On April 23rd, LS ELECTRIC officially held a groundbreaking ceremony for a large-scale Energy Storage System (ESS) construction project in Hallim-eup, Jeju City, South Korea. The project boasts a 10MW power conversion system (PCS) and a storage capacity of up to 40MWh. This significant development marks a crucial step by LS ELECTRIC in addressing urgent issues related to grid stabilization, arising from the rapid increase in electricity production from renewable sources such as solar and wind energy on Jeju Island.
The ceremony was attended by around 50 guests, including local residents of Hallim-eup—where the ESS system will be installed—as well as representatives from Korea Power Exchange, Korea Electric Power Corporation (KEPCO), Igis Asset Management, Geonhwa, SPV, and Eco Grid Solution. These strategic partners are all contributing to the successful implementation of this landmark project.
Responding to New Demands in the Age of Renewable Energy
With the rapid growth of solar and wind power in Jeju—one of South Korea’s regions with the highest share of renewable energy—excess electricity production has become a regular occurrence. This frequently forces authorities to implement output control measures, resulting in wasted energy and highlighting the need for efficient energy storage and dispatch solutions.
In this context, the ESS system developed by LS ELECTRIC serves not only as a “giant battery” capable of storing surplus energy during peak production periods, but also as a tool for redistributing electricity during peak consumption hours. This marks a major advancement toward stabilizing the power grid and enhancing the utilization efficiency of renewable energy on Jeju Island.
The project was selected through a rigorous bidding process in November 2023. Together with partners such as Igis Asset Management, Geonhwa, and SPV, LS ELECTRIC was appointed to execute the first phase of the “Jeju Long-Duration Battery Energy Storage System (BESS) Construction Project.” The project is scheduled for completion and commercial operation by November this year.
End-to-End Leadership from EPC to Operations
As a leading smart energy company in South Korea—with a proven track record both domestically and in international markets like Japan and the UK—LS ELECTRIC will handle the full scope of EPC (Engineering, Procurement, and Construction) operations. The company will also manage the ESS system’s operations for 15 years following its commissioning.
Mr. Son Chang-hee, Head of LS ELECTRIC’s Smart Energy Division, stated:
“We are committed to working closely with local residents, Korea Power Exchange, KEPCO, and other stakeholders to ensure the successful and timely completion of this project. Our aim is to operate the system efficiently and truly contribute to the stabilization of Jeju’s power grid. We believe this project will serve as a major milestone in the development of our smart energy business, a key pillar of LS ELECTRIC’s sustainable growth strategy.”
Long-Duration ESS – An Inevitable Trend in the Future of Energy
An ESS (Energy Storage System) is a technology that temporarily stores electrical energy for use when it is most needed, particularly useful for balancing uneven supply and demand. ESS solutions are typically categorized into short-duration (usually under two hours) and long-duration (typically four hours or more). Long-duration ESS systems, with their ability to discharge electricity over extended periods, are ideal for mitigating the fluctuations caused by renewable energy sources and reducing the frequency of output curtailment.
As wind and solar power continue to proliferate, the demand for long-duration ESS is growing rapidly—not only in South Korea but globally. Jeju, where renewable power often exceeds consumption, is a “natural laboratory” for testing the effectiveness of such long-duration storage models.
The large-scale ESS project in Hallim, spearheaded by LS ELECTRIC, is not only a technical solution to current grid challenges but also part of the company’s broader strategy toward sustainable, green, and intelligent development. With a long-term vision, LS ELECTRIC continues to assert its pioneering role in the new energy era—where efficiency, flexibility, and sustainability are the core benchmarks.
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