How big is Indonesia's transmission network?

OverWatts maps 7,547 km of transmission line in Indonesia, across 452 segments, plus 36 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 Indonesia's grid?

Most of the mapped network is extra-high voltage (380–764 kV): 4,578 km of 7,547 km. The highest voltage tagged anywhere in the country is 750 kV.

How complete is the grid map for Indonesia?

Sparse — 4.1 km of mapped line per 1,000 km² of land, ahead of 16% 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 Indonesia?

Perusahaan Listrik Negara, PLN, PT Perusahaan Listrik Negara and 3 others are tagged as operators on mapped segments. Operator tags are present on 41% of Indonesia's segments, so this ranks who is *recorded*, not market share.

What interconnectors connect Indonesia to its neighbours?

230 MW of cross-border transfer capacity to Malaysia. Capacities are from the Global Transmission Database (v1.0, 2023).

Indonesia · electricity network

Indonesia power grid

OverWatts maps 7,547 km of Indonesia's electricity transmission network across 452 line segments and 36 substations, the 39th most-mapped grid of 153 countries. Its backbone is extra-high voltage (380–764 kV), carrying 4,578 km — 61% of the mapped length, with the highest tagged voltage at 750 kV. That works out to 4.1 km per 1,000 km² of land — sparse OpenStreetMap coverage, ahead of 16% of mapped countries. It is connected to 1 neighbouring grid by 230 MW of existing cross-border transfer capacity.

Open the grid lens →Indonesia profile →

7,547 km

Mapped transmission line

Substations

#39

of 153 mapped grids

230 MW

cross-border · 1 neighbours

750 kV

Highest voltage

OpenStreetMap coverage

Sparse4.1 km / 1,000 km²ahead of 16% of 153 mapped countries

This grades how completely OpenStreetMap has drawn Indonesia'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. 25% of segments carry a real line name and 41% an operator tag.

Mapped line length by voltage

380–764 kV4,578 km 61%
220–379 kV2,931 km 39%
Voltage untagged38 km 1%

452 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 Indonesia

Malaysia230 MW

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

On the interactive map

Open the interactive map →

Load against the network

94.5 GW

Operating generation

Data centres mapped

210

km of line per substation

4.1

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 Indonesia's network

Perusahaan Listrik Negara163 87%
PLN13 7%
PT Perusahaan Listrik Negara5 3%
Pertamina Hulu Rokan3 2%
PT Perusahaan Listrik Negara (Persero) Tbk.2 1%
Perusahaan Listrik Negara / Sarawak Energy1 1%

Segment counts from OSM `operator` tags, merged across spellings. Present on 41% of segments — this ranks who is recorded, not market share.

How Indonesia compares · mapped grid by country

1. People's Republic of China624,300 km
37. Norway8,900 km
38. Romania7,845 km
39. Indonesia7,547 km
40. Syria7,365 km
41. Malaysia7,290 km

Frequently asked

How big is Indonesia's transmission network?: OverWatts maps 7,547 km of transmission line in Indonesia, across 452 segments, plus 36 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 Indonesia's grid?: Most of the mapped network is extra-high voltage (380–764 kV): 4,578 km of 7,547 km. The highest voltage tagged anywhere in the country is 750 kV.
How complete is the grid map for Indonesia?: Sparse — 4.1 km of mapped line per 1,000 km² of land, ahead of 16% 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 Indonesia?: Perusahaan Listrik Negara, PLN, PT Perusahaan Listrik Negara and 3 others are tagged as operators on mapped segments. Operator tags are present on 41% of Indonesia's segments, so this ranks who is *recorded*, not market share.
What interconnectors connect Indonesia to its neighbours?: 230 MW of cross-border transfer capacity to Malaysia. Capacities are from the Global Transmission Database (v1.0, 2023).

Elsewhere in Indonesia

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.