We are LETOP, a professional Solar Combiner Box manufacturer. We have been deeply involved in the industry for 15+ years. With excellent R&D strength and advanced production technology, we provide high-quality and high-performance photovoltaic combiner box & related components to global customers. We are particularly good at providing highly customized combiner box solutions according to your specific project needs, from system voltage to intelligent monitoring, to ensure that each combiner box can perfectly match your photovoltaic system to achieve optimal performance and cost-effectiveness. Choose us, choose customization and reliability.
LETOP offers multiple series of solar combiner boxes, with each series specifically designed for specific installation conditions and common layouts. No matter under what conditions your solar project is used, it will become easier and more efficient.
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.
LETOP provides OEM custom services for PV combiner boxes. Our experienced engineers are here to assist you configure and design the best combiner box solutions in a timely manner. Customization options include enclosure types, string numbers, current ratings, system voltage, protection types, switches, input connection types, overvoltage protection, and monitoring systems, as well as custom packaging and labeling. We also offer complete technical support, including installation guidance, personnel training, and sample validation. Leveraging our advantages in the global photovoltaic industry, we ensure not only high-quality products but also optimized cost efficiency for you.
Common voltages are 600V, 1000V, and 1500V. This will determine the selection of internal components and the overall design.
You can choose isolator switch or DC circuit breaker to provide different protection and operation methods.
Determine if you should integrate anti-reverse diodes based on your system configuration and safety requirements.
Support remote data acquisition, operating status monitoring, and fault diagnosis to improve the level of intelligent management of the system.
Choose MC4 connector or PG waterproof connector according to your cable interface to ensure convenient and safe connection.
Provide multiple options such as stainless steel or plastic ABS/PC to meet different environmental and budget requirements.
As a partner of engineering installers and electrical wholesalers, LETOP takes modular design + flexible supply chain as the core to help you quickly respond to end-customer needs and seize market opportunities. We fully understand the uniqueness of each photovoltaic project and provide a full range of customized services to ensure that the combiner box system is best matched with your specific application scenario. With rich customization experience and a strong engineering team, we are able to quickly respond to customers’ customization needs while ensuring excellent quality. Sample development usually takes only 1 week to complete, and the mass production cycle only takes 4 weeks.
We accept CAD files in various formats. Project information should at least include the number and parameters of PV modules, the number and parameters of inverters. All your files are protected by a confidentiality agreement.
You will receive a design plan and quote from the LETOP expert team within 24 hours. We will propose cost-saving improvements and recommend the most reasonable and efficient solution.
Based on your feedback, we will assist you in further modifying and optimizing the solution to better meet your actual needs and reduce BOM costs, ensuring that the project is efficient and cost-controlled.
Samples are completed within 7 days and shipped by international express. The first order will be completed within 30 days (within 500 units). 100% product inspection before shipment.
– Expert team creates customized solutions in short time
– 24/7 technical consultation, solution optimization, and after-sales support
– Excellence in automated manufacturing with quick turnaround time
LETOP has rich experience in manufacturing and designing in the DC field, 5 experienced engineers, 100 professional assembly workers, 20 production lines and a 22,000 square meter production workshop.
Our combiner boxes are carefully optimized to meet the unique requirement of photovoltaic systems. We also improve solutions for your business models to meet their specific needs. Every customer is of utmost importance to us!
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 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.
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.
Here you can find some of your common questions related to Solar Combiner Box, which can help answer your doubts.
We offer a variety of solar combiner boxes, including DC and AC. DC combiner boxes cover 1-24 input channels, support 600V/1000V/1500V system voltage, and current range 10A-400A. AC combiner boxes support low-voltage and medium-voltage applications. All products can be customized according to customer needs, including shell material, protection level, monitoring function, etc. Detailed specifications can be obtained by downloading our product catalog or contacting the sales team.
The solar combiner box is a key component in a photovoltaic system. Its main function is to bring together multiple photovoltaic string cables and provide necessary protection functions. It not only simplifies system wiring, but also provides overcurrent protection for each string through fuses or circuit breakers, and integrates lightning arresters to protect the system from lightning damage. Advanced combiner boxes may also include monitoring functions to track the performance data of each string.
Our PV combiner box have obtained multiple international certifications, including ISO 9001:2015 quality management system certification, CE, TÜV certification, etc. We strictly produce each product in accordance with international standards to ensure its compliance and safety in the global market.
The delivery cycle for standard products is usually 2-3 weeks, and customized products require 3-6 weeks depending on the complexity. For customized products, the minimum order quantity is usually 10-20 pieces, depending on the degree of customization. We can provide more competitive prices and priority production arrangements for large-volume orders. We understand the importance of project time and will do our best to meet customer delivery requirements.
There are several key factors to consider when choosing a suitable combiner box: system voltage (600V/1000V/1500V), string mode, number of input channels required, current per string, installation environment (indoor/outdoor), whether anti-reverse function is required, and whether communication monitoring function is required. Our technical team can help you choose or customize the most suitable combiner box solution based on the photovoltaic system design drawings and project requirements you provide.
The cooperation process is very simple: first, you can contact our sales team through the website contact form, email or phone; then, provide your basic project information and technical requirements; our technical team will evaluate the requirements and provide suitable product recommendations and quotations; after confirming the order, we will arrange production and provide a detailed delivery plan; after the product is completed, we will conduct comprehensive testing and provide test reports; finally, arrange shipment and provide necessary installation and technical support. For new customers, we also welcome small batch trial orders to verify product quality and service.
Yes, our products are designed for use in a variety of climatic conditions. The standard outdoor series has an IP65/IP66 protection rating and an operating temperature range of -40°C to +85°C. For special environments, such as coastal, desert or high altitude areas, we offer enhanced designs, including special anti-corrosion materials, enhanced heat dissipation structure and UV protection treatment to ensure reliable operation in harsh environments.
We provide a 3-year standard warranty for all products, which can be extended to 5 years. Our technical support team can provide installation guidance, troubleshooting and maintenance advice. We have established a complete after-sales service system to ensure that customers receive timely and effective support.
Our solar combiner box is designed as a low-maintenance product. The recommended maintenance includes: a visual inspection every 6 months to confirm that the seal is intact; an annual check of the tightness of all electrical connections; and a lightning arrester and fuse function test every 2-3 years. In dusty or corrosive environments, more frequent inspections may be required. Each maintenance should be recorded and archived, and we can provide detailed maintenance guides and training.
Yes, our product design ensures compatibility with mainstream inverter brands on the market, including SMA, Huawei, Sungrow, ABB/FIMER, etc. For the compatibility requirements of specific models, our engineers can provide detailed technical evaluation and interface design. In addition, we can also customize product interfaces and communication protocols according to customer-specified equipment requirements to ensure seamless integration of system components.
If no relevant issues are found, please contact us, E-mail:info@letopv.com.
