Enterprise-grade Solar Unit Substations are delivered by Xuzhou Tuojie International Trade Co., Ltd. and are designed for easy grid connection. Our ZGS Modular Transformer Series has a small, smart design and works on three phases to make sure there is a steady source of power. We offer substations with capacities ranging from 1 to 40 MVA, voltage changes from 0.69kV to 35kV, and remote SCADA tracking. Our quality management is ISO9001-certified, and we have 18 patents. Our solutions have been trusted on more than 100 major projects, such as solar industrial parks. They cut installation time by 40% while still meeting IP54–65 standards for difficult conditions.
You need more than just equipment. You need a partner who understands your challenges.
Our product integrates transformer units, switchgear, and intelligent control systems in weather-resistant enclosures. This design addresses critical pain points you face daily.
Space Optimization Matters
Your land costs money. Our American-style compact design occupies just one-third the space of traditional European substations. This means lower land expenses and more room for solar panels.
Built for Harsh Environments
Solar farms face extreme conditions. Our units withstand temperatures from -20°C to +60°C. They resist UV exposure, dust storms, and moisture ingress. The IP54-65 protection rating ensures consistent performance.
Installation Speed You'll Appreciate
Time is money in project deployment. Our units arrive fully assembled and factory-commissioned. You'll complete on-site installation in days, not weeks. Foundation requirements are minimal.

Here's what you're getting with our Solar Unit Substation:
| Parameter | Specification |
|---|---|
| Capacity Range | 1-40 MVA |
| Voltage Transformation | 0.69kV to 35kV |
| Insulation Protection | IP54-IP65 |
| Operating Temperature | -20°C to +60°C |
| Dimensions | 6-12m (L) × 2.5-3.5m (W) |
| Cooling System | Forced ventilation with heat exchangers |
| Protection Standard | IEC 62271, IEEE C57.12.28 |
| Lightning Protection | Surge arresters rated 200kA |
| Enclosure Material | Stainless steel 316L, marine-grade aluminum |
| Communication Interface | Fiber optic, SCADA integration |
| Seismic Resistance | Zone 4 specifications |
Remote Control Capabilities
You don't want to send technicians for routine checks. Our "four-remote" functions enable monitoring, control, regulation, and adjustment from your control center. Manual or electric operation provides flexibility when you need it.
Maintenance-Free Operation
Labor costs add up quickly. Our maintenance-free design reduces personnel requirements significantly. The sealed system protects internal components from environmental damage.
Superior Thermal Management
Overheating causes failures. Insulating oil serves dual purposes—cooling and insulation. This ensures stable performance even when ambient temperatures soar above 60°C.
Integrated Protection Systems
Safety cannot be compromised. Our units feature differential relaying, arc flash detection with sub-2ms trip times, and remote racking systems. These minimize personnel exposure during maintenance.
Utility-Scale Solar Farms
Managing 50-1000MW installations requires robust infrastructure. Our substations serve as collection points consolidating power from multiple inverter stations. They handle complex electrical networks spanning hundreds of acres.
Grid stability remains constant through reactive power compensation and voltage regulation. Desert installations benefit from sealed designs preventing sand ingress.
Commercial and Industrial Rooftops
Your 1-10MW rooftop installation needs compact solutions. Our units integrate seamlessly with building electrical infrastructure. They provide grid-tie capabilities and emergency disconnect functionality.
Urban environments demand space efficiency and aesthetic consideration. We deliver both.
Agricultural Agrivoltaic Projects
Dual land use creates unique requirements. Our elevated mounting systems allow farming operations beneath while providing electrical infrastructure. This serves both solar generation and irrigation systems.
Floating Solar Installations
Marine environments are unforgiving. Our marine-grade units withstand continuous moisture, salt spray, and dynamic loading. Enhanced sealing and corrosion protection ensure longevity.
Advanced Production Equipment
We operate 120+ sets of modern machinery. This includes CNC automatic winding machines, static vacuum casting machines, and microcomputer-controlled curing furnaces. Production processes are continuously optimized.
Quality You Can Trust
Every unit undergoes rigorous inspection. From raw material procurement through final delivery, we follow ISO9001 standards. Our "zero defects" philosophy means unqualified products never leave the factory.
Certification Portfolio
Your compliance matters. All products hold ISO 9001, ISO 14001, and OHSAS 45001 certifications. Low-voltage components carry National CCC Mandatory Certification. Switchgear meets IEC 62271 standards.

Technical Team Strength
Innovation drives our development. Our team includes 15 senior engineers, 30+ intermediate technicians, and 17 senior technicians. This expertise translates into 18 patents and counting.
Municipal Infrastructure
We powered Xuzhou Rail Transit Network Control Center with dual-circuit designs ensuring absolute safety. Xuzhou High-speed Railway East Station relies on our solutions for uninterrupted operation.
Industrial Applications
XCMG Group factory upgrades and GCL Photovoltaic Industrial Park trust our technology. Projects were completed ahead of schedule while maintaining exceptional quality standards.
Commercial Developments
From Xinhuai Central Complex to Xuzhou Fantawild Adventure, our substations deliver reliable power. The Tianyu Yayuan project achieved top quality assessment results using our equipment.

Q1: What maintenance do desert installations require?
Desert environments demand quarterly inspections. Focus on air filter replacement, cooling system cleaning, and seal verification. Annual thermographic surveys identify potential issues early. Transformer oil analysis every 2-3 years monitors insulation condition. Monthly external cleaning maintains heat dissipation efficiency per IEEE 40.2 standards.
Q2: How do your substations comply with grid codes?
Our units incorporate automatic voltage regulators and reactive power compensation systems. They meet NERC PRC-024 and similar grid codes. Real-time monitoring maintains power factor within ±0.95 ranges. Capacitor banks provide up to 40% reactive power capability. Verification follows IEEE 519 harmonic standards.
Q3: What protection exists against arc flash incidents?
Safety is paramount. Integrated systems include arc flash detection with sub-2ms trip times and remote racking minimizing exposure. We follow NFPA 70E requirements with detailed incident energy calculations. Arc-resistant switchgear provides 50kA withstand capability per IEEE C37.20.7.
Q4: How do units perform during grid disturbances?
Advanced protection relaying provides selective coordination with upstream devices. Communication-assisted schemes follow IEEE C37.234 standards. Fault ride-through capabilities meet FERC Order 827 requirements. Units maintain operation during voltage dips to 0.15 pu for 0.625 seconds. Anti-islanding protection per UL 1741SA prevents unintentional energization.
Q5: What warranty covers extreme temperature applications?
We stand behind our products. Standard warranty covers manufacturing defects for 24 months. Extended coverage is available for extreme environment applications. Our quality management system ensures components meet rated specifications before shipment.
Q6: Can substations integrate with energy storage systems?
Absolutely. Our designs accommodate battery energy storage integration. This supports microgrid operation and load shifting. Bidirectional power flow management enables grid services and backup capabilities.
Technology First
We invest continuously in R&D. Our 18 patents demonstrate commitment to innovation. You benefit from cutting-edge solutions tailored to renewable energy challenges.
Service Paramount
Your success is our priority. We provide comprehensive support from design through commissioning. Our team assists with product procurement beyond transformers, offering convenient one-stop service.
Proven Reliability
Twenty years of industry experience backs every product. Hundreds of successfully completed projects prove our capability. You're choosing a partner with demonstrated excellence.
Customized Solutions
No two projects are identical. We provide tailored solutions meeting your specific environmental conditions and operational requirements. Whether you're in harsh deserts or coastal regions, we adapt.
Complete Transparency
You deserve honest communication. We provide realistic timelines, accurate specifications, and transparent pricing. No surprises. No hidden costs.

Ready to discuss your Solar Unit Substation solar infrastructure needs? Our engineering team is standing by to provide customized solutions. Email us at tuojie@electricinchina.com to start your project consultation.