PV Array DC Isolator Switch | 1000V, IP65, UL/IEC Certified

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PV Array DC Isolator Switch: Maximizing Solar Safety and Performance

PV Array DC Isolator Switch: Maximizing Solar Safety and Performance

Our PV Array DC Isolator Switch is engineered to meet 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 in solar arrays. The switch is rated for up to 1000V DC and handles currents up to 32A, making it suitable for residential, commercial, and utility-scale installations. Our isolator switches are compliant with IEC 60947-3 and UL 508i standards, guaranteeing reliable performance in diverse environmental conditions. In a recent project, a 5MW solar farm in Germany integrated our switches, resulting in a 20% reduction in installation time due to our compact design and tool-free wiring terminals.
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Case Study

German Commercial Rooftop Project

A German solar EPC company faced challenges with frequent switch failures in a 500kW commercial rooftop installation. The existing isolator switches lacked adequate DC rating, leading to overheating and downtime. They switched to our PV Array DC Isolator Switch, which is rated for 1000V DC and 32A. The installation was completed ahead of schedule due to the switch's compact size and pre-wired terminals. Over 12 months, the system experienced zero switch-related failures, resulting in a 98.5% uptime—a 2.3% improvement over previous performance.

Utility-Scale Solar Farm in Spain

In Spain, a utility-scale solar farm with 8,000 panels needed reliable DC isolation for array-level maintenance. The previous solution had high failure rates due to UV degradation and contact corrosion. Our PV Array DC Isolator Switch, built with UV-stabilized plastics and silver-alloy contacts, withstood the harsh Andalusian climate. The farm's operations manager noted that the switch's double-pole breaking mechanism reduced arc risk, ensuring worker safety. Over 18 months, the switches underwent 200+ operations per month without a single failure. The farm achieved a 99.2% availability, culminating in a 5% increase in annual energy yield.

Residential Solar System in Australia

An Australian solar installer needed a compact yet robust DC isolator for residential installations to comply with strict AS/NZS 5033 standards. Our switch's slim profile allowed for space-saving installations in meter cabinets. The switch's spring-loaded mechanism provided quick and clear ON/OFF indication, which installers found intuitive. Over a year, the installer used our switches in 300+ homes. Feedback surveys indicated a 98% customer satisfaction rate, and the switch's ingress protection rating of IP65 ensured seamless operation in rainy conditions.

Related products

At ZHNYU ELECTRIC, we have been dedicated to the production of low-voltage electrical equipment since 1992, and our PV Array DC Isolator Switch stands as a testament to our manufacturing excellence. With amassed expertise from over 34 years and 100+ production equipment units, we have refined our processes to ensure each switch meets the highest international standards. Our factory, spanning 10,000 square meters, employs advanced injection molding and precision stamping techniques, allowing for tolerance control within ±0.05mm. The production line incorporates automated testing stations that conduct 100% inspection of insulation resistance and dielectric strength, ensuring that every unit leaving the facility is flawless. 

Frequently Asked Questions

What is a PV array DC isolator switch and why is it essential?

A PV array DC isolator switch is a safety device that allows for the safe disconnection of DC circuits between solar panels and the inverter. It is essential for maintenance, emergency shutdown, and fire safety. According to IEC 60364-7-712, a DC isolating point is mandatory for all solar installations. Our switch ensures that you can easily isolate the solar array without exposing technicians to hazardous voltages.
Our PV array DC isolator switch is available in ratings up to 1000V DC and 32A. We also offer variants rated at 500V and 16A for smaller systems. For higher currents up to 63A, we can provide custom solutions upon request. All switches are UL508i and IEC60947-3 certified, ensuring safe operation under full load.
Our switch is built to exceed 10,000 mechanical operations and 6,000 electrical operations at full load. In real-world solar applications, where daily switching may occur, the switch can last up to 20 years or more. We use high-quality silver-alloy contacts that resist pitting and erosion, ensuring consistent performance throughout its lifespan.
Absolutely. The switch is rated with an IP65 protection level when properly closed, making it dust-tight and protected against water jets. The UV-resistant housing prevents degradation from sunlight exposure, and the operating handle remains functional even at -40°C, making it suitable for installations in harsh climates.

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Customer Testimonials

Michael Schneider
Exceptional Reliability in Our European Project

We initially chose ZN's PV Array DC Isolator Switch for a pilot project in Germany, and the results were outstanding. After 12 months, the switch demonstrated zero failures, which is unmatched by our previous supplier.

Sarah Thompson
High Durability in Harsh Australian Climate

We installed the PV Array DC Isolator Switch in a residential solar system in Sydney. The customer had experienced switch failures yearly. After installation, the switch has operated flawlessly for over 18 months, even during heavy rain and scorching heat. The switch's metallic knob doesn't heat up, and it disconnects instantly at 95V DC load.

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Engineered with IP65 and UV-Stabilized Components

Engineered with IP65 and UV-Stabilized Components

The PV Array DC Isolator Switch is crafted with a rugged enclosure that meets IP65, ensuring complete protection against water and airborne dust. The housing is constructed with a specially compounded thermoplastic that exhibits exceptional UV resistance, meaning it won't become brittle or discolor in harsh sunlight. In a year-long study, we observed that switches exposed to industrial UV levels retained 95% of their mechanical strength. This longevity reduces the total cost of ownership for system owners, as replacements become unnecessary. The switch's rubber gaskets are made with EPDM, which resists ozone and weathering, further enhancing its outdoor suitability. For regions with extreme temperature fluctuations, the switch remains dependable because it undergoes thermal cycling tests from -40°C to +85°C.
Unmatched Safety Features with Visual Indication and Lockable Handle

Unmatched Safety Features with Visual Indication and Lockable Handle

Safety is paramount in electrical installations, and our switch delivers with a clear visual ON/OFF indicator visible from a distance. The indicator is color-coded (red for off) and features a fluorescent marking for low-light conditions. The handle can be padlocked in the OFF position, complying with OSHA lockout/tagout procedures—a critical feature for maintenance technicians. Internally, the switch uses a double-breaking contact mechanism that rapidly extinguishes arcs, thereby preventing degradation. Each contact is made of silver-cadmium oxide, known for its high welding resistance. This design has been validated in independent high-voltage labs, where the switch withstood over 10,000 electrical operations at 1000V DC with a load of 10A without failure.