tenaga nasional berhad (abbreviated as tnb; tena, myx: 5347), also known as tenaga nasional or simply tenaga, is the malaysian electricity company and is the only electric utility company in peninsular malaysia and also the largest publicly-listed power company in southeast asia with myr 99.03 billion worth of assets. it serves over 8.4 million customers throughout peninsular malaysia (except sarawak) and 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.
tenaga nasional is one of the 10 companies under khazanah nasional, malaysian sovereign wealth fund and also one of the 13 malaysian companies listed on the forbes global 2000 in 2018
huatech has supplied more than thousands of ams and vep to the tnb through local partner since 2006, and special design the veg which is apply to the gas insulated switchgear.