H4 PV Connector | Solar Panel DC Connector 1500 V Reliability

The H4 PV Connector is a solar panel DC connector 1500 V solution engineered for long-term reliability in modern photovoltaic systems. Designed for utility-scale solar farms, commercial rooftops, and residential arrays, it delivers stable electrical performance, robust environmental sealing, and globally recognized certifications for demanding DC applications.

As PV architectures move to higher string voltages and more power-dense designs, connectors must handle elevated electrical stresses, thermal cycling, and constant outdoor exposure over decades. The H4 PV Connector combines a proven contact system, rugged housing materials, and compliance with key PV connector standards to help system designers meet these challenges with confidence.

Table of Contents

• Overview
• Key Features & Benefits
• Typical Applications
• Technical Details
• Standards, Compliance & Safety
• Why Choose the H4 PV Connector
• Related Solar Solutions
• Get Support

Overview

The H4 PV Connector supports PV system voltages up to 1500 V DC, enabling longer string lengths and reduced balance-of-system costs. By allowing more modules per string, it helps minimize combiner boxes and cabling, which can lower installation time and overall system complexity.

This single-pole, touch-proof connector is designed for use with common PV cable sizes and insulation types. Its field-proven interface provides secure mating, low contact resistance, and stable performance in harsh outdoor conditions. For OEMs, installers, and EPCs, the H4 PV platform offers a reliable, easy-to-integrate solution for new builds, repowering projects, and service work.

Key Features & Benefits

The H4 PV Connector combines electrical performance, mechanical robustness, and installation efficiency in a compact form factor. Its precision contact system is designed to maintain low resistance over the full life of the installation, helping to reduce losses and heat rise in high-current PV strings.

Dual certifications to major PV connector standards demonstrate compliance with global requirements. The connector is certified to UL 6703 at 1500 V DC and to IEC 62852 at 1000 V DC by UL and TÜV, supporting use in a wide range of markets and geographies. This simplifies product selection for global programs and helps streamline design qualification for OEMs and system integrators.

Rugged housing materials and high-quality sealing components are engineered to withstand UV exposure, moisture, dust, and temperature extremes. Together, these design elements support long-term performance in harsh climates, from desert utility plants to high-humidity coastal installations.

Typical Applications

The H4 PV Connector is suitable for a wide range of DC interconnect points across the PV power chain. Typical applications include module leads, string-to-string connections, homeruns to combiner boxes, and DC inputs to inverters or DC collection hardware.

Utility-scale solar power plants rely on this connector platform for high-voltage string architectures, where long cable runs and elevated current demand stable performance over many years. Commercial and industrial rooftop systems benefit from its compact size, secure locking mechanism, and proven resilience in exposed urban installations.

The connector is also a strong fit for hybrid renewable and energy storage environments, where PV arrays may feed DC-coupled batteries or power conversion equipment. For DC bus connections on battery packs and energy storage cabinets, consider pairing the H4 PV Connector at the array level with SurLok Plus high-current DC connectors for the storage side of the system.

Technical Details

The H4 PV Connector is designed around a single-contact interface with current ratings that support high-output PV strings. Under UL 6703, it is rated up to 15 A with 14 AWG cable and up to 35 A with 12 AWG and 10 AWG conductors. Under IEC 62852 at 85°C, typical current ratings include up to 25 A for 2.5 mm², 41 A for 4.0 mm², and 45 A for 6.0 mm² conductors, helping designers optimize string currents and conductor sizing.

Mechanical performance is tuned for demanding field conditions. The connector supports typical PV cable outer diameters in the 4.5 mm to 7.8 mm range and is qualified for repeated mating cycles, making it suitable for both initial installation and service scenarios. A self-locking, tool-release mechanism helps prevent accidental disconnects and aligns with National Electrical Code (NEC) requirements for PV connectors.

Internally, tin-plated copper alloy contacts and silicone rubber sealing components are housed in a thermoplastic body that has been designed for impact, temperature, and UV resistance. This material system works together to maintain contact force, sealing integrity, and dielectric performance over the life of the installation.

Standards, Compliance & Safety

The H4 PV Connector is qualified to key global PV connector standards, giving engineers and buyers confidence in its safety and reliability. It is certified to UL 6703 for connectors used in photovoltaic systems at up to 1500 V DC, and to IEC 62852 for PV connectors at 1000 V DC by UL and TÜV. These approvals support use in systems designed to North American and international codes.

The connector’s design supports touch-proof operation to help minimize accidental contact with live parts during installation and maintenance. Its locking mechanism is intended to meet NEC requirements for self-locking connectors that require a tool for unmating, reducing the risk of unintentional disconnects in the field.

For engineers and specifiers who need to understand the compliance framework in detail, you can review the UL 6703 standard for connectors used in photovoltaic systems, which defines safety and performance criteria for these latching and locking PV interfaces.

Why Choose the H4 PV Connector

Selecting a proven solar panel DC connector 1500 V is critical for long-term safety and energy yield. The H4 PV Connector offers a combination of high-voltage capability, robust current ratings, and globally recognized certifications that align with modern PV plant requirements. Its contact and sealing system are designed to maintain low resistance and strong environmental protection across many years of operation.

Because the connector supports field assembly using crimp tooling, installers can terminate leads on-site, simplifying logistics and helping reduce installation time. At the same time, the connector is suitable for automated or semi-automated harness production, giving OEMs flexibility in how they manufacture PV assemblies at scale.

Related Solar Solutions & Technical Resources

The H4 PV Connector is part of Amphenol Industrial Operations’ broader portfolio of solar and high-power interconnect solutions. For a deeper technical dive into connector behavior, design considerations, and long-term performance in PV environments, review our dedicated article on solar connector technology.

To explore additional products that support solar power generation, including DC power connectors, cable assemblies, and junction box solutions, visit our Solar market overview page.

For energy storage, EV charging, and other high-current DC applications that complement your PV arrays, consider SurLok Plus compression lug connectors, which provide robust, tool-friendly terminations for battery packs, DC busbars, and power conversion equipment.

Get Support for Your Next PV Project

Whether you are designing a new 1500 V DC solar array, repowering an existing site, or standardizing on a connector platform across multiple projects, the H4 PV Connector offers a proven path to safe, reliable PV interconnections. Contact Amphenol Industrial Operations to review your string design, cable requirements, and certification needs so we can help you specify the right H4 PV configuration for your system.

Reach out to our sales and engineering teams today to discuss your application and learn how the H4 PV Connector can support your next solar installation.