Founded in 2003, Enertech Co., Ltd. is a technology-oriented venture specializing in harmonic analysis and power-quality improvement.
Transformers are vital components in power systems, typically operating for over 21 years; so, safety, reliability, and efficiency are key priorities. With the growing adoption of nonlinear loads such as LEDs, UPSs, and inverters, harmonics have become a critical issue, causing energy-loss and voltage-distortion across electrical networks.
Enertech provides a comprehensive one-stop service — from harmonic diagnosis to solution design, installation, and maintenance. In addition, the company is developing Solid Oxide Fuel Cell (SOFC) systems and continuously investing in R&D, in order to enhance energy efficiency and a sustainable power infrastructure.

Hybrid Transformer
Enertech’s flagship hybrid transformer, jointly developed with Korea Electric Power Corporation (KEPCO), is an industry-first, all-in-one transformer that integrates high-efficiency and harmonic-suppression technologies.
It effectively reduces harmonics without a separate filter, thereby improving system stability, power efficiency, and space utilization.

The hybrid transformer has been officially certified as a New Excellent Technology (NET) and an Excellent Procurement Product, and is in operation at over 700 major sites, including public institutions, data centers, and airports.
Enertech also developed a seismic-resistant transformer capable of withstanding earthquakes up to magnitude 8.6 (0.88g or higher) with displacement under 50mm.
Recognized as an Innovative Procurement Product (industry-first) and a Priority Purchase Product for Outstanding Inventions, it demonstrates the company’s leadership in both performance and safety.

Active Harmonic Filter
Enertech’s active harmonic filter (APF) detects and compensates for harmonic currents in real time, improving power quality, load balance, and operational reliability.
It features a DC-Link capacitor fault diagnosis algorithm, allowing for predictive maintenance and reduced downtime.
The APF is widely applied to LED lighting systems, inverters, servers, EV chargers, and industrial automation facilities, thus providing an effective solution for modern smart power systems. 
 
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