What Enertech does

Enertech (에너테크) is a South Korean power equipment manufacturer founded in 2003, specializing in transformers that integrate power transformation with harmonic mitigation in a single unit. The company's flagship product is an industry-first hybrid transformer using a patented Zig-Zag winding method, developed jointly with KEPCO's five power generation subsidiaries beginning in 2008 and certified under the New Excellent Technology (NET) and Green Technology programs. The portfolio also includes seismic-resistant transformers (patented friction-damper technology validated for magnitude 8.6 earthquakes per ICC ES AC 156), KS/IEC-compliant high-efficiency transformers (50–3,000 kVA, oil-immersed and cast-resin variants), active harmonic filters (APF), harmonic diagnosis services, and a graphene supercapacitor-based ESS targeted for Q4 2026 launch. Enertech holds 22 domestic Korean patents and 4 international patents (US and China), with 32 global patents across the portfolio.

The company sells primarily through direct enterprise sales and government procurement channels, targeting data centers, airports (Gimpo, Ulsan, Gimhae, Incheon), power generation (KEPCO subsidiaries, Korea East-West Power, Korea Western Power), public infrastructure (LH housing, high-speed rail, Korea Water Resources Corporation), industrial conglomerates (POSCO, Samsung), and government agencies. Pricing is quote-based; hybrid transformers carry ~30% higher initial cost versus standard high-efficiency units but deliver 8.8% lower power losses, 99.5% maximum efficiency, and roughly KRW 130 million in lifecycle cost savings over 20 years for a 1500 kVA unit. Complementary revenue comes from harmonic diagnosis services (Basic 1-week and Precision 1-month engagements) and a planned subscription-based AI asset management service. Cumulative sales exceed 2,220 units totaling KRW 350 billion, with 1,000+ hybrid transformers and 100M+ kVA installed across 35 countries.

Enertech reached profitability in 2018 and, after 20+ years of organic operation, raised its first external capital in 2026 — a KRW 150 billion Series A, plus approximately KRW 4 billion in redeemable convertible preferred shares (March–April 2026). The company is executing an international expansion into the US (exports initiated 2026), Malaysia (data center partnership), and the broader Middle East, Europe, and Southeast Asia. A graphene supercapacitor ESS is targeted for Q4 2026 launch, and an AI-based transformer asset management system is in development for subscription/rental monetization. Enertech has announced an IPO target of Q2 2029.

Name

Enertech

Legal name

ENERTECH Co., LTD.

Website

https://enerkeeper.com

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

101–250 employees

Short description

Enertech is a Korean power equipment manufacturer founded in 2003, specializing in hybrid transformers that integrate voltage transformation with harmonic mitigation, serving data centers, airports, power utilities, public infrastructure, and industrial customers across 35 countries.

Ownership category

akta.pro rank

Product category

Power Quality Transformers & Electrical Equipment

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Switchgear and Switchboard Apparatus Manufacturing (335313), Electrical Equipment Manufacturing (33531)

SIC

Power, Distribution & Specialty Transformers (3612), Electronic Coils, Transformers & Other Inductors (3677), Switchgear & Switchboard Apparatus (3613)

akta.pro primary industry

Transformers (Power, Distribution, Instrument, Specialty) (IMAGAAAA)

akta.pro secondary industry

Reactive Power & Power Quality Equipment (Capacitor Banks, Reactors, STATCOM/SVC, Harmonic Filters) (IMAGAAAG)

Keywords

• Hybrid transformers
• Harmonic filters
• Power quality solutions
• Seismic-resistant transformers
• Energy storage systems

Headquarters

HQ city

Seongnam

HQ country

South Korea

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Technology or R&D, Personnel, Marketing or Sales, Infrastructure

Revenue model

1. Power Transformer Hardware Sales: Sale of hybrid transformers, seismic-resistant transformers, and high-efficiency transformers as core product lines. Products are sold directly to enterprises, government agencies, and through distributor/reseller networks. Revenue is recognized at point of delivery and installation. Long replacement cycles (decades) but large ticket sizes per unit. Cumulative sales exceed 2,220 units and KRW 350 billion in total sales volume.
2. Active Harmonic Filter (APF) Sales: Sale of active harmonic filter equipment in rack-type and wall-type configurations with capacities of 50A, 100A, and 150A modules. Sold as standalone products or bundled with transformer solutions.
3. Harmonic Diagnosis and Consulting Services: Fee-based harmonic diagnosis and consulting services offered in two tiers: Basic Type (1-week engagement) and Precision Type (1-month engagement). Includes on-site measurement, analysis reports, improvement proposals, and on-site training. Pricing varies by location, personnel, equipment, and measurement scope.
4. AI-Based Transformer Asset Management System (planned): Enertech is developing an AI-based transformer asset management system for launch as a subscription/SaaS model. Planned to monitor transformer health in real-time using gas, voltage, current, harmonic, and vibration sensors. Aims to predict failures and provide asset management — modeled as a subscription/rental service similar to water purifier rental.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Enertech designs, manufactures, and sells power transformers and harmonic-mitigation equipment, including hybrid transformers that integrate voltage transformation with harmonic reduction in a single unit, seismic-resistant transformers, high-efficiency distribution transformers, and active harmonic filters. The company also provides fee-based harmonic diagnosis services using IEEE 519 standards and is developing an Energy Storage System (ESS) based on graphene supercapacitor battery technology. Products are sold primarily to data centers, airports, power plants, public infrastructure projects, and large industrial enterprises in Korea and internationally.

Product overview

Enertech is a Korean power technology company specializing in transformer solutions and power quality improvement. The product portfolio centers on four main transformer categories (Hybrid, Seismic-Resistant, and High-Efficiency transformers in both cast-resin and oil-immersed variants), complemented by Active Harmonic Filter products and professional Harmonic Diagnosis services. The Hybrid Transformer, developed jointly with KEPCO's five power generation subsidiaries, is the company's flagship innovation, integrating harmonic mitigation directly into the transformer design. The Seismic-Resistant Transformer uses patented friction-damper technology for earthquake resilience. A next-generation ESS product is under development.

Differentiator

Problem solved

Functional benefit

Products and services

• Hybrid Transformer (하이브리드 변압기) An all-in-one transformer combining voltage transformation with harmonic mitigation functions using patented Zig-Zag winding technology. Developed jointly with KEPCO's five power generation subsidiaries and certified under NET (New Excellent Technology) and Green Technology programs. Available in cast-resin and oil-immersed variants with capacities from 50 to 3000 kVA. Max efficiency 99.5%, power loss reduction up to 8.8%, and annual carbon emission reduction of 2,243 kg per unit. Sold to data centers, airports, power plants, government agencies, and large industrial enterprises.
• Seismic-Resistant Transformer (내진형 변압기) Transformer with industry-leading seismic performance using patented friction-damper vibration control technology. Maintains stable operation during earthquakes of magnitude 8.6 and reduces seismic displacement by up to 90%. Reduces TCO by 20%. Available in cast-resin and oil-immersed variants with capacity range of 50-3000 kVA. Validated by accredited testing agencies (KGS, Earthquake Disaster Prevention Research Center) per ICC ES AC 156 standard. Sold to public infrastructure buyers including airports, rail, and government buildings in seismically active regions.
• High-Efficiency Transformer (고효율 변압기) High-efficiency distribution transformers manufactured in compliance with KS and IEC international standards (KS C IEC 60076-1, KS C IEC 60076-11). Available in cast-resin (mold) and oil-immersed configurations with capacities from 50 to 3000 kVA. Meets KS standard consumption efficiency requirements for energy savings and operating cost reduction. Sold to commercial and industrial facilities requiring standard high-efficiency distribution transformers.
• Harmonic Filter / Active Harmonic Filter (고조파 필터) Active harmonic filter (APF) that detects and compensates harmonics from non-linear loads in real time using IGBT-based control with ultra-fast response time of ≤5ms and intelligent FFT algorithm. Achieves THDi within 5%, power factor ≥99.0%, and unbalance compensation within 5%. Available in rack-type and wall-type configurations with module capacities of 50A, 100A, and 150A. Modular parallel expansion up to 12 units with automatic resonance prevention through system impedance calculation. Includes 7-inch HMI for real-time monitoring. Sold to industrial, data center, and renewable energy customers.
• Harmonic Diagnosis Service (고조파 진단) Professional harmonic measurement and diagnosis service for industrial, commercial, and infrastructure customers, based on IEEE 519 standards with IEC compliance. Equipped with 6+ advanced analysis instruments and delivered by 2 PhDs, 3 Masters, 1 senior technician, and 3 licensed electrical engineers. Includes on-site measurement, diagnostic reports, customized improvement solutions, and on-site training. Available as Basic Type (1-week engagement) covering basic harmonic diagnosis, insulation thermal imaging, and electrical quality analysis; and Precision Type (1-month engagement) covering infrared thermal imaging, electrical quality analyzer, insulation resistance meter, hook meter, and noise measurement.
• ESS - Energy Storage System (ESS) Energy storage system using graphene supercapacitor battery technology designed to eliminate fire and explosion risks at the source. Features battery safety and efficiency-focused design for stable power operation. Applications include peak power reduction, renewable energy integration, frequency regulation, and emergency power backup. Public institutions with 1,000kW+ existing buildings or 2,000kW+ new buildings must install ESS meeting 5% of contracted power as PCS(kW) with 2-hour battery capacity (kWh).

Quantifiable outcome

• 40% reduction in initial investment cost compared to traditional transformer + harmonic filter approach (1500kVA standard scenario)
• +7 more outcomes

Named customers8 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Malaysia Data Center PartnerscoreStrategic or Co-development Partner · 1 January 2026Enertech established a partnership for data center transformer supply in Malaysia, marking the company's first concrete international market entry. This partnership serves as a template for expanding into other international markets where data center construction is accelerating.
• KEPCO Power Generation Subsidiaries (발전5사)coreStrategic or Co-development PartnerJoint R&D partnership with all five of KEPCO's power generation subsidiaries (한국전력공사 산하 발전5사) for hybrid transformer technology development. Started in 2008 with a joint development agreement. The partnership resulted in the industry's first hybrid transformer with NET certification. The five companies' development qualification product registration for the hybrid transformer was completed in 2011.
• Korea East-West Power Co., Ltd. (한국동서발전)minorStrategic or Co-development PartnerSelected as 'Tech-Friend Enterprise' (Tech-Friend 기업 선정) in 2012, recognizing collaboration in power plant technology. The company published technical papers on hybrid transformers through Korea East-West Power's technology magazine. Also collaborated on the Dangjin thermal power plant demonstration test of hybrid transformers in 2009.
• D.Camp (은행권청년창업재단)minorGTM or Marketing PartnerSelected for D.Camp 'Batch 6' scaleup program in 2026. D.Camp provides mentorship from industry experts, investment linkage support, and networking opportunities for global expansion. Enertech is one of 8 deep-tech startups selected, with D.Camp positioning it for international market entry through mentorship.
• Korea Land and Housing Corporation (LH, 한국토지주택공사)minorStrategic or Co-development PartnerLH selected Enertech's low-loss hybrid transformer as 'Excellent New Technology' (우수 신기술 선정) in 2018. LH's technical specifications for public housing electrical installations reference hybrid transformers and harmonic reduction devices.
• KT Energy Alliance (KT 에너지 얼라이언스)minorStrategic or Co-development PartnerCollaboration agreement signed in 2018 for energy solutions in KT's infrastructure projects.
• Korea Western Power Co., Ltd. (한국서부발전)minorStrategic or Co-development PartnerDesignated as a Korea Western Power partner company (협력기업).

Scale indicators7 records

Recent moves8 records

Expansion highlights6 records

Market position

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/enertech-co-ltd

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Enertech