Waterproof Distribution Box for Solar System PV Outdoor Wiring Junction Box
Product Overview
Our Waterproof PV Distribution Box is a critical component for any solar energy installation, designed to act as the central junction for outdoor wiring. Engineered specifically for the Photovoltaic (PV) industry, this enclosure provides a secure, weather-protected environment for DC circuit breakers, surge protection devices (SPDs), and fuse links.
Built to withstand extreme UV exposure and temperature fluctuations, this junction box ensures the long-term safety and efficiency of your solar array, protecting your investment from electrical faults and environmental degradation.
Technical Specifications
| Technical Parameter |
Detail |
| Protection Rating |
IP65 / IP66 (Waterproof & Dustproof) |
| Material |
High-Impact ABS (Base) + Polycarbonate (Cover) |
| UV Resistance |
ASTM D4329 Standard (Anti-yellowing & Anti-cracking) |
| Voltage Compatibility |
Suitable for 400V - 1000V DC Systems |
| Flame Retardancy |
UL94-V0 (Self-extinguishing) |
| Mechanical Impact |
IK08 Rated |
| Operating Humidity |
Up to 95% RH |
Core Features & Engineering Excellence
1. High-Performance UV & Weather Resistance
Solar installations are exposed to the harshest sunlight. Our enclosures are manufactured with UV-stabilized Polycarbonate (PC) covers and high-density ABS bases. This prevents the material from becoming brittle or cracking under long-term exposure to intense radiation and thermal cycling.
2. Specialized PV Sealing Technology
Equipped with a continuous, high-resilience silicone sealing ring, the box prevents the ingress of moisture even during heavy rain or snowmelt. This is essential for preventing corrosion on electrical terminals and maintaining low contact resistance in the DC circuit.
3. Integrated 35mm DIN Rail
The interior features a pre-installed, galvanized steel DIN rail. This allows for the rapid integration of standard solar components, including:
- DC Circuit Breakers (MCB)
- Surge Protective Devices (SPD)
- DC Isolator Switches
- PV String Fuses
4. Transparent Inspection Window
The clear PC cover allows maintenance personnel to inspect the status of breakers and indicators without opening the enclosure, maintaining the internal seal and preventing accidental exposure to live components.
Professional Applications
- Residential Solar Rooftops: Acts as a string combiner box for home energy systems.
- Commercial PV Arrays: Centralized wiring hub for larger solar installations on warehouses or factories.
- Off-Grid Power Stations: Reliable housing for battery charging controls and inverter inputs in remote areas.
- Solar Pump Systems: Protecting power controls for agricultural irrigation systems.
Installation & Maintenance Insights
- Pre-molded Knockouts: Features various sizes of knockouts to accommodate standard PG or Metric cable glands, ensuring a tight seal for cable entry and exit.
- Internal Grounding: Includes dedicated grounding terminals to ensure the entire PV system is safely earthed.
- Standard Compliance: Designed to meet IEC 60670 and CE certification requirements for low-voltage switchgear.
Frequently Asked Questions
Q: Can this box handle 1000V DC solar strings?
A: Yes, the enclosure is designed with sufficient clearance and creepage distances to safely house components rated up to 1000V DC, provided the installed breakers meet those specifications.
Q: Is the transparent cover prone to yellowing over time?
A: No, we use high-grade UV-resistant Polycarbonate that maintains its transparency and structural integrity for over 10 years in outdoor environments.
Q: Does it include the cable glands?
A: Standard shipments include the enclosure and DIN rail. We can provide matched IP68 waterproof cable glands upon request for a complete "Plug-and-Play" solution.