Providing Operation and Maintenance Services at 84MW New Bong Escape Hydroelectric Power Complex Mirpur AJK and at 225MW Combined Cycle Power Plant at Narowal. Tenaga Nasional Berhad is the largest Electric utility company in Malaysia and also the largest power company in Southeast Asia with MYR 69.8 billion worth of assets. It serves over seven million customers throughout Peninsular Malaysia and also the eastern state of Sabah through Sabah Electricity Sdn Bhd. TNB's core activities are in the generation, transmission and distribution of electricity. Other activities include repairing, testing and maintaining power plants, providing engineering, procurement and construction services for power plants related products, assembling and manufacturing high voltage switchgears, coal mining and trading. Operations are carried out in Malaysia, Mauritius, Pakistan, India and Indonesia.