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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
Croatia · electricity network
Croatia power grid
OverWatts maps 2,078 km of Croatia's electricity transmission network across 128 line segments and 7 substations, the 87th most-mapped grid of 153 countries. Its backbone is extra-high voltage (380–764 kV), carrying 1,057 km — 51% of the mapped length, with the highest tagged voltage at 400 kV. That works out to 36.2 km per 1,000 km² of land — strong OpenStreetMap coverage, ahead of 75% of mapped countries. It is connected to 4 neighbouring grids by 4,950 MW of existing cross-border transfer capacity, with a further 1,244 MW planned.
OpenStreetMap coverage
This grades how completely OpenStreetMap has drawn Croatia'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. 48% of segments carry a real line name and 0% an operator tag.
Mapped line length by voltage
- 380–764 kV1,057 km 51%
- 220–379 kV1,021 km 49%
128 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 Croatia
- Slovenia2.0 GW
- Hungary1.7 GW
- Bosnia and Herzegovina750 MW
- Serbia500 MW
- Bosnia and Herzegovina644 MW · planned
- Serbia600 MW · planned
5.0 GW existing · 1.2 GW planned · 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.
How Croatia compares · mapped grid by country
- 1. People's Republic of China624,300 km
- 85. Mongolia2,138 km
- 86. Cambodia2,080 km
- 87. Croatia2,078 km
- 88. Senegal2,061 km
- 89. Taiwan2,052 km
Frequently asked
- How big is Croatia's transmission network?
- OverWatts maps 2,078 km of transmission line in Croatia, across 128 segments, plus 7 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 Croatia's grid?
- Most of the mapped network is extra-high voltage (380–764 kV): 1,057 km of 2,078 km. The highest voltage tagged anywhere in the country is 400 kV.
- How complete is the grid map for Croatia?
- Strong — 36.2 km of mapped line per 1,000 km² of land, ahead of 75% 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.
- What interconnectors connect Croatia to its neighbours?
- 4,950 MW of cross-border transfer capacity to Slovenia, Hungary, Bosnia and Herzegovina, Serbia, plus 1,244 MW planned. Capacities are from the Global Transmission Database (v1.0, 2023).
Elsewhere in Croatia
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.