Sohum Industrial Sales Corporation supply Solar Junction Boxes for rooftop solar systems, industrial PV installations, commercial projects, solar farms and module-level applications in West Bengal, Kolkata, Odisha, Chhattisgarh, Bihar, Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura. Our product options can be selected according to the system voltage, current, cable size, number of inputs, enclosure requirement and installation environment.

• Structural Advantages

A well-designed Solar Junction Box combines electrical functionality with protection against the conditions commonly found in solar installations.

• UV-Resistant Housing

The enclosure can be manufactured from suitable weather-resistant insulating materials designed for prolonged outdoor exposure.

• Sealed Cable Entry

Proper sealing around cable entries helps limit the entry of moisture, dust and other contaminants.

• Compact Construction

Module-level junction boxes are designed to occupy limited space on the rear of a solar panel while maintaining adequate electrical clearance.

• Secure Internal Connections

Suitable terminals and contact components help maintain reliable electrical continuity when correctly assembled.

• Bypass Diode Integration

Module junction boxes can incorporate bypass diodes to provide an alternative current path around affected portions of a PV module under certain operating conditions.

• Protection-Oriented Design

For array-level applications, the junction box can be configured with components such as fuses, SPDs and isolators according to the electrical design.

Key Reasons to Choose This Product

• Designed for Photovoltaic Applications

Unlike ordinary electrical enclosures, Solar Junction Boxes are specifically developed around the requirements of PV installations.

• Suitable for Outdoor Conditions

Solar installations are exposed to sunlight, rain, humidity, dust and temperature variations. Appropriate enclosure materials and sealing help the junction box withstand these conditions.

• Supports Organized DC Connections

The box provides a structured arrangement for cable termination and connection, helping keep the DC wiring system organized.

• Flexible Configuration

Different projects may require different input counts, voltage ratings, protection devices and cable-entry arrangements. Configurations can therefore be selected according to the application.

• Easy Integration

Solar Junction Boxes can be incorporated into module, string or array-level electrical arrangements depending on their design.

• Product Dimensions & Ratings

Solar Junction Boxes are available in different dimensions because a compact module box and a multi-string array box have completely different requirements.

Module-Level Junction Box

String / Array Junction Box

Exact dimensions, voltage, current, IP rating and internal configuration depend on the selected model and project specification.

Important Technical Parameters

When purchasing a Solar Junction Box, consider:

• Maximum DC Voltage
  The box should be rated for the maximum voltage of the PV system.
• Operating Current
  Internal contacts, terminals and protection components must be appropriately rated for the expected current.
• Number of Strings
  The input quantity determines the internal arrangement and enclosure size of an array-level box.
• Cable Size
  Cable glands, terminals and connectors must accommodate the specified solar cable.
• IP Protection
  Outdoor PV installations require an appropriate ingress-protection level.
• Temperature Rating
  The product should be suitable for the temperature range expected at the installation site.
• Protection Devices
  Fuses, SPDs and isolators should be included where required by the system design.

Applications Across Industries

• Residential Solar

Used in rooftop PV systems to organize and protect selected module and DC connections.

• Commercial Buildings

Suitable for solar installations on offices, shopping centres, hotels and institutional buildings.

• Industrial Rooftops

Can be incorporated into captive solar systems installed on factories and industrial buildings.

• Solar Power Plants

String and array-level junction boxes can be used to manage multiple PV circuits across large solar installations.

• Solar Manufacturing

Module-level junction boxes form part of the electrical assembly of photovoltaic panels.

• Solar Water Pumping

Suitable configurations can be used in PV-powered pumping systems.

• Infrastructure Projects

Useful for solar installations supporting remote facilities, infrastructure and utility applications.

• Floating Solar

Junction boxes designed with appropriate environmental protection can be considered for floating PV applications.

Manufactured for Reliability

The operating environment of a solar installation can be demanding. A Junction Box may remain exposed to UV radiation, heat, rain, humidity, dust and repeated temperature changes throughout its service life.

For this reason, attention should be given to:

• Enclosure material
• UV resistance
• Sealing quality
• Electrical clearance
• Contact quality
• Cable entry arrangement
• Thermal performance
• Protection rating
• Mechanical strength
• Applicable testing and certification

For PV module junction boxes, IEC 62790 provides requirements concerning construction, safety and testing. For the actual product, customers should verify the manufacturer’s current datasheet and certification for the specific model.

Why Customers Trust Us

We understand that solar projects can involve hundreds or thousands of electrical connection points. A suitable Junction Box therefore needs to be selected according to the actual PV system rather than simply by appearance or enclosure size.

Our Supply Advantages

• Specification-Based Selection
  We focus on voltage, current, cable size, input count and protection requirements.
• Different Configurations
  Customers can enquire about module-level, string-level and array-level solutions.
• Project Quantity Support
  Suitable for rooftop installers as well as larger EPC and solar-farm requirements.
• Custom Requirement Assistance
  Where standard configurations do not meet the project requirement, dimensions and internal arrangements can be discussed.
• Competitive Project Pricing
  Pricing can be optimized according to configuration, quantity and technical specification.
• Solar-Focused Procurement
  Our approach helps customers source junction boxes according to PV-specific requirements rather than using generic electrical boxes.

Why This Product Is the Right Choice

A Solar Junction Box is a relatively small component, but its role in organizing and protecting PV electrical connections is significant.

• It Helps Keep Connections Organized

Instead of leaving multiple cable connections exposed or poorly arranged, the junction box provides a defined connection point.

• It Supports Outdoor PV Installations

With appropriate enclosure and sealing specifications, it can withstand the environmental conditions associated with solar projects.

• It Can Incorporate Protection

Depending on the type, the box can accommodate bypass diodes, fuses, surge protection and isolation components.

• It Supports Different Solar Architectures

From a single PV module to a large solar array, different junction-box configurations are available.

• It Simplifies Maintenance

A properly designed and labelled connection arrangement can make inspection and maintenance more manageable.

Solar Junction Box Selection Guide

Before placing an order, provide:

Get Solar Junction Boxes for Your Project

Whether you need PV Module Junction Boxes, String Junction Boxes or Array Junction Boxes, choosing the correct electrical rating and environmental protection is essential.

We supply Solar Junction Box solutions for projects across:

West Bengal | Kolkata | Odisha | Chhattisgarh | Bihar | Arunachal Pradesh | Assam | Manipur | Meghalaya | Mizoram | Nagaland | Tripura

Build Better Solar Connections

Choose a Solar Junction Box based on system voltage, current capacity, protection requirements, enclosure quality, cable compatibility and project conditions. For quotations, share your required dimensions, voltage, current, input count, cable size and quantity to identify the appropriate Solar Junction Box configuration.