Solar Array DC Isolator | 1500V, IP66, CE Certified

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Solar Array DC Isolator – Safe Disconnection for Photovoltaic Systems

Solar Array DC Isolator – Safe Disconnection for Photovoltaic Systems

ZHNYU ELECTRIC's Solar Array DC Isolator ensures safe maintenance and emergency shutdown in photovoltaic systems. With over 34 years of low-voltage electrical manufacturing expertise, our DC isolators are engineered for reliable performance in solar arrays, handling up to 1500V DC and current ratings from 16A to 125A. Certified to ISO9001, CCC, CE, and RoHS, they are trusted across 60+ countries. Integrated into PV combiner boxes and inverter DC sides, they provide a clear visible break, reducing arc flash risks. In Europe's aggressive solar expansion, our isolators have enabled 99.9% uptime in utility-scale plants. Tested for 10,000 mechanical operations, they withstand harsh environmental conditions. Our factory, spanning 10,000 square meters with 100+ production equipment, ensures high precision. For detailed specifications and custom solutions, contact us.
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Case Study

Utility-Scale Solar Farm in Germany

A 50MW solar farm in Bavaria required DC isolators that could handle frequent switching for maintenance and comply with stringent German safety standards. ZHNYU's DC isolators, rated at 1500V and 100A, were installed in each array combiner box. The isolators' robust design and reliable arc suppression reduced downtime by 30%. After two years, the farm reported zero switch failures, ensuring continuous energy generation. This case underscores our product's capacity to enhance operational safety and efficiency in large-scale PV plants.

Offshore Solar Installation in Japan

An offshore PV installation in Japan faced challenges with corrosion and moisture. Our DC isolators, featuring IP66-rated enclosures and corrosion-resistant materials, were selected. The isolators provided safe disconnection for maintenance teams, even in harsh marine conditions. Over 18 months, the installation maintained 99.95% availability, and the isolators required no maintenance, cutting operational costs by 20%. This project demonstrates adaptability to extreme environments and commitment to reliability.

Commercial Rooftop Solar in Australia

A commercial rooftop system in Sydney needed flexible DC isolation for a 500kW array. Our isolators were integrated into a smart monitoring system, allowing remote shutdown. This feature enhanced safety for firefighters and maintenance personnel. The client reported a 25% increase in system efficiency due to decreased downtime for servicing. With a lifespan expectancy of 25 years, our isolators proved cost-effective. This case exemplifies how our product supports modern, smart solar installations.

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ZHNYU ELECTRIC, founded in 1992, has established itself as a leader in low-voltage electrical components. With a specialization in solar array DC isolators, we bring three decades of manufacturing excellence to the renewable energy sector. Our production floor, spanning 10,000 square meters, houses over 100 state-of-the-art machines, enabling precision engineering and mass customization. We invest heavily in R&D, ensuring our products meet the evolving demands of solar installations worldwide. For instance, our DC isolators are rated up to 1500V DC, a specification essential for modern high-voltage PV systems. They undergo rigorous testing, including temperature cycling, humidity exposure, and mechanical endurance of 10,000 operations, guaranteeing long-term reliability.

Frequently Asked Questions

What is a solar array DC isolator and why is it necessary?

A solar array DC isolator is a manually operated switch that disconnects DC power from solar panels for safety during maintenance or emergencies. It is necessary to protect technicians and equipment from electric shock and to enable safe shutdown. It is a mandatory safety requirement in many countries, such as Australia and the UK, for instance.
The number of poles depends on the system design. Typically, a single-string system uses 2-pole (double-pole) isolators for positive and negative lines. A multi-string system may require 4-pole (quad-pole) or more to isolate multiple circuits. Solar array DC isolator ratings can go up to 1000V or 1500V, depending on the system voltage.
DC isolators are specifically designed to interrupt direct current, which does not naturally cross zero, making extinguishing arcs more challenging. They have special arc-extinguishing mechanisms. AC isolators handle alternating current. Therefore, you cannot use an AC isolator in a DC circuit.
Yes, our solar array DC isolators come in various IP ratings. For outdoor use, opt for a model with IP66 rating to resist water and dust. Always check the product datasheet for suitability in specific environmental conditions.

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Customer Testimonials

Carlos Méndez
Reliable and Certified Performance

We have integrated ZHNYU solar array DC isolators into our commercial solar installations across Spain. Their 1500V rating and IP66 enclosure are perfect for our harsh coastal environments. Since 2018, we've used over 10,000 units with zero failures. The visible break ensures safety for our technicians. Highly recommended!

Emma Thompson
Excellent Customization and Support

For our utility-scale projects in Australia, we needed custom padlockable handles. ZHNYU provided modified units in just 4 weeks, meeting our tight deadline. Their team helped with technical specifications and our QA passed easily. The isolators have been operational for a year, reducing our maintenance time by 20%.

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Safety First – Certified Reliable Isolation

Safety First – Certified Reliable Isolation

The Solar Array DC Isolator from ZHNYU is meticulously engineered for maximum safety. It ensures that during any maintenance or emergency, the DC side of the solar array is completely isolated, preventing the risk of electric shock. Our isolators are tested to withstand arcing, as we meet IEC 60947-3 standards, and they are CE certified. They feature a clear visible break, which guarantees that the circuit is open and safe for personal intervention. In European markets, where stringent safety directives are enforced, our isolators have been instrumental in achieving zero-accident records. For example, a Spanish engineering firm integrated our isolators into over 500 rooftop installations and reported a 100% safety compliance rate during audits.
Unmatched Durability for Harsh Environments

Unmatched Durability for Harsh Environments

Our Solar Array DC Isolators are built to endure the harshest environmental conditions. With an IP66 ingress protection rating, they are dust-tight and protected against powerful water jets, making them ideal for rainforest, marine, and desert locations. The housing is constructed from UV-stabilized polycarbonate, which retains mechanical strength over time. Internally, silver-alloy contacts reduce corrosion and maintain low resistance, even in high-humidity environments. We have conducted accelerated lifespan tests, simulating 25 years of operation, and our isolators maintained their performance with contact resistance < 0.5mΩ.
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ZHNYU ELECTRIC provides certified low-voltage electrical components—including isolating switches, MCCBs, ACBs, ATS, and DC fuses—for power, industrial, and photovoltaic applications. ISO9001, CE, CCC, RoHS compliant. Serving 60+ countries. Partner with us today.ZHNYU ELECTRIC, founded in 1992, is a professional manufacturer integrating R&D, production and sales of low-voltage electrical components and accessories.

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