Solar Inverter Transformers
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Solar Inverter Transformers are designed to step up the output voltage of inverter-based photovoltaic (PV) systems for efficient transmission and grid integration.
In modern solar power plants, these transformers operate under variable load profiles, harmonic-rich conditions, and continuous daily cycling. Therefore, high efficiency, thermal stability, and harmonic tolerance are critical design factors.
ESTA Solar Inverter Transformers are engineered to ensure maximum performance, low losses, and long operational life in utility-scale and commercial solar energy applications.
Electrical Scope
Power range
100 kVA – 10 MVA
Primary voltage
400 V – 1.5 kV
Secondary voltage
10 kV – 36 kV
Frequency
50 Hz / 60 Hz
Cooling Methods
AN / AF / ONAN
Tap Changer
Off-load tap changer (optional)
Applications
Utility-scale solar power plants
Distributed PV systems
Rooftop solar installations
Solar farms with central or string inverters
Hybrid renewable energy systems
Energy storage integrated solar systems
Design Features
High Mechanical Strength
- Designed for outdoor installation and long-term operation
- Robust structure for transportation and site conditions
- Reliable performance under thermal cycling
Environmental Protection
- C3 / C4 corrosion protection options
- UV-resistant and outdoor-compatible insulation systems
- Temperature and humidity resistant design
Electrical Performance
- Low-loss magnetic core design (EcoDesign compliant options)
- High efficiency under variable load conditions
- Harmonic-resistant winding design for inverter outputs
- High insulation strength
Engineering Capability
ESTA provides:
- Harmonic analysis for inverter systems
- Thermal performance optimization
- Electromagnetic design calculations
- Mechanical integrity validation
- Project-specific FAT procedures
Each transformer is engineered according to inverter characteristics, grid requirements, and site conditions.
Operational Advantages
- High energy efficiency
- Reduced operational losses
- Optimized for inverter-based systems
- Long service life
- Low maintenance requirements
- Flexible design for various solar plant configurations
Reliability for Critical Power Systems
Solar inverter transformers must operate efficiently under fluctuating generation profiles and continuous daily cycles. ESTA designs focus on:
- High efficiency across varying load conditions
- Long operational lifespan
- Reduced thermal stress
- Low failure rates
- Optimized performance for inverter-based systems
Standards & Compliance
Designed and manufactured in accordance with:
- IEC 60076
- Renewable energy and solar standards
- EcoDesign (EU Tier 2)
Project-specific compliance available upon request.
Why ESTA?
Optimized Performance for Solar Energy Systems
ESTA delivers engineered-to-order transformer solutions designed specifically for inverter-based solar systems, ensuring high efficiency, reliability, and compliance with international standards.