Asian Development Bank Backs Cambodia with Over US$63 Million for Gigantic Energy Storage Project

The Asian Development Bank (ADB) has approved a US$63.44 million financing package to support the construction of a large-scale battery energy storage system (BESS) in Cambodia. The 500 MWh project is expected to enhance grid stability, increase the share of renewable energy to 70%, and strengthen cross-border electricity trade with Vietnam.

Large Battery at the Takeo Substation

The centerpiece of the investment is a 250 MW / 500 MWh utility-scale battery energy storage system, which will be installed at the Takeo substation. The facility will store surplus electricity generated from renewable energy sources during periods of high production and discharge it back into the grid during peak demand.

The project is designed to address the rapidly growing electricity demand in southern Cambodia, driven by:

• rapidly expanding industrial zones,
• modern agricultural and food-processing facilities,
• growing urban areas.

Energy Bridge with Vietnam and the ASEAN 2045 Vision

The new battery storage system will play a key role in expanding cross-border electricity trade and strengthening grid integration with neighboring Vietnam, including supporting Cambodia’s electricity imports. The project represents an important step toward the ASEAN Power Grid, an initiative aimed at fully integrating the electricity systems of Southeast Asian countries by 2045.

According to the ADB, the project will also improve Cambodia’s energy security at a time of global energy uncertainty. The country remains heavily dependent on imported fossil fuels for power generation, leaving its economy exposed to volatile fuel prices and geopolitical supply risks.

The battery storage system will help Cambodia safely achieve its ambitious target of sourcing 70% of its electricity from renewable energy by 2030. It is estimated to reduce greenhouse gas emissions by up to 27,700 tonnes per year.

Financing Structure and Support for Women

In addition to building the energy storage facility, the project includes capacity-building programs for staff at the state-owned utility Electricité du Cambodge, focusing on the operation and management of modern power systems. It also supports the development of a regulatory framework for battery energy storage and promotes greater participation of women in technical and leadership roles within the energy sector.

The US$63.44 million financing package consists of:

• US$40 million in a concessional loan from the Asian Development Bank (ADB),
• US$5 million in a grant from the Asian Development Fund (ADF),
• US$18.44 million in co-financing provided by the Green Climate Fund (GCF) and the Government of the United Kingdom.