Tenaga Nasional Berhad
Malaysia's principal electricity utility, operating across power generation, transmission, distribution and retail.
Last updated November 4, 2026
AI crawler reads
No AI crawler has read this profile since Oct 28, 2026.
Overview
Tenaga Nasional Berhad, commonly known as TNB or Tenaga Nasional, is Malaysia's principal electricity utility and one of Southeast Asia's largest publicly listed power companies. The group operates across the electricity value chain: it generates power, manages the national transmission grid, distributes electricity, supplies retail customers and provides a range of engineering, infrastructure and energy-related services. Its core regulated utility footprint is concentrated in Peninsular Malaysia, while Sabah Electricity provides electricity services in Sabah and Labuan. Sarawak has a separate electricity utility and is outside TNB's principal Peninsular Malaysian service territory. TNB's institutional history reaches back to the Central Electricity Board, established in 1949 after the reconstitution of Malaysia's electricity administration. The board consolidated generation and distribution assets and helped build the interconnected electricity system that would eventually serve the Malay Peninsula. In 1965 it became the Lembaga Letrik Negara, or National Electricity Board, and progressively absorbed or replaced a number of municipal and private electricity operators. By the 1980s, the board supplied electricity throughout Peninsular Malaysia. Malaysia's privatization policy led to the creation of Tenaga Nasional Berhad in 1990 under the Electricity Supply Successor Company Act 1990. TNB succeeded the National Electricity Board and became the corporate vehicle for the country's principal electricity supply business. Although electricity generation has increasingly involved independent power producers and sector regulation has evolved, TNB has retained a central role through its ownership and operation of major generation assets, the national grid and the Peninsular Malaysian distribution network. The company's activities include thermal and hydroelectric generation, high-voltage transmission, medium- and low-voltage distribution, customer service, billing and electricity retailing. Its transmission network operates at 132, 275 and 500 kilovolts and is interconnected with Thailand and Singapore. TNB's wider business portfolio includes power-plant engineering, procurement and construction, maintenance and testing, high-voltage switchgear and equipment manufacturing, electrical cables and transformers, fuel-related activities, research and development, property development and project management. The group also supports higher education through Universiti Tenaga Nasional. In 2018 TNB separated its former distribution organization into distinct Distribution Network and Retail divisions. The change was intended to sharpen operational accountability and improve customer and commercial services. The retail business has also pursued rooftop solar, smart-energy services, multi-utility billing, digital customer support and services extending beyond conventional kilowatt-hour sales. In 2019 and 2020 the group reorganized domestic generation and retail activities, including the establishment and operationalization of TNB Genco as a wholly owned generation subsidiary. TNB has increasingly presented itself as an energy-transition company as well as a conventional utility. Its generation portfolio includes hydroelectric assets, while the group has pursued renewable-energy investments and international opportunities. In 2021 it became a part owner of the repowered Blyth Offshore Wind Farm in England. The company also maintains international engineering, investment and operating interests across several countries. Its corporate communications have used the slogans 'Powering the Nation' and, from 2013, 'Better. Brighter.' TNB remains an active, publicly traded Malaysian company. Its importance derives from its role in electricity security, national infrastructure and customer supply, as well as from the scale of its generation, grid and distribution assets. The business is subject to Malaysia's electricity regulation and to the changing…
History
Tenaga Nasional's institutional predecessor was the Central Electricity Board, or Lembaga Letrik Pusat, which began operating on 1 September 1949. It inherited major electricity-development projects associated with the postwar reconstruction of Malaya, including the Connaught Bridge Power Station, the Cameron Highlands hydroelectric project and the development of an interconnected national grid. In its early period, the board owned dozens of generating stations using steam, hydroelectric and diesel technologies. On 22 June 1965, the Central Electricity Board was renamed the Lembaga Letrik Negara, or National Electricity Board of the States of Malaya. The renamed board expanded its system and consolidated electricity supply across the peninsula. During the 1960s through the 1980s, it replaced or absorbed several municipal and private electricity suppliers, including the Penang municipal electricity operation and the Perak River Hydro Electric Power Company and its related distribution business. By the 1980s, the National Electricity Board was supplying the whole of Peninsular Malaysia. The Malaysian government announced a privatization policy in 1988. Legislation was subsequently enacted to replace the existing electricity-law framework and establish a successor corporation. Tenaga Nasional Berhad was formed in 1990 under the Electricity Supply Successor Company Act 1990, taking over the role and assets of the National Electricity Board. The change transformed the principal public electricity board into a corporatized and publicly listed utility while preserving its central role in generation, transmission, distribution and supply. TNB developed into a vertically integrated electricity group. Its transmission business operates the National Grid at 132, 275 and 500 kilovolts, with cross-border connections to Thailand and Singapore. Its distribution network serves customers in Peninsular Malaysia at a range of medium- and low-voltage levels. Sabah Electricity separately performs comparable generation, distribution and retail functions in Sabah and Labuan. TNB's generation portfolio includes thermal and hydroelectric facilities, and the company has also been involved in power-plant engineering, maintenance, equipment manufacturing and related technical services. The group reorganized its customer and network functions in 2018, splitting the former Distribution Division into Distribution Network and Retail divisions. The retail organization was designed to improve collections, customer service and commercial development while promoting rooftop solar, smart-energy products, multi-utility billing, broadband and other services beyond conventional electricity sales. A further internal restructuring in 2019 and 2020 separated domestic generation and retail businesses and established TNB Genco as a wholly owned generation subsidiary. TNB's activities have expanded beyond Malaysia through investments, projects and technical operations in markets including the United Kingdom, Ireland, Turkey, Kuwait, Saudi Arabia, Pakistan, India, Cambodia and Australia. In 2021, the group became a part owner of the repowered Blyth Offshore Wind Farm in England, reflecting its interest in renewable generation and the wider energy transition. TNB also exports electricity to Singapore through a partnership involving TNB Power Generation and YTL PowerSeraya. In addition to utility operations, the group has interests in engineering, procurement and construction, high-voltage switchgear, transformers, electrical cables, research and development, property development and project management. It provides higher education through Universiti Tenaga Nasional. TNB's public identity has been associated with the slogan 'Powering the Nation' and, since 2013, with the 'Better. Brighter.' corporate campaign. The company remains Malaysia's dominant electricity infrastructure brand and a major publicly traded regional power group.
- 2021
TNB invests in Blyth Offshore Wind Farm
[1]TNB became a part owner of the repowered Blyth Offshore Wind Farm in England.
- 2020
Generation and retail restructuring completed
[1]TNB completed its internal restructuring of domestic generation and retail operations, including the creation of TNB Genco.
- 2018
Distribution organization is divided
[1]TNB split its former Distribution Division into Distribution Network and Retail divisions.
- 2013
Better. Brighter. corporate platform introduced
[1]TNB adopted the 'Better. Brighter.' corporate slogan and campaign platform.
- 1990
Tenaga Nasional Berhad is formed
[1]TNB was established under the Electricity Supply Successor Company Act 1990 as successor to the National Electricity Board.
- 1982
Perak electricity operations consolidated
[1]The National Electricity Board replaced the Perak River Hydro Electric Power Company and its associated distribution company.
- 1965
Central Electricity Board renamed National Electricity Board
[1]On 22 June, the organization became the Lembaga Letrik Negara, or National Electricity Board of the States of Malaya.
- 1949
Central Electricity Board begins operations
[1]The Central Electricity Board, or Lembaga Letrik Pusat, began operating on 1 September and inherited major postwar electricity-generation and grid-development projects.
Products and positioning
A national-scale, vertically integrated electricity utility combining regulated grid and retail operations with generation, engineering, international investments and energy-transition activities.
Power generation
Electricity generation
TNB generates electricity through a portfolio that includes thermal and hydroelectric assets. TNB Power Generation, also known as TNB Genco, owns and operates major generation facilities in Peninsular Malaysia and is the group's principal domestic generation vehicle.
Electricity transmission
National Grid transmission
TNB operates Malaysia's high-voltage National Grid in Peninsular Malaysia. The system uses 132 kV, 275 kV and 500 kV infrastructure and has interconnections with Thailand and Singapore, supporting bulk power transfer and system reliability.
Electricity distribution
Electricity distribution
The Distribution Network division plans, constructs, operates, repairs and maintains TNB's Peninsular Malaysian distribution assets, including 33 kV, 22 kV, 11 kV, 6.6 kV and 415/240 V networks.
Electricity retail · 2018
Electricity retail services
TNB's Retail division provides electricity applications, billing and payment, customer support, supply advice and related energy services through state operations, service outlets and care offices. It has also pursued rooftop solar and offerings beyond conventional kilowatt-hour sales.
Engineering services
Power engineering and technical services
TNB subsidiaries and related businesses provide engineering, procurement and construction, plant testing and maintenance, project management, consultancy and technical services for electricity infrastructure and power plants.
Electrical equipment
High-voltage electrical equipment
The group has activities involving the manufacture and assembly of transformers, high-voltage switchgear and electrical cables, complementing its utility and engineering operations.
Higher education
Universiti Tenaga Nasional
Universiti Tenaga Nasional is TNB's higher-education institution and extends the group's role into education and the development of technical and professional capabilities relevant to the energy sector.
Marketing campaigns
- 2013Better. Brighter.
Malaysia · International
TNB introduced the 'Better. Brighter.' corporate slogan and campaign platform to express a more customer-oriented and future-facing brand position.
- Powering the Nation
Malaysia
TNB's long-running corporate slogan emphasizes its role in powering Malaysia and reflects the company's national infrastructure identity after privatization.
Brand decisions
2021
Invest in the repowered Blyth Offshore Wind FarmM&ABackground
TNB sought to expand its renewable-energy presence and international generation portfolio.
Action taken
The group became a part owner of the repowered Blyth Offshore Wind Farm in England.
Aftermath
The investment strengthened TNB's position in offshore wind and supported its broader energy-transition strategy.
2019
Restructure domestic generation and retail businessesStrategyBackground
TNB initiated an internal reorganization intended to improve efficiency, agility and performance.
Action taken
Domestic generation and electricity retail activities were placed into separate wholly owned structures, including TNB Genco.
Aftermath
The restructuring was completed in 2020 and gave the group dedicated operating vehicles for generation and retail.
2018
Separate Distribution Network and Retail divisionsStrategyBackground
TNB sought to improve operational accountability, collection efficiency and customer-facing commercial services.
Action taken
The former Distribution Division was divided into distinct Distribution Network and Retail divisions.
Aftermath
Network operations and retail services received separate organizational mandates, with the retail division also promoting rooftop solar and services beyond electricity consumption.
1988
Adopt privatization policy for electricity supplyStrategyBackground
The Malaysian government announced a policy of privatizing the electricity supply organization and replacing the existing legal and institutional framework.
Action taken
Legislation was enacted to establish a successor corporation to the National Electricity Board.
Aftermath
The process led to the formation of Tenaga Nasional Berhad in 1990 and the corporatization of the principal electricity utility.
Recent events
- Unconfirmed
TNB and Sime Darby Motors sign EV collaboration MoU[3]
Reported:
Tenaga Nasional and Sime Darby Motors Malaysia signed a two-year memorandum of understanding to explore initiatives supporting electric-vehicle adoption, including charging infrastructure and energy-efficient and renewable-energy initiatives.
TNB introduces residential customer relief package[4]
Reported:
Tenaga Nasional Berhad introduced a residential customer relief package with an Easy Payment Plan, a waiver of late-payment surcharges and an extension of the suspension of supply disconnections. The Easy Payment Plan is available automatically from customers’ first actual monthly bill after meter-reading operations resume.
- Unconfirmed
TNB opens Tuanku Muhriz Power Station[5]
Reported:
Tenaga Nasional's Tuanku Muhriz Power Station near Jimah was commissioned and is able to produce 2,000 MW of electricity, enough to supply two million households in Peninsular Malaysia.
TNB sponsors SAM charity golf tournament[6]
Tenaga Nasional Berhad donated RM10,000 to the 2019 Sportswriters Association of Malaysia Corporate Media Charity Golf Championship, which was scheduled to take place on Nov 24.
Sources6 sources
Cite this profile: Cite the canonical profile. /brand-wiki/tenaga-nasional · Editorial policy · How profiles are compiled