How big is Malaysia's transmission network?

OverWatts maps 7,290 km of transmission line in Malaysia, across 829 segments, plus 16 substations. This is mapped length from OpenStreetMap, not an operator-reported total — where OSM is incomplete the figure is a floor, never a ceiling.

What voltage is Malaysia's grid?

Most of the mapped network is high voltage (220–379 kV): 6,100 km of 7,290 km. The highest voltage tagged anywhere in the country is 500 kV.

How complete is the grid map for Malaysia?

Moderate — 21.5 km of mapped line per 1,000 km² of land, ahead of 59% of the 153 countries with any mapped grid. Coverage grades how completely OpenStreetMap has drawn the network, not how much network exists; large, sparsely-populated countries score low for geographic reasons alone.

Who operates the grid in Malaysia?

Tenaga Nasional, Sabah Electricity, Sarawak Energy Berhad and 1 others are tagged as operators on mapped segments. Operator tags are present on 8% of Malaysia's segments, so this ranks who is *recorded*, not market share.

What interconnectors connect Malaysia to its neighbours?

1,610 MW of cross-border transfer capacity to Singapore, Thailand, Indonesia. Capacities are from the Global Transmission Database (v1.0, 2023).

Malaysia · electricity network

Malaysia power grid

OverWatts maps 7,290 km of Malaysia's electricity transmission network across 829 line segments and 16 substations, the 41st most-mapped grid of 153 countries. Its backbone is high voltage (220–379 kV), carrying 6,100 km — 84% of the mapped length, with the highest tagged voltage at 500 kV. That works out to 21.5 km per 1,000 km² of land — moderate OpenStreetMap coverage, ahead of 59% of mapped countries. It is connected to 3 neighbouring grids by 1,610 MW of existing cross-border transfer capacity.

Open the grid lens →Malaysia profile →

7,290 km

Mapped transmission line

Substations

#41

of 153 mapped grids

1.6 GW

cross-border · 3 neighbours

500 kV

Highest voltage

OpenStreetMap coverage

Moderate21.5 km / 1,000 km²ahead of 59% of 153 mapped countries

This grades how completely OpenStreetMap has drawn Malaysia's network — not how much network exists. Large, sparsely-populated countries score low for geographic reasons alone, and every kilometre here is mapped length, so the totals are a floor rather than an operator-reported figure. 0% of segments carry a real line name and 8% an operator tag.

Mapped line length by voltage

380–764 kV1,189 km 16%
220–379 kV6,100 km 84%

829 segments · a segment is credited to the country containing its midpoint, so a border-crossing line counts once, on one side.

Cross-border links from Malaysia

Singapore1.0 GW
Thailand380 MW
Indonesia230 MW

1.6 GW existing · capacities from the Global Transmission Database v0.1 (CC BY 4.0), existing as of 2023

On the interactive map

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Load against the network

37.1 GW

Operating generation

Data centres mapped

456

km of line per substation

21.5

km per 1,000 km²

Where there is room to connect a new load depends on published hosting capacity, which most operators release only as their own map. OverWatts does not yet ingest those feeds, so these are the density measures the open data supports — generation and mapped demand against mapped network — not a headroom figure.

Operators tagged on Malaysia's network

Segment counts from OSM `operator` tags, merged across spellings. Present on 8% of segments — this ranks who is recorded, not market share.

How Malaysia compares · mapped grid by country

1. People's Republic of China624,300 km
39. Indonesia7,547 km
40. Syria7,365 km
41. Malaysia7,290 km
42. Belarus6,884 km
43. Nigeria6,822 km

Frequently asked

How big is Malaysia's transmission network?: OverWatts maps 7,290 km of transmission line in Malaysia, across 829 segments, plus 16 substations. This is mapped length from OpenStreetMap, not an operator-reported total — where OSM is incomplete the figure is a floor, never a ceiling.
What voltage is Malaysia's grid?: Most of the mapped network is high voltage (220–379 kV): 6,100 km of 7,290 km. The highest voltage tagged anywhere in the country is 500 kV.
How complete is the grid map for Malaysia?: Moderate — 21.5 km of mapped line per 1,000 km² of land, ahead of 59% of the 153 countries with any mapped grid. Coverage grades how completely OpenStreetMap has drawn the network, not how much network exists; large, sparsely-populated countries score low for geographic reasons alone.
Who operates the grid in Malaysia?: Tenaga Nasional, Sabah Electricity, Sarawak Energy Berhad and 1 others are tagged as operators on mapped segments. Operator tags are present on 8% of Malaysia's segments, so this ranks who is *recorded*, not market share.
What interconnectors connect Malaysia to its neighbours?: 1,610 MW of cross-border transfer capacity to Singapore, Thailand, Indonesia. Capacities are from the Global Transmission Database (v1.0, 2023).

Elsewhere in Malaysia

Transmission lines Substations Power plants Data centres

Network geometry: OpenStreetMap (ODbL) © OpenStreetMap contributors, ingested and measured by OverWatts · derived 2026-07-26. Counts every mapped line of 220 kV and above; the map layer draws the ≥380 kV backbone only, so it shows less than is measured here.