Ceritified
ISO9001, CE, TUV ,CB, RoHS
Product Range
5000+ Specifications
Services
ODM & OEM
ISO9001, CE, TUV ,CB, RoHS
5000+ Specifications
ODM & OEM
GA&DA is a professional manufacturer of solar PV combiner boxes, providing reliable DC distribution and protection solutions for EPCs, distributors and solar system integrators worldwide.
GA&DA offers PV and AC combiner box solutions for different solar system layouts, installation environments and protection requirements. Select the enclosure material and electrical configuration that best fit your project.
| Combiner Box Type | Key Features | Best For | GA&DA Solution |
|---|---|---|---|
| Metal PV Combiner Box | Robust metal enclosure with multiple PV string inputs, DC fuses, DC breakers, surge protection and isolator options. | Commercial rooftops, ground-mounted systems and demanding outdoor installations. | Available in metal enclosure configurations for project-specific string quantities and protection requirements. |
| Plastic PV Combiner Box | Compact lightweight enclosure with transparent cover options, DC protection components and convenient cable entry. | Residential systems, small commercial PV arrays and distributors needing flexible configurations. | Available in plastic enclosure designs with visible internal components and configurable DC protection. |
| DC Disconnect Combiner Box | Integrates a DC isolator or disconnect function for safe shutdown before maintenance, testing or emergency servicing. | PV systems where fast and clearly defined DC isolation is needed. | Can be configured with DC isolators, DC MCBs, DC MCCBs, fuses and Type 2 DC SPDs. |
| AC Combiner Box | Collects AC outputs from multiple inverters and supports AC circuit protection, isolation and surge protection. | Multi-inverter commercial systems and larger solar installations. | Can be configured with AC MCBs, MCCBs and Type 2 AC surge protection devices. |
Need help selecting a combiner box? Share your system voltage, inverter quantity, PV string quantity, installation environment and required protection components. Our team will recommend a suitable configuration.
Request Configuration SupportA solar combiner box is a protective electrical enclosure used to collect and manage multiple PV strings in one place. A PV string is a group of solar panels wired in series. The combiner box merges the output from several strings into one main DC circuit before the power is sent to the inverter.
Its main job is simple: organize string connections, protect electrical components, and help reduce unnecessary energy loss within the solar PV system.
A combiner box is usually needed when more than three solar strings connect to one inverter. For smaller systems with fewer than three strings, the strings can often be wired directly to the inverter. Large commercial and utility-scale solar plants benefit most from this arrangement. By combining strings at distributed points, system designers can reduce cable use, installation time, and labor costs without reducing the plant’s maximum output.
A properly selected, correctly installed combiner box normally needs very little maintenance. However, regular inspection is still important. Check the enclosure, wiring, terminals, fuses, and protection devices to confirm that everything remains secure and functional.
Quality matters. A defective or poorly made combiner box can overheat, fail, or even create a fire risk that damages the entire PV system. The enclosure and its components should meet the technical requirements of the project and comply with applicable standards, such as UL 1741. Where AC and DC circuits are both present, they must be kept separate to support safe installation and meet electrical-code requirements, including NEC 690 in the United States.
A solar combiner box collects the output of several solar panel strings and routes that power to one inverter. It is widely used in larger PV arrays, where running every individual string directly to the inverter would make wiring more complex and harder to manage.
Inside the enclosure, each incoming string is typically connected through a fuse or other overcurrent protection device. These components help isolate faults and protect the system if excessive current occurs. Many combiner boxes also include surge protection devices (SPDs). During a voltage surge, the SPD helps prevent damaging energy from reaching the inverter and may activate the system’s shutdown protection.
A combiner box is designed for either DC or AC circuits. It should not combine both in the same enclosure. Keeping AC and DC circuits separate is important for safe operation and code compliance.
The internal arc-control design also differs by circuit type. AC combiner boxes commonly use grid-based arc extinguishing structures, while DC models often rely on magnetic blowout methods to control and extinguish arcs. This difference reflects how AC and DC current behave during interruption.
In practice, a solar combiner box works much like a junction box, but with added protection and organization. Multiple cables enter through dedicated ports, then are grouped into a more manageable output circuit. The layout reduces the number of separate connections at the inverter and fuse terminals. It also makes installation, troubleshooting, and routine maintenance easier because technicians can identify each string connection in one centralized location.
Send us your system voltage, number of strings, and protection requirements.
Our team will recommend a suitable configuration and provide a fast quotation.
Our 1,160 m² sales office area houses the product showroom, technical support team, and export documentation department. Buyers can review products, discuss specifications, and coordinate orders in one location.
Permanent facility with the GA&DA logo front and center — a fixed address, registered capital, and 16+ years of operational history you can verify on-site or via video call.
The full GA&DA product range on display — combiner boxes, SPDs, circuit breakers, and fuses mounted on showcase walls with the16+ year heritage screen. Inspect every model in one visit.
Every certification we hold — UL, CE, CB, TUV — displayed physically in our showroom. Buyers can review the originals on site.
Every catalog model from combiner boxes to fuses — one wall to confirm we carry the full lineup your project requires.
Sales, R&D, and export teams sit side by side — your inquiry moves from quote to technical drawing without handoff delays.
Every visiting buyer is welcomed at the GA&DA reception desk — sign in, meet your account manager, and start the product review.
Equipped with advanced production lines and testing equipment, GA&DA ensures every combiner box meets international safety standards. Our team follows ISO 9001 processes from R&D to delivery.
Dedicated production lines for combiner box assembly, wiring, and enclosure fabrication. Consistent quality through standardized processes.
Skilled technicians assemble DC fuses, breakers, SPDs, and busbars into each enclosure. Every connection torque-checked and documented.
Every unit undergoes continuity, insulation resistance, and dielectric withstand testing. Results recorded and shipped with the unit.
In-house metal stamping and CNC processing for enclosure modification and custom mounting plates. Short lead times for OEM orders.
DC fuses, breakers, SPDs, and enclosures stocked in-house. Ready for assembly without long component lead times.
19,860 m² manufacturing facility with assembly, testing, and warehouse under one roof. Factory visits welcome — video calls available.
Want to see the production floor before placing an order? We schedule factory video calls and on-site visits for serious buyers.
Schedule a Factory VisitOur factory operates under ISO 9001 quality management. Combiner box compliance documentation is available per order — request the specific standards you need.
Factory quality management system — applies to all products
Internal DC fuses, breakers, SPDs carry CE compliance
All internal DC components meet RoHS requirements
Enclosure protection grade tested in-house for every design
Continuity, insulation, dielectric withstand — every unit
CE / TUV / CB documentation available on request
Trusted by solar contractors, distributors, and EPCs across 30+ countries.
"Excellent build quality and consistent performance across every batch. GA&DA has become our go-to supplier for combiner boxes."
"Fast lead times and competitive pricing. The quality easily matches brands costing twice as much. Highly recommended."
"Solid product, zero field failures. Their technical team responded to every question within hours. Truly professional service."
"Premium packaging, no damage on arrival, every single time. Our end customers are impressed with the finish quality."
Send us your system specs — voltage, string count, quantity, destination. You will receive
a quote with model recommendation, pricing, and lead time within one business day.
A PV combiner box combines multiple solar panel strings into one DC output circuit before the power reaches the inverter. It also helps protect the system with fuses, DC circuit breakers, surge protection devices and isolators.
The number of strings depends on the model and project design. Standard configurations commonly support 2 to 24 PV strings, while custom configurations are available for larger solar projects.
Yes. GA&DA can provide PV combiner box solutions for 1000V and 1500V DC solar systems, depending on the selected enclosure and internal protection components.
Yes. Fuses, DC breakers, surge protection devices, isolators, monitoring components, cable glands, wiring layouts and labels can be configured according to your solar project requirements.
Please provide the system voltage, number of PV strings, inverter model, installation environment, preferred enclosure material and any required protection components. Our team will recommend a suitable configuration.
Choose the number of input strings based on your PV array design and inverter configuration. The combiner box should have enough DC inputs for all PV strings, plus properly rated fuses, breakers and surge protection devices. Share your system voltage, string current and inverter details with GA&DA, and we can recommend a suitable configuration.
Yes. GA&DA can customize solar combiner boxes based on your required string quantity, system voltage, enclosure material, IP rating, cable entry position and protection components. Options may include DC fuses, DC MCBs, DC isolators, DC MCCBs and Type 2 surge protection devices.
