This PV combiner box offers three key advantages to enhance solar system performance and safety: First, its IP67 protection rating and corrosion-resistant aluminum alloy construction make it suitable for harsh outdoor solar environments, with a polyester powder coating that provides 1500 hours of salt spray resistance, ideal for coastal solar farms and rooftop installations exposed to rain, wind, and UV radiation. Second, it is equipped with advanced protection features, including 12 string fuses (10A each) for overcurrent protection, a 20kA surge protection device (SPD) to guard against lightning strikes, and reverse current diodes to prevent power backflow to PV panels during low-light conditions, effectively reducing equipment failure rates. Third, its efficient cooling system combines natural ventilation vents and aluminum heat sinks, dissipating heat generated by electrical components to maintain optimal operating temperature, ensuring stable power transmission even in high-temperature summer months. Additionally, it features a transparent cover for easy visual inspection of fuse status without opening the enclosure.
This solar PV combiner box meets strict industry standards with precise technical specifications: It supports a rated voltage of 1000V DC and a rated current of 120A, compatible with most commercial and utility-scale solar PV systems. It features 12 PV string inputs, each fitted with a 10A fuse to protect individual strings from overcurrent. The surge protection level is 20kA (8/20μs), providing robust defense against lightning-induced surges. The main body is made of 1.5mm thick corrosion-resistant aluminum alloy, with a polyester powder-sprayed surface that offers 1500 hours of salt spray corrosion resistance. The cooling system includes side ventilation vents and an integrated aluminum heat sink, reducing internal temperatures by up to 15°C compared to standard enclosures. Mounting options include pole-mounted and wall-mounted, with pre-drilled holes for easy installation. It holds certifications such as UL 1741 (grid-connected PV equipment), CE, and IEC 60947-7-2, ensuring compliance with global solar industry safety standards. The operating temperature range is -40°C to +85°C, adapting to extreme climate conditions.
This specialized combiner box is essential for all types of solar PV installations: In rooftop residential solar systems, it aggregates power from 6-12 PV strings, protecting the system from overcurrent and lightning strikes, ensuring safe power transmission to the inverter. In ground-mounted commercial solar farms, its corrosion-resistant construction and high surge protection level make it suitable for large-scale outdoor installations, reducing maintenance costs and improving system uptime. In off-grid solar systems for remote areas, it prevents reverse current flow, ensuring batteries are charged efficiently and reliably. It is also applicable to floating solar projects, as its waterproof and corrosion-resistant design withstands the high-humidity, saltwater environment of reservoirs and lakes. Additionally, it can be integrated into solar-powered water pumping systems, protecting the electrical components that control water pump operations in agricultural and rural settings.
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