KEPCO completes 978 MW battery storage project

Korea Electric Power Corp. (KEPCO) has officially finished construction works on a massive battery energy storage project in the city of Miryang, in Gyeongsangnam-do Province.

Billed as Asia’s largest battery energy storage system for grid stabilization purposes, the system has a power output of 978 MW and a storage capacity of 889 MWh.

The ceremony marking the completion of construction was held on Thursday, September 27, at the 154 kV Bubuk Substation in Miryang.

The project broke ground in 2022, following a two-year preliminary feasibility study. It was carried out in phases and across KEPCO’s six substations (Yeongju, Hamyang, Yesan, Yeongcheon, Shinnamwon, and Bubuk).

The final and the biggest portion of the project – the 336 MW battery energy storage system at the Bubuk substation in the Nano Industrial Complex, Miryang-si, Gyeongsangnam-do – was switched on in July.

A total of 14 companies, including Hyosung Heavy Industries, LS Electric, HD Hyundai Electric, Samsung SDI, and LG Energy Solution, participated in the project, which came with a price tag of KRW 830 billion won ($632 million).

KEPCO delivered the project in line with the 9th Basic Electricity Supply and Demand Plan, which aims for a 40% share of renewable energy in Korea’s electricity mix by 2034.

The Korean utility has laid down plans to build another 300 MW battery energy storage system, which it plans to deliver by 2028.