1000VDC Photovoltaic Combiner Box: Efficient and Stable

I. Ultra-High Capacity String Connection to Meet System Expansion Needs
The Bangzhao PVB series combiner boxes support simultaneous connection of 8 to 28 PV strings, with a single unit capable of covering the DC bus requirements for medium to large-scale PV systems. This design not only reduces equipment quantity and installation space but also minimizes line losses through a modular wiring structure. It ensures the DC transmission path from strings to inverters remains consistently efficient and unobstructed, while providing ample redundancy for future system upgrades.

II. Weather-Resistant Materials and Craftsmanship Ensure 20 Years of Long-Term Operation
DC circuits utilize high-voltage, high-temperature silicone cables validated through rigorous aging tests to maintain stable performance for over 20 years. Insulation integrity remains unaffected even in outdoor environments characterized by high temperatures, humidity, and intense UV exposure. Exposed metal components are encased in PVC protective panels, eliminating accidental electrocution risks while enhancing equipment aesthetics through streamlined design—achieving dual improvements in functionality and visual appeal.

III. Comprehensive Safety Protection System: Fortifying Operational Security Barriers
The device incorporates built-in DC lightning protection modules and reverse current protection modules, capable of withstanding direct lightning strikes and induced lightning surges while preventing reverse current flow into components that could cause damage. A dual overcurrent protection mechanism combining DC fuses and DC circuit breakers achieves millisecond-level disconnection during short circuits, overloads, and other abnormal conditions. Paired with an IP54-rated enclosure, it effectively blocks rain, snow, and dust ingress, ensuring continuous and stable operation in harsh environments like salt fog and sandstorms.

IV. Innovative Thermal Design for Extended Module Lifespan
Features a large 260×180×40mm heat sink with a blackened surface finish, ensuring no fading or corrosion for 20 years of service. The unique thermal structure and aerodynamic flow channel design maintain heating components within safe temperature thresholds, preventing accelerated aging of power devices due to overheating. This significantly extends the lifespan of both the power modules and the entire combiner box.

V. Compact Structure and High Protection Rating for Outdoor Installation
The compact design optimizes equipment volume while ensuring electrical clearances and creepage distances meet safety standards, facilitating rapid installation on rooftops, ground surfaces, mountainous terrain, and other environments. IP54 protection rating guarantees reliable operation during heavy rain, dust storms, and similar weather conditions. Combined with anti-corrosion coating and UV-resistant housing materials, it meets long-term operational demands in coastal, high-altitude, and other specialized environments.