Solar Renewable Energy Projects

01-14 2026 | By:

Reliable Solar Transformer Solutions for Utility-Scale PV Projects

Solar photovoltaic (PV) power plants require robust and efficient transformer systems to step up inverter output into grid-compatible voltage levels. ZTelec Yuguang specializes in advanced solar PV transformers and integrated box-type substation solutions designed to deliver high reliability, low losses, and long service life under challenging environmental conditions.

Why Solar Transformers Matter in PV Plants

In a solar array, DC power from PV modules is converted into AC by inverters. Step-up transformers then raise this AC voltage to medium and high voltage levels for collector systems and utility grid integration. Correct transformer sizing and technology selection are critical — undersized transformers reduce plant capacity utilization, while oversized units increase project costs.

Solar transformers must withstand:

• Harsh weather and high ambient temperatures

• Variable load profiles from inverter output

• Harmonic stress from inverter power electronics

• Outdoor installation and exposure conditions

Solar Transformer Classifications

Inverter Step-Up Transformers

Convert inverter AC output (e.g., ~800V–1500V) to 10kV or 35kV for collection systems.

PV Collection Transformers

Step up between medium-voltage levels (10kV / 20kV / 35kV) to higher distribution voltages.

High Voltage Grid Connection Transformers

Designed to step up further to 110kV or above for utility network integration.

Integrated Photovoltaic Box-Type Substations (PV Box Substations)

Modular assembly combining:

• PV transformer

• MV switchgear

• LV distribution & protection

• Remote monitoring & control systems

This integrated design simplifies installation, reduces civil works, and enhances operational safety.

Application Scenarios

ZTelec Yuguang solar transformer products are widely used in:

✔ Utility-scale photovoltaic power parks
✔ Rooftop and distributed PV generation systems
✔ Solar inverter step-up transformer units
✔ Hybrid solar + energy storage installations
✔ Desert, coastal, and high ambient temperature zones
✔ EPC renewable energy projects and turnkey power plants

Typical Technical Specifications

Note: Specifications are customizable based on project requirements and grid code compliance.

Key Design Features for Solar PV Applications

• Harmonic-resistant winding designs to handle inverter output stress

• Low loss cores and optimized cooling for high efficiency

• Strong short-circuit withstand capability for system robustness

• Weather-proof and corrosion-resistant outdoor housings

• Intelligent monitoring & protection for remote operation

Integrated Solar Box-Type Substations

ZTelec Yuguang’s solar box substations integrate transformer and switchgear equipment into compact modular skids:

✔ Pre-engineered layout for reduced site installation time
✔ Factory-tested components for superior reliability
✔ MV & LV switchgear with protection and control
✔ Optional SCADA / remote monitoring systems

Why Choose ZTelec Yuguang

As a global leader in power transformer manufacturing, ZTelec Yuguang delivers industry-leading solutions for renewable energy applications:

✔ Extensive experience in solar and grid integration projects
✔ Custom engineering tailored to site conditions and grid codes
✔ ISO & IEC certified quality systems
✔ Comprehensive testing and factory acceptance reports
✔ Competitive pricing with reliable delivery schedules

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