High-Efficiency Solar Inverter Duty Transformers for Global PV Plants
As utility-scale solar installations and commercial photovoltaic projects scale rapidly across the globe, grid connection integrity and power conversion efficiency are paramount. KROS Electric Co., Ltd. manufactures specialized Solar Inverter Duty Transformers engineered to step up variable inverter output voltages to high-voltage grid transmission levels (up to 33 kV). With over 35 years of transformer manufacturing excellence, our products are engineered to withstand complex duty cycles, severe ambient temperature fluctuations, and high-frequency harmonics inherent in modern solar power inverter systems.
Every solar transformer designed by KROS Electric Co., Ltd. complies with stringent international engineering standards including IEC 60076, IS 2026, and BIS requirements. Engineered with multi-winding configurations and electrostatic shield isolation, our transformers deliver maximum uptime, ultra-low losses, and long-term financial ROI for global solar EPC contractors, IPPs, and renewable energy developers.
Technical Specifications & Engineering Capabilities
KROS Electric Co., Ltd. provides customized solar step-up transformers tailored to specific project requirements, inverter configurations (central or string inverters), and environmental conditions.
| Power Rating (Capacity) | Up to 10 MVA (Single / Multi-winding configurations) |
|---|---|
| Voltage Class | Primary (LV): 415V / 600V / 690V / 800V | Secondary (HV): Up to 33 kV |
| Standard Compliance | IEC 60076, IS 2026, BIS Certified (CM/L-6300090908), ISO 9001:2015 |
| Winding Configuration | Dual LV, Triple LV, or Multiple Winding inputs for central inverter integration |
| Vector Group | Dy11, Dy11y11, Dy11d11, or custom specified per inverter project phase alignment |
| Harmonic Shielding | Electrostatic Shielding between High Voltage and Low Voltage windings |
| Cooling Type | ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced) |
| Core Material | High-permeability, low-loss Cold Rolled Grain Oriented (CRGO) silicon steel |
| Insulation Class | Class A / Class F oil-immersed insulation with thermal endurance rating |
| Enclosure Protection | IP55 / IP65 outdoor duty weather-proof enclosure for desert/coastal installations |
Key Engineering Features for International Buyers
Harmonic Distortion Resistance
Pulse Width Modulation (PWM) from solar inverters generates significant high-frequency harmonics. KROS Electric Co., Ltd. incorporates specialized core density limits and electrostatic grounding shields to prevent core saturation, localized hot spots, and insulation breakdown under non-sinusoidal voltage profiles.
Multi-Inverter Duty Design
Designed with isolated multiple Low Voltage (LV) windings, a single transformer can interface multiple solar inverter stations simultaneously. This design eliminates cross-talk between inverters, optimizes plant footprint, and reduces overall capital expenditures (CAPEX) for solar developers.
Extreme Environment Resilience
Solar power plants are frequently installed in extreme desert, tropical, or coastal locations. Our transformers feature heavy-duty corrosion-resistant tank coatings, high ambient thermal margins, and robust sealing systems tested to operate reliably in ambient temperatures exceeding +50°C.
Low Losses & Maximum Energy Yield
Constructed with prime-grade laser-scribed CRGO core laminations and high-purity electrolytic copper conductors, KROS Electric solar transformers deliver minimal no-load and load losses, maximizing overall system efficiency and power export to the transmission grid.
Rigorous Quality Control & Testing Standards
At KROS Electric Co., Ltd., quality reliability is backed by 35+ years of engineering experience under the leadership of veteran power transformer specialists. Every solar transformer undergoes exhaustive routine, type, and special testing in our state-of-the-art laboratory before dispatch to international destinations.
Need Custom Solar Inverter Transformers for Your Project?
Connect directly with KROS Electric Co., Ltd. technical sales team for comprehensive product specifications, engineering drawings, and competitive export quotations tailored to your solar farm specifications.