TNB Launches Santong BESS, Malaysia’s First Battery Storage System Connected to the National Grid

Tenaga Nasional Berhad (TNB) has launched the Santong Battery Energy Storage System (BESS), marking the first grid-connected battery storage project in Malaysia and a key milestone in the country’s energy transition roadmap.

The project is directly connected to Malaysia’s national electricity grid, enabling it to provide system-level services such as grid stability support, frequency regulation, and peak demand management. The deployment represents an important step in integrating advanced flexibility technologies into the country’s power infrastructure.

Malaysia has been gradually expanding its renewable energy ambitions, with increasing focus on solar deployment and grid modernization. The introduction of utility-scale battery storage is expected to complement these efforts by addressing intermittency challenges and improving system reliability.

According to Tenaga Nasional Berhad, the Santong BESS will play a key role in enhancing operational flexibility and supporting the integration of higher shares of renewable energy in the national grid. The project also reflects the utility’s broader strategy to modernize Malaysia’s electricity system in line with long-term energy transition objectives.

Battery energy storage systems are increasingly being recognized across global markets as essential infrastructure for enabling higher penetration of renewables while maintaining grid stability. The launch of Malaysia’s first grid-connected BESS aligns the country with a growing number of economies deploying storage at scale.

As Southeast Asia continues to experience rapid electricity demand growth, investments in grid flexibility technologies such as BESS are expected to become increasingly important in supporting both energy security and decarbonization goals.