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Asset classes
- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
- Oil & Gas Field7,055
- Coal / Uranium Mine5,382
- Pipeline4,951
- Cement Plant3,513
- Data Centre3,283
- Iron & Steel Plant1,293
- LNG Terminal1,198
- Grid Storage965
- Iron Ore Mine949
- Chemical Plant868
- Interconnector704
- Export Terminal519
- Refinery279
- Storage / Tank Farm38
- Oil / Commodity Contract19
- Hydrogen Project18
- Carbon Capture (CCS)16
Chokepoints
Thailand · electricity network
Thailand power grid
OverWatts maps 12,600 km of Thailand's electricity transmission network across 776 line segments and 36 substations, the 27th most-mapped grid of 153 countries. Its backbone is high voltage (220–379 kV), carrying 7,982 km — 63% of the mapped length, with the highest tagged voltage at 500 kV. That works out to 24.6 km per 1,000 km² of land — moderate OpenStreetMap coverage, ahead of 65% of mapped countries. It is connected to 3 neighbouring grids by 6,037 MW of existing cross-border transfer capacity.
OpenStreetMap coverage
This grades how completely OpenStreetMap has drawn Thailand'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. 1% of segments carry a real line name and 6% an operator tag.
Mapped line length by voltage
- 380–764 kV4,610 km 37%
- 220–379 kV7,982 km 63%
776 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 Thailand
6.0 GW existing · capacities from the Global Transmission Database v0.1 (CC BY 4.0), existing as of 2023
On the interactive map
Load against the network
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 Thailand's network
- EGAT46 98%
- Nam Ngum 2 Power Co Ltd1 2%
Segment counts from OSM `operator` tags, merged across spellings. Present on 6% of segments — this ranks who is recorded, not market share.
How Thailand compares · mapped grid by country
- 1. People's Republic of China624,300 km
- 25. Pakistan14,600 km
- 26. Chile14,200 km
- 27. Thailand12,600 km
- 28. Colombia12,600 km
- 29. Peru11,800 km
Frequently asked
- How big is Thailand's transmission network?
- OverWatts maps 12,600 km of transmission line in Thailand, across 776 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 Thailand's grid?
- Most of the mapped network is high voltage (220–379 kV): 7,982 km of 12,600 km. The highest voltage tagged anywhere in the country is 500 kV.
- How complete is the grid map for Thailand?
- Moderate — 24.6 km of mapped line per 1,000 km² of land, ahead of 65% 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 Thailand?
- EGAT, Nam Ngum 2 Power Co Ltd are tagged as operators on mapped segments. Operator tags are present on 6% of Thailand's segments, so this ranks who is *recorded*, not market share.
- What interconnectors connect Thailand to its neighbours?
- 6,037 MW of cross-border transfer capacity to Laos, Malaysia, Cambodia. Capacities are from the Global Transmission Database (v1.0, 2023).
Elsewhere in Thailand
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.