Solar Transformers
The Solar Transformer is a specialized type of distribution transformer designed to connect photovoltaic (PV) solar power generation systems to the electrical grid. It steps up the voltage from solar inverters to match the grid or local distribution voltage levels, ensuring efficient power transfer, galvanic isolation, and system reliability.
Engineered by BETA Power Controls LLP, Solar Transformers are built to handle non-linear inverter outputs, high harmonic currents, and fluctuating load profiles typical of solar plants. Using high-grade core materials, advanced insulation systems, and precision winding techniques, these transformers ensure maximum energy efficiency, low losses, and long operational life in renewable environments.
Product Details
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Features
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Specification
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Rated Power
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Up to 12.5 MVA (Custom designs up to 33 kV class)
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Input Voltage (Inverter Side)
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380 V / 400 V AC
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Output Voltage (Grid Side)
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6.6 kV / 11 kV / 22 kV / 33 kV
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Frequency
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50 / 60 Hz
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Phase Configuration
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Three Phase (Single Phase optional)
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Vector Group
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Dyn11, Yyn0, or as per system requirement
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Winding Material
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Copper / Aluminum (as per customer requirement)
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Insulation Class
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Class A / F / H
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Cooling Method
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ONAN / ONAF / KNAN / KNAF
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Efficiency
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Up to 99% (depending on kVA rating)
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Ambient Temperature
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Up to 50°C (designed for tropical climates)
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Design Standards
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IEC 60076, IS 1180, EN 50541-1, BIS Certified
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Cooling Medium
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Mineral Oil / Synthetic Ester (Eco-friendly option)
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Key Features
- Multiple Windings (3 / 5) – Enables parallel inverter connections
- High Efficiency & Low Losses – Compliant with IEC 60076 and Eco-Design EN 50541-1
- Compact and Robust Design – For outdoor installations in harsh climates
- High Overload Capacity – Built to withstand variable solar output conditions
- Excellent Thermal & Electrical Insulation – For long life and reliable performance
- Low Noise Operation – Optimized magnetic core with minimal vibration
Quality & Testing
- Oil leakage and pressure tightness test
- Short-circuit impedance and load loss test
- Mechanical vibration and seismic strength test
- Harmonic analysis for inverter duty
- Designed and manufactured 100% in India
- Eco-Design compliant (EN 50541-1)
Applications
- Solar Photovoltaic (PV) Power Plants
- Grid-Connected and Hybrid Solar Systems
- Solar Farms and Microgrids
- Battery Energy Storage Integration
- Inverter-Duty Power Systems
- Commercial and Industrial Rooftop Solar Installations
- Utility-Scale Solar Power Stations
Three Phase Air-Cooled Servo Voltage Stabilizer
Beta Power Controls in India?
17+ Years of Expertise
Industry Leadership & Innovation
Global Quality Certifications
ISO 9001:2015 compliant
Customization
Voltage ranges and models tailored to client needs
High Efficiency
98% energy efficiency, reduces power loss
Global Export Network
Strong presence in Middle East, Europe, Africa & Asia
After-Sales Support
Installation, service, and technical assistance
How to Order from Beta Power Controls?
Frequently Asked Questions
A solar transformer is a step-up distribution transformer that connects the output of a solar inverter (380–400V AC) to the medium voltage grid (up to 33kV).
Solar inverters generate harmonics and fluctuating loads; Solar Transformers are designed to handle these electrical stresses without overheating or losing efficiency.
Input side: 380–400V (inverter side); Output side: 6.6kV, 11kV, 22kV, or 33kV (grid side).
The primary and secondary windings are isolated magnetically, preventing feedback from the grid to the solar inverter.
Yes, multi-winding configurations (three or five winding) allow multiple inverters to connect to a single transformer.