South Korea

South Korea is reshaping its energy system around nuclear, renewables and clean industry.

South Korea is pursuing a technology-driven energy transition, combining nuclear power, renewable energy, energy storage and hydrogen while decarbonising one of Asia's most industrialised economies.

Big Picture

South Korea's energy transition is different from many other Asian markets.

Rather than relying primarily on renewables, the country is pursuing a multi-technology clean-energy mix. Nuclear power is being expanded alongside solar and wind, while batteries, hydrogen and other clean technologies are expected to provide flexibility and help reduce emissions.

The strategy is closely connected to South Korea's industrial competitiveness. Semiconductors, batteries, automobiles, steel, petrochemicals and data centres require increasingly reliable supplies of electricity. The government therefore views energy security and decarbonisation as increasingly interconnected.

South Korea's isolated grid makes this particularly important: unlike many European markets, it cannot rely heavily on neighbouring countries for electricity imports or exports.

Policy & Targets

South Korea has legally established a 2050 carbon-neutrality goal and currently targets a 40% reduction in greenhouse-gas emissions from 2018 levels by 2030.

The country's new 2035 NDC, finalised in November 2025, raises the ambition to a 53–61% reduction from 2018 levels by 2035.

The 11th Basic Plan for Electricity Supply and Demand, covering 2024–2038, provides the main roadmap for the electricity system. It envisages greater contributions from nuclear and renewable power while reducing the role of coal.

The plan targets renewable electricity at 18.8% in 2030, 26.0% in 2035 and 29.2% in 2038. Nuclear is projected to reach 31.8% in 2030 and 35.2% in 2038.

Power Market

South Korea's electricity system remains heavily dependent on fossil fuels, but its generation mix is changing.

The 11th Basic Plan projects nuclear generation increasing from 30.7% in 2023 to 31.8% in 2030 and 35.2% in 2038. Renewable generation rises from 8.4% in 2023 to 18.8% in 2030 and 29.2% in 2038.

Coal is expected to decline substantially, from 31.4% of generation in 2023 to 17.2% in 2030 and 10.1% in 2038.

The result is a power system increasingly built around nuclear + renewables, supported by gas, storage and emerging hydrogen-based generation.

Grid & Storage

Grid flexibility is becoming a critical issue as South Korea adds more variable renewable generation.

The country has an isolated electricity system with no interconnections to neighbouring countries, making domestic flexibility, transmission investment and storage particularly important.

South Korea launched its first Energy Storage System Central Contract Market on Jeju and expanded the mechanism to the mainland in 2025.

A second ESS central-contract market announced in November 2025 called for 540 MW of storage, including 500 MW on the mainland and 40 MW on Jeju.

For Energy Insider Asia, this is an important market to watch because South Korea is simultaneously a major battery manufacturing hub and a growing domestic market for grid-scale storage.

Industry & New Energy

South Korea's energy transition is inseparable from its industrial strategy.

The country is a major global player in batteries, semiconductors, automobiles, shipbuilding and advanced manufacturing. Decarbonising these industries will require large quantities of reliable, increasingly low-carbon electricity.

Hydrogen is also being developed as a new energy pathway. South Korea operates separate hydrogen power bidding mechanisms for clean hydrogen and general hydrogen, with the clean hydrogen market designed around fuels meeting Korea's certification standard of no more than 4 kgCO₂e per kg of hydrogen. The 2025 clean-hydrogen power bidding volume was 3,000 GWh per year, with 15-year contracts.

Battery technology is another strategic advantage. The IEA estimates that Korean companies accounted for 55% of battery manufacturing capacity outside China in 2024.

What We're Watching

1. Nuclear expansion
South Korea is proceeding with the nuclear expansion outlined in its 11th Basic Plan, including two new large reactors and plans for an SMR.

2. Renewable deployment
Solar and wind will need to expand significantly to meet the country's electricity-generation targets, despite land and permitting constraints.

3. Grid-scale batteries
The expansion of Korea's ESS central-contract market could create a much larger domestic market for grid-scale storage.

4. Clean hydrogen
The hydrogen power bidding market is an important test of whether clean hydrogen can move from policy ambition towards commercial-scale power generation.

5. Industrial decarbonisation
Steel, petrochemicals, batteries and semiconductors will remain central to South Korea's net-zero strategy.

6. Power demand from AI and data centres
Rapid growth in digital infrastructure is likely to increase pressure on an already constrained electricity system, making reliable low-carbon generation and grid capacity increasingly important.

Energy Insider View

South Korea's transition is not a simple renewables story. It is a competition between technologies, industrial priorities and energy security.

The country's biggest advantage is its world-class industrial base in batteries, electronics, automobiles and advanced manufacturing. Its biggest challenge is the combination of limited land, high industrial electricity demand and an isolated grid.

The emerging South Korean model is therefore becoming clear: nuclear for firm low-carbon power, renewables for additional clean generation, batteries for flexibility, hydrogen for harder-to-abate applications and advanced manufacturing to capture the economic value of the transition.

For Asia's energy market, South Korea will be an important test of whether an advanced manufacturing economy can decarbonise while maintaining industrial competitiveness.

Sources

ENERGY INSIDER ASIA

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