Solar PV Junction Box Manufacturer

PV JUNCTION BOX MANUFACTURER FOR RELIABLE SOLAR MODULE CONNECTIONS

A photovoltaic junction box is a core device that connects solar cell modules to external circuits, serving the dual functions of power transmission and circuit protection. It integrates bypass diodes internally to effectively prevent hot spot effects and enhance the module's power output under abnormal conditions such as shading. The housing is typically made of PC/PA composite materials, offering excellent weather resistance, impact resistance, and flame retardant properties, with the product having obtained third-party certifications. The sealing structure design achieves an IP68 waterproof rating, ensuring long-term stable operation in complex outdoor environments.

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TYPES OF SOLAR PV JUNCTION BOX

Split Junction Box

A photovoltaic junction box is a core device that connects solar cell modulesto external circuits, serving the dual functions of power transmission and circuitprotection.

PV ZKPRO 

PV ZK906 

PV ZK78X 

Integrated Junction Box

A photovoltaic junction box is a core device that connects solar cell modulesto external circuits, serving the dual functions of power transmission and circuitprotection.

PV ZK902 

PV JUNCTION BOX OEM AND CUSTOMIZATION SERVICE FOR BRANDING, CABLE LENGTH, AND LAYOUT NEEDS

We offer comprehensive OEM and ODM services to precisely meet your specific project requirements and market differentiation strategies. Whether you need customized dimensions, special colors, specific cable lengths, or dedicated connectors, our engineering team can provide flexible solutions that perfectly align with your brand positioning. From prototype design to mass production, we ensure our products deliver high compatibility and reliability across various photovoltaic applications.

FAQS ABOUT PV JUNCTION BOX

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What model of housing material is used?

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We use PPO, which offers good flowability, high dimensional accuracy, as well as higher mechanical strength and high-temperature resistance, ensuring no aging for 25 years.

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What is the cable specification? Can different lengths be customized?

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The standard configuration is a 4.0 mm² photovoltaic-specific double-insulated cable, with lengths cut according to customer requirements. As an OEM manufacturer, we support customization of cable diameter and specific lengths based on your component layout to reduce waste from on-site cutting.

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Do you support printing our brand logo on the junction box?

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Yes, we do. We offer comprehensive OEM/ODM services, allowing silk-screen logo printing on the box cover and cable glands. Colors and fonts can be customized according to your brand VI to help enhance product recognition.

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Are the connectors MC3 or MC4? Are they universal?

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Currently, all our products come standard with self-developed connectors that are universally compatible with MC4 connectors. The insertion force and contact resistance comply with IEC standards, enabling seamless integration with mainstream photovoltaic cables and inverters, ensuring reliable connectivity and broad compatibility.

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What is the protection rating of the junction box? Can it withstand outdoor heavy rain?

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Our standard products achieve an IP68 protection rating. The connectors feature a silicone seal ring and locking design, which fully prevents water ingress even in harsh outdoor environments.

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What is the maximum system voltage the junction box can withstand?

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Our junction box is designed to be compatible with mainstream photovoltaic systems and can withstand up to 1500V DC. Whether used in traditional 1000V systems or new 1500V high-voltage power stations, it can be safely applied, meeting the stringent electrical requirements of large-scale ground-mounted power plants.