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The SYG6Z Series DC rotary switch-disconnector was selected as the primary DC switching solution for a dual-array solar-plus-storage project in Arizona.
Arizona Solar-Plus-Storage Project: DC Switching for Dual-Array Grid Integration
Sieyuan Electric's SYG6Z Series DC Rotary Switch-Disconnector was selected as the primary DC switching solution for a utility-scale solar-plus-storage project in Arizona, supporting the safe operation of dual solar arrays integrated with battery storage. Operating in one of North America's most demanding desert environments, the project required DC switching equipment capable of withstanding extreme heat, intense UV exposure, and high dust concentrations over a 30-year service life.
Project Overview
The SYG6Z Series DC rotary switch-disconnector was selected as the primary DC switching solution for a dual-array solar-plus-storage project in Arizona.
Project Background
Dual photovoltaic arrays paired with grid-scale battery storage in the Arizona desert.
Key Challenges
Extreme heat, intense sunlight and dust demanding proven DC switching durability.
Sieyuan Solution
A compact 1500 V DC platform proven across PV, storage and data center applications.
Technical Highlights
A visible isolation break for LOTO, 12 kV impulse withstand and high fault resistance.
Project Overview
Project Background
The Arizona solar-plus-storage installation combines dual photovoltaic arrays with grid-scale battery storage, positioned to enhance grid resilience and support the region's growing renewable energy capacity.
Key Challenges
The site operates in a harsh desert climate defined by extreme temperatures, intense sunlight, and elevated dust levels — conditions that demand DC switching equipment with proven environmental durability and long service life. Sieyuan Electric's SYG6Z Series DC Rotary Switch-Disconnector was selected as the project's primary DC switching solution, providing reliable connection, disconnection, and isolation across both the battery storage and solar DC systems.
Sieyuan Solution
The SYG6Z Series is engineered for DC 1500V-and-below applications, with deployment across large-scale energy storage, photovoltaic plants, data centers, and distribution networks. Its compact design, strong electrical performance, and high environmental adaptability make it well-suited for demanding utility-scale installations.
The SYG6Z series is rated for the full range of conditions present at the Arizona site:
- Wide temperature tolerance — Stable operation from -40°C to +70°C, covering year-round extremes in high-temperature desert climates.
- Dust and moisture resistance — IP65-rated enclosure option ensures reliable performance in dusty outdoor and cabinet environments.
- High-altitude capability — Designed for operation up to 5,000 m, supporting diverse regional deployments.
- Durable construction — Robust materials and stringent production controls reduce long-term maintenance requirements.
Technical Highlights
Safety and Reliability
- Visible isolation break — A clear break point satisfies Lockout/Tagout (LOTO) requirements, enabling safe maintenance access.
- Strong insulation performance — 12 kV impulse withstand voltage reduces the risk of flashover and leakage.
- High fault resistance — Rated to withstand short-circuit currents of 20 kA/1s and 63 kA/0.1s, protecting equipment and maintaining system stability under fault conditions.
- Long service life — 10,000 mechanical cycles align with the 30-year operational lifecycle typical of large-scale energy storage projects.
Global Certification and Field Experience
- Certifications — CE, TÜV, UL, AS, and CCC certified; compliant with IEC 60947-3 and UL 98B.
- Proven field performance — Deployed across large-scale storage and photovoltaic projects in North America, Europe, Asia, and Australia.
