The Chajiao substation in southern Cambodia is about to welcome a 250 MW grid level battery energy storage station. The Asian Development Bank approved a $63.44 million financing plan by the end of June 2026 to support this critical facility through preferential loans and joint funding from multiple countries. This project directly targets the pain point of Cambodia's power system - with the surge in manufacturing and urban electricity consumption, the national electricity demand will jump by 60% within five years, and the volatility caused by the fivefold increase in solar energy installation capacity in five years is impacting the old power grid.

New breakthroughs in energy storage technology

Different from traditional equipment, this system adopts a network construction technology route, similar to installing intelligent switches on the power grid. It can actively construct a voltage frequency framework to fill the power gap in milliseconds during photovoltaic dips or cross-border transmission interruptions. In 2025, a transmission line failure in Cambodia caused widespread power outages. The new energy storage station will effectively prevent such accidents and increase the renewable energy consumption capacity of the southern industrial zone by 30%.

Regional power grid stabilizer

The deeper significance of the project lies in activating the regional power network. The Chajiao substation is a hub for Cambodia to import electricity from Vietnam. The energy storage system provides frequency regulation and voltage support, increasing the stability of cross-border electricity transactions by 40%. This lays a solid foundation for the ASEAN power grid plan - when Vietnam purchased electricity from China due to power shortages but spent a lot of money building a physically isolated power grid, Cambodia chose to use Chinese technical standards to build a new power ecology, highlighting a completely different energy cooperation mindset. Keywords: battery energy storage, new energy projects

At present, Cambodia Power Company has invested $420000 in supporting funds. After the system is put into operation, it can reduce carbon emissions by 27700 tons per year, equivalent to stopping 27000 cars. With ASEAN setting a target of 45% renewable energy by 2030, smart energy storage that integrates peak shaving, voltage regulation, and cross grid collaboration is becoming the core pivot of Southeast Asia's energy transformation.Editor/Cheng Liting