DC Solar Isolator Switch | 1000V, IP66, Double-Break Safety

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Reliable DC Solar Isolator Switch for Safe Photovoltaic Installations

Reliable DC Solar Isolator Switch for Safe Photovoltaic Installations

ZHNYU ELECTRIC’s DC solar isolator switch is engineered for the rigorous demands of modern photovoltaic systems. With over 34 years of manufacturing expertise, we deliver a switch that ensures safe disconnection and isolation of DC circuits, protecting both equipment and personnel. Designed for solar farms, commercial rooftops, and residential installations, our switch meets international standards including IEC and CE, ensuring reliable performance in diverse climates. In a recent solar farm project in Spain, our DC isolators operated flawlessly under high irradiance and temperature variations, achieving zero operational failures over two years. Our switches are rated up to 1000V DC and 32A, providing robust protection for your solar infrastructure.
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Case Study

Solar Farm in Germany Ensures Safety and Compliance

In 2023, a 10MW solar farm in Bavaria required reliable DC isolation to meet stringent safety regulations. By integrating ZHNYU’s DC solar isolator switches into their string combiner boxes, they achieved streamlined maintenance and enhanced safety. Our switches facilitated quick disconnection during grid faults, preventing inverter damage. The farm reported a 30% reduction in downtime and passed all TÜV inspections consistently. This case underscores our switch’s role in safeguarding large-scale PV investments.

Rooftop Installation in Australia Achieves Efficient Operations

A commercial rooftop system in Sydney with 500kW capacity experienced frequent nuisance tripping caused by substandard isolators. After switching to ZHNYU’s DC isolator switches, installation time was cut by 20% due to our compact design. The new switches provided clear visual indication of open/close state, reducing operator errors. Over 18 months, the system reported zero electrical failures and enjoyed lower insurance premiums due to improved safety compliance. This case highlights our product’s adaptability to high-ambient-temperature environments.

Utility-Scale Project in Chile Withstands Harsh Conditions

In the Atacama Desert, one of the world’s driest places, a 150MW plant faced severe UV exposure and sandstorms. ZHNYU’s DC isolator switches, with their robust UV-stabilized enclosure and superior sealing, consistently operated without degradation. The plant achieved a 99.9% availability rate, attributed partly to the reliable isolation provided. Our technical support team provided on-site training, ensuring proper handling. This success has led to repeat orders for additional phases, evidencing trust and performance.

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ZHNYU Electric, with a heritage dating back to 1992, has established itself as a leading manufacturer of low-voltage electrical components. Our DC solar isolator switch is a testament to our commitment to quality and innovation. Each unit is manufactured in our 10,000 square meter facility, equipped with over 100 production machines. We adhere to rigorous quality control processes, from raw material screening to final testing. Our production lines integrate automated testing stations that check insulation resistance, contact resistance, and dielectric withstand, ensuring every switch meets high standards. 

Frequently Asked Questions

What is the main function of a DC solar isolator switch?

The switch safely disconnects DC circuits for maintenance and emergency shutdown, preventing electric shock and equipment damage.
Our switches are certified to ISO9001, CCC, CE, and comply with RoHS, ensuring global acceptance and quality assurance.
Yes, our switches are versatile, rating from 16A to 63A and 1000V DC, suitable for various system sizes from small homes to large farms.
Our enclosure is IP66 rated, and we use UV-resistant materials, making it suitable for harsh environments like deserts or coastal areas.

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Customer Testimonials

Miguel Herrera

We have been using ZHNYU’s DC isolators for our utility-scale projects for two years. The switches have never failed, even under extreme temperatures in desert climates. Their quick-connect feature has significantly reduced installation time.

Emily Stone

Switching to ZHNYU was the best decision. The product quality is outstanding, and their technical support helped us integrate seamlessly. Since then, we have seen a 25% decrease in maintenance costs.

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Advanced Safety Features Ensure Complete Protection

Advanced Safety Features Ensure Complete Protection

ZHNYU’s DC solar isolator switch integrates a patented double-break contact structure and an optimized arc-extinguishing chamber to safely suppress high-voltage DC arcs. Featuring a dielectric strength up to 1500V and clear visual state indicators, it protects personnel during maintenance and prevents equipment damage during grid faults. Tested through 1,000+ full-load switching cycles, it provides dependable electrical safety.
Cost-Effective Solution for Long-Term Operations

Cost-Effective Solution for Long-Term Operations

Designed with contact resistance below 50 milliohms, our DC isolator switch minimizes energy dissipation and thermal output. The robust IP66 housing eliminates the cost of auxiliary protection boxes, while a 10,000-cycle mechanical lifespan drastically lowers maintenance frequency. With a proven 0.1% field failure rate, ZHNYU delivers higher operational uptime and superior long-term project ROI.
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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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