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Slovenia · electricity network

Slovenia power grid

OverWatts maps 846 km of Slovenia's electricity transmission network across 67 line segments and 8 substations, the 115th most-mapped grid of 153 countries. Its backbone is extra-high voltage (380–764 kV), carrying 550 km — 65% of the mapped length, with the highest tagged voltage at 400 kV. That works out to 44.3 km per 1,000 km² of land — strong OpenStreetMap coverage, ahead of 83% of mapped countries. It is connected to 3 neighbouring grids by 3,610 MW of existing cross-border transfer capacity, with a further 2,750 MW planned.

Open the grid lens →Slovenia profile →
846 km
Mapped transmission line
8
Substations
#115
of 153 mapped grids
3.6 GW
cross-border · 3 neighbours
400 kV
Highest voltage

OpenStreetMap coverage

Strong44.3 km / 1,000 km²ahead of 83% of 153 mapped countries

This grades how completely OpenStreetMap has drawn Slovenia'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. 63% of segments carry a real line name and 4% an operator tag.

Mapped line length by voltage

67 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 Slovenia

3.6 GW existing · 2.8 GW planned · 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

2.7 GW
Operating generation
106
km of line per substation
44.3
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 Slovenia's network

Segment counts from OSM `operator` tags, merged across spellings. Present on 4% of segments — this ranks who is recorded, not market share.

How Slovenia compares · mapped grid by country

Frequently asked

How big is Slovenia's transmission network?
OverWatts maps 846 km of transmission line in Slovenia, across 67 segments, plus 8 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 Slovenia's grid?
Most of the mapped network is extra-high voltage (380–764 kV): 550 km of 846 km. The highest voltage tagged anywhere in the country is 400 kV.
How complete is the grid map for Slovenia?
Strong — 44.3 km of mapped line per 1,000 km² of land, ahead of 83% 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 Slovenia?
Elektro-Slovenija, MAVIR are tagged as operators on mapped segments. Operator tags are present on 4% of Slovenia's segments, so this ranks who is *recorded*, not market share.
What interconnectors connect Slovenia to its neighbours?
3,610 MW of cross-border transfer capacity to Croatia, Austria, Italy, plus 2,750 MW planned. Capacities are from the Global Transmission Database (v1.0, 2023).

Elsewhere in Slovenia

Transmission linesSubstationsPower plantsData 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.