DIK Co.

What DIK Co. does

DIK Co. (디아이케이 주식회사) is a South Korean privately-held power conversion technology company founded in May 1981 (originally as Dongil Instrument, renamed DIK in March 2000), headquartered in Chuncheon-si, Gangwon-do with an R&D center in Bucheon Techno Park, Gyeonggi-do. The company manufactures proprietary electrical power conversion equipment spanning PV inverters under the Solvert brand (Home Series 1-3.5kW residential, Medium Series 10-125kW commercial/industrial, MPS Multi Power Stack 200-500kW utility-scale), Energy Storage System PCS products (50kW-1MW, transformer and transformerless), industrial induction heating systems (3-300kW low/high frequency), wireless EV charging inverters developed with KAIST (OLEV platform), pH meters for water quality, and Solvert Control monitoring systems. Technology is 100% proprietary and protected by an extensive patent portfolio covering MPS architecture, anti-islanding control, grid-forming control, IoT-based fault diagnosis, and heating-bolt induction systems.

The company operates a dual GTM model combining direct sales to end customers (residential homeowners, commercial buildings, industrial plants, and government facilities) with a Korean channel partner network of 13 installation and engineering firms including Hyundai Energy, ENH, Jung-Woo Engineering, and Hyundai Necsol. Revenue derives from hardware sales across the four product lines plus after-sales service. International revenue includes US exports of induction heating systems exceeding USD 1 million annually (earning the 2007 USD 1 Million Export Tower), Southeast Asia distribution, and a 2023 entry into a Saudi Arabia industrial complex for solar inverter manufacturing. Certifications span KS (Korean Industrial Standards), CE (Europe), NRTL (USA), ISO 9001/14001/50001, GS, Green Technology, NEP, NET, and KOTRA Green Guarantee Brand, supporting both domestic public-sector procurement and export market access.

Business is led by CEO Kang Moon-soo (강문수), with a thin management bench of seven identified personnel. Customer base is diversified across many small-to-mid-size installations (schools, post offices, city halls, hospitals, industrial sites) plus select utility-scale projects (notably the 1MW Jeju Seongsan Solar Power Plant). With 11-50 employees, no disclosed external funding, and no audited revenue figures, DIK operates as a mature, founder-controlled Korean SME that has compounded capabilities in power electronics over four decades through government-sponsored R&D projects, certifications, and incremental international expansion.

Name

DIK Co.

Legal name

디아이케이 주식회사

Website

https://dik.co.kr

Company type

Private

Founded year

1981

Operating status

Operating

Headcount range

11–50 employees

Short description

DIK Co. is a South Korean privately-held manufacturer of proprietary power conversion equipment — PV inverters, ESS PCS, and induction heating systems — serving residential, commercial, industrial, and government customers in Korea with selective exports to the US, Southeast Asia, and Saudi Arabia.

Ownership category

akta.pro rank

Product category

Solar Power Inverters

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Switchgear and Switchboard Apparatus Manufacturing (335313), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Switchgear & Switchboard Apparatus (3613), Power, Distribution & Specialty Transformers (3612)

akta.pro primary industry

Solar Inverters, Power Electronics & MLPE (String/Central Inverters, Optimizers, Microinverters) (EUAMABAE)

akta.pro secondary industries

DC/DC Converters & Battery Interface Power Electronics (EUAFAIAD), Renewable Power Electronics & Advanced Inverters R&D (SiC/GaN, Grid-Forming, HVDC Converter Tech) (EUAMAOAF), DC-DC Converters & Power Modules (Isolated/non-isolated, POL modules) (IMAGADAB)

Keywords

• Solar PV inverters
• Energy storage systems
• Induction heating equipment
• Power conversion systems
• Wireless EV charging

Headquarters

HQ city

Bucheon

HQ country

South Korea

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Solar PV Inverters (Solvert Series): DIK generates revenue primarily from manufacturing and selling solar PV inverters under the Solvert brand. Product lines include Home Series (residential, 1-3.5kW), Medium Series (commercial, 15-125kW), and MPS Series (utility-scale, up to 500kW). Inverters are sold directly and through channel partners for solar power generation installations.
2. Energy Storage Systems (ESS): ESS PCS (Power Conversion System) products ranging from 50kW to 1MW. Both transformer and transformerless types. Revenue generated from sale of complete ESS PCS units to industrial and utility customers.
3. Induction Heating Systems: Low frequency (IGBT type) and high frequency (FET type) induction heating systems sold to metal processing, power plant, and industrial customers. Exports to the United States exceeding USD 1 million annually. Also sells heating bolt systems for power plant maintenance.
4. Monitoring Systems and Accessories: Solvert monitoring systems including DAT-100 (air temperature sensor), DIS-100 (solar radiation sensor), DPT-100 (module surface temperature sensor), DSB-500 (sensor box), DPHMI-100 (Solvert Control HMI), and Web Monitoring. Accessories sold alongside inverters.
5. pH Meters and Environmental Instruments: pH controllers (NPH-6000, WSP-100), pH sensors (DIK-004, GR-1K, SP-12F, SP-12F-H) for water treatment and industrial process monitoring applications.
6. After-Sales Service and Technical Support: DIK provides after-sales service and technical support through its AS system with dedicated phone lines. Technical support for PV inverters, ESS, and environmental instruments is provided by specialized staff.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

DIK manufactures and sells proprietary power conversion equipment under the Solvert brand, including solar PV inverters (Home Series 1–3.5kW, Medium Series 10–125kW, MPS Series 200–500kW), Energy Storage System Power Conversion Systems (50kW–1MW), and industrial induction heating systems (3kW–300kW). The company also produces wireless EV charging inverters (OLEV, co-developed with KAIST), pH meters for industrial water quality monitoring, and a Solvert Control monitoring platform. All products are built on 100% in-house developed power conversion technology combining electrical engineering and IT for real-time fault diagnosis.

Product overview

DIK Co. offers a comprehensive portfolio of power conversion and energy management products centered on the SOLVERT brand. The core offering consists of PV (photovoltaic) inverters across three series: Home Series (1-3.5kW residential), Medium Series (10-125kW commercial/industrial), and MPS Series (200-500kW utility-scale). These are complemented by ESS (Energy Storage System) PCS products (50kW-1MW), induction heating systems for industrial metal processing (3kW-300kW), wireless charging inverters developed with KAIST for electric vehicles, environmental measurement instruments (pH meters), and monitoring/control systems (SOLVERT Control) with sensors and web-based monitoring platforms. All products are developed with 100% proprietary technology combining power conversion expertise with IT systems.

Differentiator

Problem solved

Functional benefit

Brands

• Solvert: DIK's proprietary brand for PV inverters, ESS, and monitoring systems. Solvert inverters are produced with 100% proprietary electricity conversion technology integrated with IT capabilities for real-time measurement, analysis, and diagnosis of solar power generation systems.

Products and services

• Solvert Home Series (DPSL) PV Inverters Residential-scale solar PV inverters ranging from 1kW to 3.5kW (DPSL-W01LEK-J 1kW, DPSL-03LS 3kW, DPSL-W03LEK-J 3.5kW), wall-mounted with MPPT control and designed for ease of installation and residential aesthetics under programs such as the Green Home 1 Million Households initiative.
• Solvert Medium Series (DPTM/DPTH) PV Inverters Commercial and industrial-scale string inverters ranging from 10kW to 125kW, including wall-mounting types (DPTH-W series), MCCB types (DPTH-WM series), and string types (DPTM-W series) for mid-sized solar installations on public facilities, commercial buildings, schools, and industrial sites.
• Solvert MPS Series (Multi Power Stack) PV Inverters Large-scale multi-string inverters (200kW–500kW) featuring MPS (Multi Power Stack) technology with circulation inversion for maximum efficiency up to 98.88%, modular plug-in power stacks for easy maintenance, and outdoor-rated enclosures for utility-scale solar power plants.
• Solvert ESS Series (Energy Storage System PCS) Energy Storage System Power Conversion Systems ranging from 50kW to 1000kW with efficiency exceeding 98%, including transformerless types (DETF-L series) and transformer types (DETF-TE series), plus DC-DC converters for battery storage integration in peak shaving, grid stabilization, and renewable energy integration applications.
• Induction Heating Systems (IHS) Industrial induction heating systems for metal processing including casting, forging, and heat treatment, comprising low-frequency IGBT types (10kW–300kW) and high-frequency FET types (3kW–300kW) with frequency ON/OFF control, self-diagnostic capability, and stable output waveforms; exported to the United States exceeding USD 1 million annually.
• FPSD Heating Bolt Induction Heater Specialized 30kW heating bolt induction heating system with integrated inverter and cooling for bolt/nut disassembly and assembly in thermal and nuclear power plant maintenance applications.
• Wireless EV Charging Inverter (OLEV)
• pH Meter Series (Environmental Water Quality Instruments)
• Solvert Control Monitoring System

Quantifiable outcome

• Maximum inverter efficiency up to 98.88% in MPS series (DPTH-200LE3)
• +6 more outcomes

Named customers13 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

Feature8 records

Partnerships

19 partnerships are on record, tiered core and minor.

• Hyundai Energy Co., Ltd. (현대에너지)coreChannel Partner/ Reseller/ DistributorHyundai Energy is listed as a DIK partner, likely serving as a channel partner for solar energy products including inverters and ESS systems in the Korean market.
• ENH Co., Ltd. (이엔에이치)coreChannel Partner/ Reseller/ DistributorENH is listed as a DIK partner, serving as a channel partner for DIK's solar and energy products.
• Jung-Woo Engineering Co., Ltd. (정우엔지니어링)coreChannel Partner/ Reseller/ DistributorJung-Woo Engineering (JWSolar) is listed as a DIK partner, serving as a solar installation and engineering partner.
• Sejin Engineering Co., Ltd. (세진엔지니어링)coreChannel Partner/ Reseller/ DistributorSejin Engineering is listed as a DIK partner for solar installation and engineering services.
• Hyundai Necsol Co., Ltd. (현대넥솔)coreChannel Partner/ Reseller/ DistributorHyundai Necsol is listed as a DIK partner, serving as a channel partner for DIK's solar products.
• Halla Engineering Co., Ltd. (한라기술단)coreChannel Partner/ Reseller/ DistributorHalla Engineering (ECOHL) is listed as a DIK partner, serving as a solar engineering and installation partner.
• SUNMASTER Co., Ltd. (썬마스터)coreChannel Partner/ Reseller/ DistributorSUNMASTER is listed as a DIK partner for solar energy products and services.
• Yusung Energy Co., Ltd. (유성쏠라에너지)coreChannel Partner/ Reseller/ DistributorYusung Energy (YUSUNG) is listed as a DIK partner for solar energy products.
• Gwangmyeong CNC Co., Ltd. (광명CNC)minorChannel Partner/ Reseller/ DistributorGwangmyeong CNC (KMCNC) is listed as a DIK partner, serving as a solar engineering partner.
• CVnet Co., Ltd. (삼성CVNET)minorChannel Partner/ Reseller/ DistributorCVnet is listed as a DIK partner for solar energy products.
• ELT Energy Co., Ltd. (ELT)minorChannel Partner/ Reseller/ DistributorELT Energy is listed as a DIK partner for energy products.
• Hansung Engineering Co., Ltd. (한성엔지니어링)minorChannel Partner/ Reseller/ DistributorHansung Engineering (HS100) is listed as a DIK partner for solar engineering.
• DSS Tech Co., Ltd. (다쓰테크이엔씨)minorChannel Partner/ Reseller/ DistributorDSS Tech is listed as a DIK partner.
• Korea Advanced Institute of Science and Technology (KAIST)coreStrategic or Co-development PartnerDIK developed and tested a wireless fast-charging inverter system for KAIST's OLEV (Online Electric Vehicle) project. OLEV is an electric vehicle that can be charged while stationary or in motion without stopping at charging stations. Pilot operation was conducted at KAIST's Moonji Campus.
• KOKAM Company Ltd.coreStrategic or Co-development PartnerJoint development project with KOKAM Company Ltd. and Hyundai Heavy Industries Co., Ltd. Conducted in 2013 for ESS national project.
• Hyundai Heavy Industries Co., Ltd.coreStrategic or Co-development PartnerJoint development project with KOKAM Company Ltd. and Hyundai Heavy Industries. Conducted in 2013 for ESS national project.
• Korea Institute of Energy Technology Evaluation and Planning (에너지 기술평가원)coreStrategic or Co-development PartnerGovernment sponsor for multiple national projects including nuclear reactor cooling pump heating bolt and induction heating system development (2013-2016).
• Korea Agency for Infrastructure Technology Advancement (건기평)coreStrategic or Co-development PartnerGovernment sponsor for eco-friendly public transportation system based on contactless power transmission method (2011-2013).
• Korea Energy Agency (한국에너지공단)coreStrategic or Co-development PartnerKorea Energy Agency provides KS certification for DIK's solar inverters, connection boxes, and ESS products. Multiple KS certifications obtained for PV inverter products.

Scale indicators3 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• HD Hyundai Electric: Korean manufacturer of transformers, switchgear, and rotating machinery. Comparable as a domestic incumbent that competes in Korean power infrastructure tenders alongside DIK's power conversion and switchboard offerings.
• LS Electric: Korean broad incumbent in power electronics, switchgear, automation, and renewable inverters. Comparable as a domestic competitor for Korean utility and C&I solar / ESS projects, with broader portfolio than DIK.
• Sungrow: Global market leader in solar inverters and ESS PCS, with a Korean presence. Comparable because it directly overlaps with DIK's Solvert PV inverter and ESS product lines across utility, C&I, and residential segments.
• Hyosung Heavy Industries: Korean manufacturer of power and industrial equipment including transformers and renewable energy systems. Comparable as a domestic incumbent in the Korean power conversion and renewable infrastructure space.

Direct peers

• SMA Solar Technology: German manufacturer of solar inverters spanning residential string to utility-scale central inverters, plus storage and monitoring. Closely comparable in product scope and target customer segments (C&I, utility, residential) to DIK's Solvert lineup.
• Inductotherm: US-headquartered global leader in induction heating equipment for metal processing. Comparable as a direct competitor to DIK's induction heating systems and heating-bolt product lines for industrial and power plant customers.
• EFD Induction: European manufacturer of induction heating solutions for industrial applications including power plants. Comparable as a direct competitor to DIK in low- and high-frequency induction heating and bolt heating systems.
• Power Electronics: Spanish manufacturer of solar inverters and energy storage power conversion systems for utility and C&I. Comparable as a direct competitor in the higher-power PV inverter and ESS PCS segments where DIK's MPS series and ESS lineup compete.

Emerging players

• Enphase Energy: US-based manufacturer of microinverters and home battery systems. Comparable as a competing inverter and storage brand focused on residential and small C&I segments with monitoring software, overlapping with DIK's Home Series and monitoring strategy.
• GoodWe: China-headquartered manufacturer of solar inverters and batteries spanning residential, C&I, and utility. Comparable as a competing inverter and ESS brand with growing presence in Korean and global markets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/디아이케이-주식회사-175620936553355
• Instagraminstagram.com/dik_co_ltd
• LinkedInlinkedin.com/company/dik-co-ltd

Compliance20 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

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 DIK Co.