Malaysia’s utility firm Tenaga Nasional Berhad (TNB) has on Monday commissioned the 100 megawatt (MW) / 400 megawatt-hour (MWh) Santong Battery Energy Storage System (BESS) at the 132/33kV Santong BESS Main Intake Substation (PMU), Dungun, Terengganu, making it the first BESS in Malaysia connected to the grid.