Mapai – Lachau Line is a 500kV overhead line from Mapai, Selangor, Malaysia, to Lachau, Sarawak, Malaysia.

Construction works on the Mapai – Lachau Line project was commissioned in 2017.


The Mapai – Lachau Line, which is an overhead line, is being operated by Sarawak Energy. The Mapai – Lachau Line is a new line. The line carries alternating current (AC) through double circuit cable.

Mapai – Lachau Line project development status

The development of the Mapai – Lachau Line project was approved by The Energy Commission and the project works were completed in 2017.

About Sarawak Energy

Sarawak Energy Bhd (Sarawak Energy), is a state-owned investment holding company that generates, transmits, distributes and sells electricity. The company generates power using sources such as coal, gas and hydro. It supplies electricity to commercial, residential and industrial customers in the State of Sarawak in Malaysia. The company operates gas-fired open cycle power plant in Tanjung Kidurong, Bintulu; coal-fired steam-turbine power plant in Kampung Geobilt, Kuching; and coal-fired power station in Matadeng, Mukah.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.