Solar Combiner Box
Whether it is a residential, commercial or industrial project, LETOP can customize solar combiner box to help you succeed.
Custom Solar Combiner Box Manufacturer
LETOP provides solar combiner box Turnkey solutions, which are complete, pre-wired and certified string combiner boxes that meet various installation requirements. Customization options include enclosure types, string numbers, current ratings, system voltage, protection types, disconnect switches, input connection types, overvoltage protection, and monitoring systems, as well as custom packaging and labeling.
With years of experience in DC engineering, we not only perfectly match your technical specifications but also offer flexible solutions based on your budget, providing the most competitive solutions for your projects.
Currently, LETOP has served PV projects in over 50 countries, becoming the preferred partner for many renowned PV power stations, system integrators, and installers. Through LETOP’s comprehensive solutions, you can not only maximize system power generation efficiency but also significantly improve overall system safety and stability, thereby maximizing return on investment.
600V DC Combiner Box – Basic Configuration
600V DC combiner box is LETOP’s economical solution designed for small PV systems. It offers 1-2 string inputs and 1-2 string outputs. Supports 600V DC system voltage. It also uses high-quality components to ensure overcurrent and overvoltage protection. Suitable for 5kW-10kW small residential rooftop or small commercial PV systems.
Single String Solar Combiner Box 1 in 1 out
- 1 String Input 1 String Output.
- 600V/16A Rated Current (optional)
- Dual Protection with DC SPD + Fuse
- Impact-Resistant Polycarbonate Enclosure
- IP65 Waterproof + IK10 Impact Resistance
- IEC 60947-2 and IEC/EN 61643-31 Standards
2 String Solar Combiner box 2 in 1 out
- 2 String Input 1 String Output
- 600V 32A Maximum Current (optional)
- 40kA Short-Circuit Current Capacity
- Dual-Specification Interface PG09/PG21
- Wide Operating Temperature Range -20℃~+60℃
- Suitable for Altitudes up to 2000m
2 String Solar Combiner Box 2 in 2 out
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2 string input 2 string output
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Supports Dual MPPT Independent Control
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Dual Protection with DC Circuit Breaker + DC Fuse
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IP 65 Weatherproof Thermoplastic Enclosure
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CE Anti-Arc Design
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Quick Wall-Mount Bracket Installation
1000V DC Combiner Box – Medium Configuration
1000V DC combiner box is designed for professional combining solutions. Supports 1-4 string inputs and 1-3 string outputs. Maximum support for 1000V DC system voltage. IP65 protection rating and optimized heat dissipation design ensure your system operates stably in complex environments. You can also choose optional smart monitoring system. Fully meets the requirements of 20kW-50kW large residential rooftop and commercial rooftop PV projects.
1 String DC Combiner box 1 in 1 out
- 2 Strings Input 1 String Output
- Support 1000V DC System
- Equipped with 10×38mm Fuse
- Equipped with DC Circuit Breaker +DC SPD
- TÜV / CE Certification
- PG09 / PG21 Cable Gland
2 String DC Combiner box 2 in 1 out
- 2 Strings Input 1 String Output
- 32A Rated Current
- Optimized Heat Dissipation Enclosure
- Integrated Maximum Power Point Tracking
- IP65 Protection Rating
- Operating Temperature -20℃ to +60℃
2 String DC Combiner box 2 in 2 out
- 2 Strings Input 2 String Output
- Dual Independent MPPT Optimization
- Independent DC Circuit Breaker for Each Route
- 2000m Altitude Operation
- Equipped with 10×38mm Fuse
- Compliant with IEC 60947-2 Standard
3 String DC Combiner box 3 in 1 out
- 3 Strings Input 1 String Output
- Maximum 50A Continuous Output Current
- Equipped with PV Dedicated DC MCB+SPD+Fuse
- Compact Structure Optimized Space Layout
- IP65 Polycarbonate Enclosure
- Operating Temperature -20℃ to +60℃
3 String DC Combiner box 3 in 3 out
- 3 Strings Input 3 String Output
- 1000V Single Route 16A Rated Current (Optional)
- 388×393×120mm Large Capacity Enclosure
- Each Route Equipped with DC MCB+SPD+Fuse
- IP65 Polycarbonate Enclosure
- Support Quick Wall Mounting
4 String DC Combiner box 4 in 2 out
- 4 Strings Input 2 Strings Output
- 1000V Single Route 32A Maximum Current
- Dual MPPT Independent Connection
- IP65 Polycarbonate Enclosure
- Stable Operation in 9% Humidity Environment
- Operating Temperature -20℃ to +60℃
4 string PV Solar Combiner Box 4 in 2 out
- 4 Strings Input 2 String Output
- Maximum 63A Output Current (optional)
- Equipped with PV Dedicated DC MCB+SPD+Fuse
- Compact Structure Optimized Space Layout
- IP65 Polycarbonate Enclosure
- Operating Temperature -20℃ to +60℃
4 String DC Combiner box 4 in 2 out
- 4 Strings Input 2 String Output
- 1000V Single Route 63A Rated Current (Optional)
- Large Capacity Enclosure
- Each Route Equipped with DC MCB+SPD+Fuse
- IP66 Stainless Steel Enclosure
- Support Quick Wall Mounting
6 String DC Combiner box 6 in 2 out
- 6 Strings Input 2 Strings Output
- 1000V 63A Maximum Current (optional)
- Dual MPPT Independent Connection
- IP65 Polycarbonate Enclosure
- Stable Operation in 9% Humidity Environment
- Operating Temperature -20℃ to +60℃
1500V DC Combiner Box – Large Configuration
1500V DC combiner box is a professional solution tailored for large ground power stations. The combiner box supports a maximum of 24 string configurations, it is suitable for 1500V DC system voltages. It features industrial-level protection design, including string monitoring, RS485 bus/standard MODBUS-RTU protocol, arc fault detection, and fast shutdown/fireman switch functions. High-quality components and copper bus materials are used to ensure stable performance. Additionally, intelligent thermal spacing design achieves efficient heat dissipation, further enhancing equipment operational efficiency.
16 String PV Combiner box 16 in 1 out
- 16 Strings Input 1 String Output
- 250A Maximum Current Output
- 1500V Rated Insulation Voltage
- Photovoltaic Dedicated DC Components
- Supports Operation at 2000m Altitude
- TÜV Rheinland + CE Dual Certification
16 string PV Steel Combiner Box 16 in 1 out
- 16 Strings Input 1 String Output
- IP66 Stainless Steel Enclosure
- 250A Maximum Current Output
- 1500V Rated Insulation Voltage
- Supports Operation at 2000m Altitude
- Optional photovoltaic monitoring system
24 string PV Steel Combiner Box 24 in 1 out
- 24 Strings Input 1 String Output
- Supports 1500V DC Voltage
- 10/14×85mm Large Size Fuse Core
- IP66 Water and Dust Protection
- TÜV Rheinland + CE Dual Certification
- Optional photovoltaic monitoring system
Reliable Quality
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High-quality PV-specific components and copper busbar materials
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polycarbonate and ABS, painted steel or stainless steel enclosure
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IEC 61439-2/DIN EN 61439 certified
Comprehensive Protection
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Operating temperature range from -20°C to 70°C, heat and cold resistant, UV resistant, suitable for extreme climate conditions
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String, surge, overcurrent, short circuit protection, grounding protection, arc fault detection
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Positive and negative fuse protection, rapid shutdown isolation switch (firefighter switch)
Optimized Design
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IP65/66 high-level protection, dust-proof, waterproof, and anti-corrosion design
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Class II double insulation design, pressure caps and MC4 connectors for both input and output
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Smart thermal spacing and cable layout, compact dimensions, long-term stable operation
Expandable Features
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Modular design, fully expandable
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Optional string monitoring, RS485 MODBUS communication
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Support for additional circuit breakers or second MPPT
Easy Installation
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Direct or MC4 connector DC string connection, Plug-and-Play
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Reduced string connection time, lower on-site construction complexity
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Preassembled string combiner boxes for cost savings, simplified installation, maintenance-free
Made for Your System
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Expert team creates customized solutions in short time
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24/7 technical consultation, solution optimization, and after-sales support
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Excellence in automated manufacturing with quick turnaround time
Application Solution
Our combiner boxes are carefully optimized to meet the unique requirement of photovoltaic systems. We also improve solutions for customers with different business models to precisely meet their specific needs. Every customer is most important to us!
Residential: Ideal Choice for Home Solar Installers
With the rapid growth of global residential solar market, 5-20kW home systems have become a crucial business source for installers. As a professional PV combiner box manufacturer, LETOP understands the challenges installers face in residential projects. Our solutions make your installations easier and services more professional.
Commercial/Industrial: Professional Solutions for C&I Solar Systems
Commercial and industrial solar systems from 20kW to 1000kW are experiencing rapid growth worldwide. As a professional PV combiner box manufacturer, LETOP has ten years of expertise in C&I solar sector, providing safe and reliable product solutions for system integrators and engineering companies.
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Utility-scale: Smart Combining Solutions for Large Solar Plants
As PV generation technology rapidly advances, large-scale ground-mounted plants are evolving towards higher voltage and larger capacity. As a professional PV combiner box manufacturer, LETOP deeply understands the technical challenges that engineering design institutes and EPC companies face in utility-scale projects.
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