the solar module's output. Combiner boxes are quite affordable when compared to other different solar project components. Remember, a faulty box can cause an unexpected failure with smoke and flames.

The use of the whip is a new feature. It is a wire lying at the end of the solar connector. The manufacturers attach whips that enable the installer to connect output wires via a solar connection. The contractor does have to drill holes or get fittings.

3.Safety

Ensure that everything you select adheres to the code standards in your jurisdiction. For the roof mount, as per the rule in 2011, everyone has to install a disconnecting combiner within six feet of the array. Few codes require a rapid system shutdown.

The arc fault is the high-power electrical discharge between the conductors that release substantial heat. Insulation between the wires gets broken down

4. Necessity

Certain locations can connect everything without a combiner, based on the materials in use. The BLA or Big Lead Assembly harness, a thick gauge of wire, can handle the arcing voltage current without a combiner.

A solar combiner box is unnecessary for projects with two or three strings. Instead, it would help if you connected the string to the inverter. Combiner boxes are perfect for huge projects that have over 4000 strings. Different sized boxes are used in commercial applications to procure power from abnormal building layouts. They help the site planners to maximize power while decreasing material expenditures for utility-scale projects.

 

Certifications

 

 

We have the UL1741 mark, certification issued by Underwriters Laboratories, the most important for system interconnection tests in the USA. ZJBENY also holds SAA, CB, CE, TUV, ISO, RoHS certifications.

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Contact US 

                          If you have any enquiry about quotation or cooperation, please feel free to email us at benyi@zjbeny.com, or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.

                          TEL: +86-577-57177008
                          FAX: +86-577-57177007
                          Address: Changjiang Rd, Wenzhou Daqiao Industry Park, Yueqing, Wenzhou, Zhejiang, China, 325603

 

Frequently Asked Questions

Q: Where do you put a solar combiner box?

A: The combiner boxes are placed between the solar inverters and modules. Hence, such boxes require little maintenance as well. Maintaining them regularly is suggested to make sure that there are no leaks. This way, loose connections will be identified before a major disruption happens.

Q: What is a 2 string combiner box?

A: The pre-wired Solar 2 string combiner box is designed for up to 2 input strings and 1 output string fusing both + & - strings with 15A fuses, 40Amp PV Isolator and Class II surge arrestor.

Q: How do I choose a combiner box?

A: Maximum open-circuit voltage (Voc)
First, we need to know the maximum open-circuit voltage (Voc) of your solar system design, whether it is 600 / 1000 / 1500V DC. The most common Voc in the market now is 1000V DC and we are also moving towards 1500V DC in Malaysia. This Voc is totally dependent on the system design.
Maximum short-circuit current per string
So where can we find this info? We are able to know what is our maximum short-circuit current by identifying the short-circuit current of the individual solar module that you have selected, and then multiplying it with the maximum short-circuit current multiplier. Every country has their own specific requirement for the maximum short-circuit multiplier; it can be 1.25 or 1.5 and etc.
Input and Output
Input here is referring to the number of solar strings going into the SCB and output is referring to the number of MPPT (Maximum Power Point Tracker) involved. You will be able to find the info on the number of MPPT from the inverter that you are using in your system. Once this is confirmed, we will know the configuration you need for your SCB.
Fuse holder Polarity
We need to also find out from the customer whether they would like to have fuse holder at positive polarity only or at both positive and negative polarity. From protection point of view, we encourage our customers to have fuse holder at both positive and negative polarity because this will give higher protection to the SCB on the incoming side. However, it is still fine to have fuse holder at only positive polarity to fulfil the local standard requirement.
Monitoring features
Our SCB is able to monitor both voltage and string current if these are required using our Solarcheck modules, which uses Hall’s effect.

Q: Is a solar combiner box necessary?

A: If you have more than 4 panels or strings of panels to combine, we definitely recommend a combiner box. There are also two types of wiring for combiners. Most common is the standard one that has been around for years where each pair of wires from the panel junction box is connected to terminal blocks.

Q: Does a solar combiner box increase the voltage?

A: In larger solar photovoltaic (PV) systems, multiple solar panels are connected in series in a string to increase the voltage before going to the inverter. Multiple strings of the solar panels are also combined together in parallel to produce higher output currents.

Q: Is the location of combiner boxes important why?

A: Optimal placement can help limit power loss and ensure efficient operation. Additionally, the location of the combiner box can impact the cost of the system, as a non-optimal placement may lead to increased voltage and power losses.

Q: What is inside a combiner box?

A: The basic components in a solar PV combiner box include PV string fuses, DC molded case circuit breakers, and DC surge protection devices. There is also other additional equipment, such as monitoring devices.

Q: What is the difference between AC and DC combiner box?

A: The DC combiner box can realize multiple inputs and multiple outputs. The input depends on the number of PV strings and PV panels, and the output depends on the number of inverters. The AC combiner box is one more input and one output. The function of the combiner box is to collect the current.

Q: What is solar AC combiner box?

A: The solar combiner box is a strong device that combines multiple solar panel strings from photovoltaic (PV) cells. It culminates and brings the flowing output of the strings in one place, providing a perfect enclosure and easing their operation. The connected strings can be AC or DC.

Q: What is the function of combiner box in PV system?

A: The combiner box's function is to combine the output of multiple solar strings. The output of the fused inputs is merged onto a single wire that connects the box to the inverter, and each string conductor lands on a fuse terminal.

Q: How do I choose a solar combiner box?

A: The ideal combiner is often determined by its ease of deployment and installation, as well as the headaches it eliminates from the project. A box with pre-wired fuse holders and pigtails going out can be a plug-and-play solution that doesn't require the installation of a licensed electrician.

Q: What is the use of DC combiner box?

A: First and foremost, DC combiners enable the "Virtual Central" concept: In ground-mounted solar power plants, the inverters are installed at a central location, while the DC combiners are spread across the PV module array.

Q: Is isolator a main switch?

A: An isolation switch is fundamental when working with electrical circuits, as they are used to ensure the circuit is safe and de-energized which allows maintenance work to take place. Also referred to as main switches, these devices separate the circuit from the main power source and dispels any trapped charges.

Q: What is the difference between MCB and isolator switch?

A: MCB is an automatically-operated circuit breaker for overload and short circuit protection, while an Isolator is a manually-operated device for simply breaking off the circuit. They are usually connected to the main power supply to break the circuit when needed.

Our company is one of the leading solar combiner box manufacturers and suppliers in China, providing the best customized service. Welcome to wholesale high quality solar combiner box for sale here and get quotation from our factory.

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