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South Korea

Overview​

South Korea's electricity market is highly centralized, characterized by a state-led model dominated by the Korea Electric Power Corporation (KEPCO), which manages transmission, distribution, and retail, while the Korea Power Exchange (KPX) operates the wholesale market 1. The generation sector consists of six KEPCO subsidiaries and over 6,000 Independent Power Producers (IPPs) 1.

The country relies on imports for approximately 98% of its fossil fuel requirements, resulting in a grid carbon intensity of roughly 396 gCO2eq/kWh as of 2025 1. While this represents a decline from a 2018 peak, the intensity remains higher than the global average due to a historical reliance on fossil fuels 1. The energy mix is shifting: in April 2025, fossil fuels accounted for less than 50% of total electricity generation for the first time on record, dropping from roughly 60% in 2024 2. Conversely, low-carbon sources (nuclear and renewables) represented approximately 40–41% of the mix in 2024 1.

As of 2024, renewable energy accounted for approximately 10.6% of total domestic power generation 3. The government finalized the 11th Basic Plan for Electricity Supply and Demand in February 2025, targeting a power mix of 70.7% carbon-free energy by 2038. This includes specific goals of 35.2% nuclear, 29.7% renewables, and capping fossil fuels at 29.3% 2. ⚠️ There is a discrepancy in the stated renewable targets for 2038 between sources (29.7% vs. 33%), which requires verification.

The market faces significant challenges, including KEPCO's substantial financial debt (estimated at over ₩202 trillion in 2023) due to regulated retail prices not covering wholesale costs, and grid constraints that hinder the integration of intermittent renewables 1.

Market Structure​

South Korea's electricity market is characterized by a centralized, state-led model dominated by the Korea Electric Power Corporation (KEPCO). While the wholesale generation sector was unbundled in 2001, KEPCO retains a virtual monopoly over transmission, distribution, and retail sales 45.

Vertical Integration and Ownership KEPCO is a vertically integrated utility that owns the transmission and distribution assets. Although publicly listed, the South Korean government and the state-owned Korea Development Bank collectively own 51% of KEPCO's shares, maintaining state control 6. The generation sector consists of six major KEPCO subsidiaries, including Korea Hydro & Nuclear Power (KHNP) and five regional thermal power companies 7.

Wholesale Market and System Operation The Korea Power Exchange (KPX), established in 2001, functions as the equivalent of an Independent System Operator (ISO). KPX is responsible for the real-time operation of the power system and operates the wholesale market based on a "Cost-Based Pool" (CBP) model, dispatching generators according to operating costs 8[Federal Energy Regulatory Commission (.gov) +2].

Retail Sector and Deregulation The retail market remains heavily regulated with no full retail choice for end-users. Retail tariffs are set by the Ministry of Trade, Industry and Energy (MOTIE) to ensure price stability 5. However, targeted reforms are introducing limited competition for renewable energy:

  • Direct Power Purchase Agreements (PPAs): Since 2021, business consumers have been permitted to bypass KEPCO to purchase renewable energy directly from generators 8.
  • K-RE100: A scheme allowing corporate consumers to selectively purchase renewable power to meet sustainability targets 9.
  • P2P Trading: The government has tested blockchain-based peer-to-peer energy trading in specific apartment complexes 9.

Future Reform and Challenges Full deregulation faces significant hurdles, including public opposition to privatization, energy security concerns due to the lack of international grid connections, and fears of rising prices. International bodies like the IEA have recommended establishing a fully independent regulator and further unbundling KEPCO to enable competitive, bid-based markets 109.

Clean Energy Policy​

South Korea's clean energy policy is driven by the Framework Act on Carbon Neutrality and Green Growth (effective March 2022), which legally binds the country to a net-zero emissions target by 2050 11. To support this, the government has set an interim goal to reduce greenhouse gas emissions by 40% relative to 2018 levels by 2030 12.

Renewable Portfolio Standard (RPS)​

The primary mechanism for promoting renewable electricity is the Renewable Portfolio Standard (RPS), established in 2012 to replace the previous Feed-in Tariff system 13.

  • Obligation: Applies to power generation companies with an installed capacity exceeding 500 MW.
  • Compliance: Companies meet targets by generating renewable power directly or purchasing Renewable Energy Certificates (RECs) through the Korea Power Exchange (KPX) 13.
  • Targets: The government has periodically adjusted quotas, revising 2023–2024 targets downward to maintain a "realistic" energy mix. Current targets include 13.5% for 2024, 15.0% for 2026, and 25.0% by 2030 14.
  • Reforms: In May 2024, the Ministry of Trade, Industry and Energy (MOTIE) announced a master plan to transition from the REC-based market to a government-led bidding system. This reform aims to lower energy costs, stabilize volatile REC prices, and simplify Power Purchase Agreement (PPA) requirements 15.

Legislative Mandates and Sector Goals​

Recent legislation has expanded clean energy requirements across various sectors:

  • Energy Three Laws (2025): Includes the Special Act on Offshore Wind to streamline permitting and accelerate projects, alongside laws for national grid expansion 16.
  • Zero-Energy Buildings: Mandatory for new public buildings since 2020; expanded to private buildings and apartments in 2025 16.
  • Solar Parking Lots: Starting November 28, 2025, public parking lots larger than 1,000 $m^2$ must install renewable energy systems of at least 100 kW 17.
  • Clean Hydrogen Portfolio Standard (CHPS): Introduced to move hydrogen-based power generation out of the RPS into a dedicated competitive bidding system 16.

Electricity Generation Strategy​

The power sector, which accounts for roughly 32–37% of national emissions, is undergoing a significant transition outlined in the 11th Basic Electricity Plan (2024–2038) 18:

  • Renewables: Targeted to reach 21.6% by 2030 and 29.7%–32.9% by 2038. Renewables surpassed 10% of the power mix for the first time in 2024 19.
  • Nuclear: Following a 2022 policy reversal, nuclear is targeted to provide 35.2% of electricity by 2038 19.
  • Fossil Fuels: At COP30 in late 2025, South Korea joined the Powering Past Coal Alliance, committing to retire 40 of its 61 coal plants by 2040 12.
  • Hydrogen & Ammonia: Targeted to provide 6.2% of power by 2038 through co-firing in existing plants 19.

Implementation Challenges​

South Korea faces significant barriers in meeting these mandates:

  • Grid Bottlenecks: Approximately 18 GW of renewable projects are stalled due to inadequate transmission network capacity 20.
  • Land Constraints: roughly 70% of the country is mountainous, complicating large-scale onshore solar and wind development 20.
  • Performance: As of early 2026, renewables constituted only 10–11% of the energy mix, indicating difficulty in meeting rapid growth targets 21.
  • Demand Growth: Electricity demand is projected to increase by 30% by 2038, driven by industries like semiconductor manufacturing, necessitating rapid clean energy deployment to comply with international regulations such as Europe's CBAM 20.

Utility Landscape​

The South Korean electricity market is highly centralized, dominated by the state-owned Korea Electric Power Corporation (KEPCO). The government holds a 51.1% stake in KEPCO, which serves as the sole buyer and distributor of electricity for the country 22. KEPCO is responsible for approximately 96% of the nation's electricity generation, managed through six wholly owned subsidiaries known as the "Big Six," which were split from KEPCO in 2001 to foster internal competition 22.

These major generation subsidiaries include:

  • Korea Hydro & Nuclear Power (KHNP): The largest generator, managing all 25 nuclear reactors and 37 hydropower plants, accounting for roughly 30% of total capacity 22.
  • Korea Midland Power (KOMIPO): Operates the Boryeong site with ~10,775 MW capacity 22.
  • Korea Western Power (KOWEPO): Operates the Taean plant with 11,872 MW capacity 22.
  • Korea East-West Power (EWP): Manages Dangjin and Honam plants with 9,579 MW capacity 22.
  • Korea South-East Power (KOEN): Operates sites like Samcheonpo with ~9,363 MW capacity 22.
  • Korea Southern Power (KOSPO): Operates the Hadong site and the Shinincheon Bitdream Center, the world’s largest hydrogen fuel cell power plant 22.

Unlike the electricity sector, natural gas retail distribution is largely privatized, served by major city gas providers such as Seoul City Gas, Samchully, and Daesung Energy 23. Independent Power Producers (IPPs) like SK E&S and GS EPS are also expanding their presence, particularly in clean energy sectors like offshore wind and LNG generation 24. The Korea District Heating Corporation (KDHC), a state-run entity, dominates the district heating sector 24.

There are no traditional municipal electric utilities or rural electric cooperatives in South Korea; local governments collaborate with KEPCO on infrastructure rather than operating independent grids 25. However, a small movement of community-led Renewable Energy cooperatives has emerged since 2013, focusing primarily on small-scale solar projects 26.

SSS-Eligible Resources​

South Korea's eligible resources for Standard Supply Service (SSS) are defined by a mix of legacy "clean" baseload power and a growing portfolio of modern renewables. The national energy mix is currently anchored by nuclear power, which provides approximately one-third of the country's total electricity 27. As of early 2026, the state-run Korea Hydro & Nuclear Power (KHNP) operates 26 nuclear reactors across five major complexes 27.

Nuclear Power Recent capacity additions include Shin Hanul Unit 2, which commenced commercial operations on April 8, 2024, adding 1.4 GW of capacity 27. Furthermore, Saeul Unit 3 received operational approval in December 2025 and is expected to reach full commercial operation following a six-month pilot run 27. Following the 2025 election of President Lee Jae-myung, the government reversed the previous phase-out policy; the 11th Basic Plan now includes constructing two new large-scale reactors by 2037–2038 and the country's first commercial Small Modular Reactor (SMR) by 2035 27. Construction of Shin Hanul Units 3 & 4 officially began in May 2025 27.

Hydroelectric Power Hydroelectric power accounts for approximately 1.5% of total electricity generation as of early 2024 28. The total installed capacity is approximately 6,489 MW, comprising 4,700 MW of pumped storage and 1,789 MW of conventional hydro 28. KHNP operates the majority of these facilities, including 37 hydroelectric and 16 pumped-storage stations 22. To support grid stability, KHNP is developing three new pumped-storage plants in Yeongdong (500 MW), Hongcheon (600 MW), and Pocheon (750 MW), with completion expected by 2031 22.

Renewable Energy & Transition Goals While nuclear remains the largest source of carbon-free electricity, "modern" clean energy (renewables) surpassed the 10% threshold for the first time in 2024 29. Under the 11th Basic Plan for Long-term Electricity Supply and Demand (BPLE), the government aims to reach 21.6% renewable energy by 2030 and 32.9% by 2038 30. This transition includes a pledge to phase out all coal-fired power plants by 2040 and a national commitment to reach Net Zero emissions by 2050 30. To address grid bottlenecks, an "Energy Superhighway" is planned for completion by 2030 to transport renewable energy from coastal regions to metropolitan centers 30.

EAC/REC Registry Infrastructure​

South Korea utilizes a dual-system approach for tracking Energy Attribute Certificates (EACs), managing a domestic registry for compliance and voluntary markets alongside a newly adopted international standard.

Domestic Registry (K-REC)​

The primary tracking system is the K-REC (Korean Renewable Energy Certificate) program. It is managed by the Korea Energy Agency (KEA), which oversees the Korea New Renewable Energy Certificate (KNREC) system for issuance and information maintenance 31. While the KEA manages the registry, trading transactions occur primarily through the Korea Power Exchange (KPX) 31. Originally designed for the mandatory Renewable Portfolio Standard (RPS), the system expanded in 2021 with the launch of the "K-RE100" management system, allowing private companies to purchase K-RECs voluntarily to meet global sustainability goals 31. Eligibility for K-RECs is generally limited to electricity exported to the national grid 31.

International Registry (I-REC)​

In April 2025, South Korea was approved for I-REC(E) issuance to address gaps in the domestic system, specifically for assets that do not interact with the national grid (e.g., behind-the-meter rooftop solar for self-consumption) 3132. The Green Certificate Company (GCC) was approved as the designated accredited issuer for South Korea in July 2025 31. To prevent double-counting, strict rules prohibit assets registered under the national K-REC system from receiving I-REC issuance 3132.

Emerging Mechanisms (K-REGO)​

A newer mechanism known as K-REGO (Korean Renewable Energy Guarantees of Origin) has been introduced. This system is designed to simplify voluntary renewable energy procurement for global companies, signaling a shift toward more accessible transaction structures 32.

Operational Details​

  • Double-Counting Prevention: There is a strict "no double-counting" rule where generation volumes used for K-RECs cannot be used to create I-RECs 32.
  • Tracking Attributes: Each certificate represents 1 MWh and contains unique identifiers, including technology type, facility location, and production date (vintage) 32.
  • Retirement: To make a valid environmental claim for reporting standards such as CDP or the GHG Protocol, EACs must be "retired" or "cancelled" in the registry 32.

Emissions Factors & Data Sources​

National Average and Trends South Korea's national grid emission factor has gradually declined due to shifts in the energy mix.

  • 2022: Approximately 436 gCO₂/kWh 30.
  • 2021/2022: Approximately 493 gCO₂/kWh (0.493 kgCO₂/kWh) 33.
  • 2020: 415.6 gCO₂/kWh 34.
  • 2030 Projections: Expected to drop to between 253 and 342 gCO₂/kWh, depending on renewable energy adoption speeds 35.

Regional Variance There is significant disparity in emission factors across provinces due to local generation mixes 36.

  • High Intensity (Seoul): ~633 gCO₂eq/kWh (0.633 kgCO₂/kWh), driven by reliance on coal/LNG imports.
  • Low Intensity (Gyeongbuk): As low as 12 gCO₂eq/kWh (0.012 kgCO₂/kWh), due to a high concentration of nuclear power.

Scope 2 Reporting Standards

  • Methodology: Scope 2 reporting follows a location-based approach using a national grid emission factor, as a standardized residual mix factor is currently unavailable 36.
  • Mandatory Disclosure: As of January 1, 2024, listed companies with assets over KRW 2 trillion must disclose Scope 1 and 2 emissions 36.
  • Market-Based Challenges: ⚠️ There are hurdles for market-based reporting. South Korea lacks an officially published "residual mix," and its Renewable Energy Certificates (RECs) have been criticized for not meeting all GHG Protocol Scope 2 Quality Criteria. This creates risks of double-counting renewable benefits 36.

Data Sources

  • Primary Source: Korea Electric Power Corporation (KEPCO), the sole utility provider, provides national and regional grid data 36.
  • International Sources: The International Energy Agency (IEA) provides official factors; aggregators like Climatiq often cite values around 0.272–0.274 kgCO₂/kWh, though these vary based on trade adjustments and included gases 37.

References​

Sources & Last Updated​

Research Date: 2026-03-14
Data Sources: SerpAPI research aggregation, IEA, IRENA, national energy agencies

This page was generated using automated research and may contain inaccuracies. Verify critical data with primary sources.

Footnotes​

  1. 1 ↩ ↩2 ↩3 ↩4 ↩5 ↩6

  2. 1, 2 ↩ ↩2

  3. 2 ↩

  4. Wikipedia +2 ↩

  5. ScienceDirect.com +4 ↩ ↩2

  6. APMDD +1 ↩

  7. World Nuclear Association +2 ↩

  8. ScienceDirect.com +1 ↩ ↩2

  9. ScienceDirect.com +5 ↩ ↩2 ↩3

  10. ScienceDirect.com +3 ↩

  11. Asia Society +1 ↩

  12. IEA – International Energy Agency +4 ↩ ↩2

  13. Asia Pacific Energy Portal +3 ↩ ↩2

  14. InfluenceMap +2 ↩

  15. IEEFA | Institute for Energy Economics and Financial Analysis +1 ↩

  16. Sustainability Directory +7 ↩ ↩2 ↩3

  17. Sustainability Directory +4 ↩

  18. BloombergNEF +1 ↩

  19. Climate Action Tracker +3 ↩ ↩2 ↩3

  20. Asia Natural Gas & Energy Association +4 ↩ ↩2 ↩3

  21. KWM +1 ↩

  22. Wikipedia ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10

  23. Investing.com ↩

  24. Statista ↩ ↩2

  25. Power Line Magazine ↩

  26. ScienceDirect.com ↩

  27. World Nuclear Association ↩ ↩2 ↩3 ↩4 ↩5 ↩6

  28. ANDRITZ GROUP ↩ ↩2

  29. IEA – International Energy Agency ↩

  30. IEEFA ↩ ↩2 ↩3 ↩4

  31. Search Result 2 ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7

  32. Search Result 3 ↩ ↩2 ↩3 ↩4 ↩5 ↩6

  33. U.S. EPA ↩

  34. Climate Transparency ↩

  35. Environmental Engineering Research ↩

  36. Solutions for Our Climate ↩ ↩2 ↩3 ↩4 ↩5

  37. IEA ↩