Solar Panel Junction Rainproof Box

Product features:

This solar junction rainproof box stands out with its IP68 waterproof rating, which guarantees protection against prolonged water submersion and dust ingress—critical for solar installations in wet or coastal areas. The UV-stabilized PC material is tested to resist yellowing and degradation for over 10 years, ensuring reliable performance in direct sunlight. Its UL94 V-0 fire-retardant rating means it self-extinguishes quickly, minimizing fire risk in case of electrical faults. The 6 terminal pairs support both series and parallel solar panel configurations, accommodating wiring sizes from 10AWG to 14AWG, making it compatible with most residential and commercial solar panels. Integrated cable glands with rubber seals create a watertight seal for each wiring entry point, preventing moisture from entering the box. The tool-free snap-on closure allows for quick access to terminals during installation or maintenance, while the frame-mounted design ensures seamless integration with solar panel arrays. It is certified to IEC and UL standards, ensuring compliance with global solar industry safety regulations.

Product specifications:

Measuring 250mm (width) × 180mm (height) × 120mm (depth), this junction box provides internal dimensions of 230mm × 160mm × 100mm, offering ample space for wiring connections and terminal blocks. It weighs 1.2kg, making it lightweight enough to mount directly on solar panel frames without adding excessive load. The operating temperature range of -40°C to 90°C ensures reliable performance in both freezing winter conditions and scorching summer heat, which is critical for solar panels that often operate at high temperatures. The terminal blocks are made of corrosion-resistant copper alloy, ensuring low electrical resistance and long-term conductivity. Cable entry ports are 8×16mm, with rubber glands that can be adjusted to fit wiring diameters from 8mm to 15mm, maintaining a watertight seal. The fire-retardant PC material meets UL94 V-0 standards, and the box is RoHS-compliant, avoiding harmful substances. Mounting brackets are compatible with solar panel frames ranging from 30mm to 50mm in thickness, ensuring a secure fit on most standard solar panels.

Product application:

This rainproof solar junction box is an essential component for all types of solar energy installations. In residential rooftop solar systems, it protects the wiring connections between solar panels and the inverter, preventing moisture-related electrical faults that can reduce system efficiency. Commercial ground-mounted solar farms use it to organize wiring connections across large arrays, ensuring consistent performance even in heavy rain or snow. Off-grid solar setups for cabins, remote homes, or telecommunications towers rely on it to safeguard critical wiring from extreme weather conditions, ensuring continuous power supply. It is also ideal for solar-powered irrigation systems, solar street lights, and mobile solar charging stations, where junction connections are exposed to outdoor elements. Coastal solar installations benefit from its saltwater-resistant material and IP68 rating, protecting against salt spray and high humidity. Additionally, it can be used in floating solar farms, where submersion in water is a regular risk, thanks to its waterproof design. Its versatile compatibility and robust protection make it suitable for any solar project, regardless of scale or location.