Indonesia Speeds Up Pumped-Storage Power Project in West Java

RRI.CO.ID, Jakarta - Indonesia is accelerating the development of green energy infrastructure to strengthen the national power system, with the Upper Cisokan Hydroelectric Power Plant in West Bandung Regency, West Java, projected to become the country’s first pumped-storage facility.

The 1,040-megawatt plant is designed to enhance the stability of the national power grid, particularly as renewable energy sources such as solar and wind expand. The project is also expected to serve as a cornerstone of the Java-Bali power grid.

“The Upper Cisokan project is being developed to help maintain electricity supply stability amid the growth of renewable energy sources, such as solar and wind power,” said Chairani Rachmatullah, President Director of PLN Enjiniring, a subsidiary of state-owned electricity company PT PLN, in Jakarta on Tuesday, May 26, 2026, as quoted by Antara.

Chairani explained that pumped-storage technology functions like a giant water-based battery. When electricity production exceeds demand, water is pumped into the upper reservoir. When consumption rises, the stored water is released to generate power.

She emphasized that pumped storage will be a crucial component of Indonesia’s future energy system, providing a more flexible, reliable, and stable electricity supply as the country transitions to a low-emission energy system.

The Upper Cisokan project is noted for its complex engineering, integrating a dam, high-pressure water tunnels, and underground power generation facilities into a single system. PLN Enjiniring is responsible for engineering supervision, quality assurance, technical assistance, project management, and construction oversight.

“Upper Cisokan is not just a power plant project, but part of the foundation for Indonesia’s future energy system,” Chairani said.

She added that PLN Enjiniring continues to strengthen its role in supporting national green energy development. “PLN Enjiniring is ready to support the transformation of the electricity sector toward cleaner, more reliable, and sustainable energy,” said Chairani. ***