Product Description
        The PV DC combiner box is a critical component in PV systems, comprising the following elements:
        Enclosure: Constructed from aluminum alloy or stainless steel with anti-corrosion coating, rated IP65/IP66 for long-term outdoor use.
        Input Terminals: Each string input features positive/negative terminals, compatible with PV cables (some models include MC4 connectors).
        Fuses/Circuit Breakers: Each input is protected by a dedicated DC fuse (e.g., gPV type) or circuit breaker for overcurrent protection.
        Reverse-Blocking Diodes: Prevent reverse current flow, minimizing hotspot risks.
        Surge Protection Device (SPD): Lightning and overvoltage suppression.
        Monitoring Module (Optional): Integrated Hall-effect sensors for current/voltage measurement, with local display or remote communication (RS485, 4G).
        Main Output Switch: DC circuit breaker for combined output control.

Example Models:
        8-in-1-out: 8 inputs (15A per string), max. 1000V, single output to inverter.
        Smart Version: Equipped with data logging and remote monitoring.

2. Product Functions (Detailed)
        Current Combining: Parallel connection of multiple PV strings to reduce inverter connection points and simplify wiring.
        Overcurrent Protection: Fuses/circuit breakers isolate faulty strings during short circuits or overloads.
        Reverse Polarity Protection: Diodes block reverse current flow during nighttime or system faults.
        Surge Protection: SPDs absorb lightning-induced surges to safeguard downstream equipment.

Real-Time Monitoring (Smart Models):
        Measures per-string current, voltage, and power to detect issues (e.g., shading, open circuits).
        Transmits data via communication protocols for remote diagnostics.

        Insulation Monitoring (High-End Models): Detects DC-side insulation resistance to prevent leakage risks.
        Voltage Isolation: Complies with IEC/UL standards for creepage and clearance distances to prevent arcing.

Key Features
        High Reliability: Industrial-grade components (e.g., Schneider circuit breakers, Phoenix Contact SPDs), service life ≥20 years.
        Modular Design: Quick replacement of fuses and SPDs for easy maintenance.
        Smart O&M: IoT-enabled communication for integration with SCADA systems, enabling fault alerts and performance analytics.
        Certifications: Complies with TUV, CE, and CQC standards; meets IEC 60947 and UL 508 requirements.
        Environmental Resilience: Wide operating temperature range, suitable for deserts, coastal areas, and extreme cold climates.
        Energy-Efficient Design: Low-resistance conductive materials (e.g., tin-plated copper busbars) minimize power loss.

Advantages:
        Reduces system downtime and enhances energy yield.
        Streamlines installation, saving labor and cabling costs.
        Smart models enable digitalized PV plant management.