EC1A Junction Box + EC03 Junction Box with Diode 1

EC1A Junction Box + EC03 Junction Box with Diode 2

EC1A Junction Box + EC03 Junction Box with Diode 3

EC1A Junction Box + EC03 Junction Box with Diode

Enhanced Fault Tolerance: The integration of bypass diodes in the EC03 Middle Junction Box significantly improves system resilience by preventing power loss and hot-spot damage in large-scale PV arrays.
Modular Scalability: The paired EC1A and EC03 design enables cost-effective, phased expansion for projects of varying sizes, maintaining optimal performance from small to large installations.
Robust Durability: Built with copper/tin-plated contacts, IP67 protection, and UL94-V0 flame resistance, both junction boxes ensure reliable operation in harsh environments (-40℃ to +85℃).
Optimized Energy Harvest: The bypass diodes in EC03 minimize energy loss during partial shading, maximizing overall system efficiency and yield.
Streamlined Cost Management: The diode-free EC1A maintains affordability for small panels, while the EC03 adds protection only where needed, balancing cost and performance.

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Product Introduction

NSPV's EC1A Junction Box is a specialized two-part connector solution designed specifically for small-scale solar panels, where cost-efficiency and compact design are paramount. Initially developed without integrated diodes to maintain a streamlined and economical profile suitable for smaller photovoltaic (PV) systems, the EC1A focuses on providing reliable electrical connections with minimal component overhead.

In response to evolving market needs and customer feedback regarding the scalability and protection requirements of larger PV installations, NSPV has strategically enhanced its product offering by introducing the EC03 Middle Junction Box as a complementary component. The EC03 is engineered to integrate seamlessly into the middle sections of expansive photovoltaic arrays, featuring built-in bypass diodes that play a critical role in system resilience.

Product Specifications

Rated Voltage	1500V DC
Rated Current	15A–20A (model-dependent)
Test Voltage	8kV (50Hz, 1min)
Contact Resistance	≤0.25mΩ
Cable Cross-Section	1.5–16mm² (16–6AWG)
Operating Temperature	-40°C to +85°C (IEC standard)
Contacts	Copper with tin plating for corrosion resistance
Insulation	PPE/PA (flame-retardant, UV-stabilized)
Safety Class	II (double insulation)

EC03 Middle Junction Box:

Versatile Configurations: Available in multiple configurations including Edge Negative (EC03N-xx), Edge Middle (EC03M-xx), Edge Positive (EC03P-xx), and Edge Middle with Twin Cable (EC03MT-xx).
High Current Handling: Rated for maximum currents up to 20A (or 30A with diodes), facilitating efficient power transmission.
Low Contact Resistance: Typical contact resistance of ≤ 0.25mΩ, minimizing power loss.
Integrated Diodes: Each unit includes one diode, enhancing system reliability and protection against reverse current flow.
Easy Installation: Designed for soldering connections, ensuring secure and reliable electrical contacts.

EC1A Junction Box:

High-Quality Materials: Constructed with copper and tin-plated contacts for superior conductivity and corrosion resistance.
Robust Protection: Features an IP65/IP67 protection rating, ensuring resistance against dust and water ingress.
Wide Temperature Range: Operates efficiently in temperatures ranging from -40℃ to +85℃, accommodating extreme climatic conditions.
High Voltage and Pulse Resistance: Rated for 1000V & 1500V DC and capable of withstanding rated impulse voltages up to 16KV.
UV Resistant: Designed for outdoor use with UV-resistant properties (F1), ensuring longevity under prolonged sun exposure.

Advantages

Enhanced Durability: Both junction boxes are built with high-quality, corrosion-resistant materials and are rated for extreme temperatures, ensuring long-term performance and reliability.
Superior Protection: With IP65/IP67 ratings, these junction boxes provide excellent protection against environmental factors, reducing maintenance costs and downtime.
High Efficiency: Low contact resistance and high current handling capabilities maximize power transmission efficiency, improving overall system performance.
Versatility: The EC03 Middle Junction Box's multiple configurations accommodate various PV system designs, enhancing flexibility and ease of integration.
Safety Compliance: Meeting stringent safety standards (e.g., UL94-V0 flame class), these junction boxes ensure safe operation in residential, commercial, and industrial PV installations.

Application

The NSPV EC1A Junction Box + EC03 Middle Junction Box Set is ideal for a wide range of PV applications, including residential rooftop systems, commercial building integrations, and large-scale solar farms. Their robust design, high efficiency, and versatility make them a preferred choice for installers and system designers seeking reliable and cost-effective solutions for their PV projects.

FAQ

Q1: Can the EC1A Junction Box be used in residential PV systems?

A1: Yes, the EC1A Junction Box is suitable for both residential and commercial PV systems due to its robust design, high voltage rating, and excellent environmental protection.

Q2: What is the maximum current rating for the EC03 Middle Junction Box?

A2: The EC03 Middle Junction Box is rated for maximum currents up to 20A (or 30A with diodes), depending on the specific model.

Q3: Are these junction boxes compatible with all types of PV modules?

A3: While designed primarily for double-glass PV modules, the versatility of the EC03 Middle Junction Box allows for compatibility with various module types, subject to proper configuration and installation.

Q4: How do these junction boxes ensure safety in PV systems?

A4: Both junction boxes meet stringent safety standards, including flame resistance (UL94-V0) and high impulse voltage ratings, ensuring safe operation even under adverse conditions.

Q5: Can the EC1A Junction Box withstand extreme weather conditions?

A5: Yes, the EC1A Junction Box is designed to operate efficiently in temperatures ranging from -40℃ to +85℃ and features UV-resistant properties, making it suitable for extreme weather conditions.

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