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Chokepoints
Switzerland · asset class
Grid Storages in Switzerland
Switzerland has 17 grid storages mapped on the OverWatts open energy atlas — the 12th-largest fleet of the 58 countries that hold any, and 2% of the world's mapped total. Of these, 15 operating and 2 under construction or proposed. The largest is Lago Bianco hydroelectric plant (1.0 GW).
The largest owner-operators are Axpo Power AG (6), BKW Energie AG (5) and Elektrizitätswerk Der Stadt Zürich (EWZ) (5) — Axpo Power AG alone is named on 35% of them. Half of Switzerland's grid storages in service predate 1968 (median commissioning year of the 15 with a known date), 3 came online in the past decade and the oldest still listed is Le Chatelard hydroelectric plant, dating from 1923. 2 are in the pipeline, led by Lago Bianco hydroelectric plant (1.0 GW), under construction. They account for 18% of every energy asset OverWatts maps in Switzerland.
On the interactive map
Largest grid storages in Switzerland
- Lago Bianco hydroelectric plant1.0 GW · construction
- Limmern hydroelectric plant1.0 GW · 2016
- Nant De Drance hydroelectric plant900 MW · 2022
- Mapragg hydroelectric plant280 MW · 1977
- Veytaux hydroelectric plant240 MW · 1972
- Veytaux II hydroelectric plant240 MW · 2017
- Robiei hydroelectric plant192 MW · 1968
- Ferrera 1 hydroelectric plant180 MW · 1962
- Etzelwerk Altendorf hydroelectric plant135 MW · 1937
- Tierfehd Umwaelzwerk hydroelectric plant131 MW · 2010
- Ritom Nuova hydroelectric plant120 MW · 2026 · construction
- Le Chatelard hydroelectric plant112 MW · 1923
- Mottec hydroelectric plant89 MW · 1958
- Zermeiggern hydroelectric plant74 MW · 1966
- Rempen hydroelectric plant66 MW · 1926
- Handeck III hydroelectric plant55 MW · 1976
- Peccia hydroelectric plant54 MW · 1955
Who owns Switzerland's grid storages
- Axpo Power AG6 35%
- BKW Energie AG5 29%
- Elektrizitätswerk Der Stadt Zürich (EWZ)5 29%
- Industrielle Werke Basel (IWB)5 29%
- Alpiq AG4 24%
- Swiss Federal Railways (SBB)4 24%
- Canton of Ticino3 18%
- Energie Wasser Bern (EWB)3 18%
Counts an asset once per company named as its owner or operator; a joint venture counts for each partner.
When they were built
- 1920s2
- 1930s1
- 1950s2
- 1960s3
- 1970s3
- 2010s3
- 2020s1
Median commissioning year 1968 · oldest Le Chatelard hydroelectric plant (1923) · newest Nant De Drance hydroelectric plant (2022) · 15 of 17 carry a start date
Under construction & proposed
- Lago Bianco hydroelectric plant1.0 GW · construction
- Ritom Nuova hydroelectric plant120 MW · 2026 · construction
How Switzerland compares · grid storages by country
- 1. China401
- 9. Italy23
- 10. Philippines21
- 11. South Korea18
- 12. Switzerland17
- 13. Portugal14
- 14. United Kingdom12
- 15. France9
Frequently asked
- How many grid storages are there in Switzerland?
- OverWatts maps 17 grid storages in Switzerland — 2% of the world's mapped total, the 12th-largest national fleet of the 58 countries with any.
- What is the largest grid storage in Switzerland?
- Lago Bianco hydroelectric plant, at 1.0 GW.
- Who owns the grid storages in Switzerland?
- Axpo Power AG is named as owner or operator on the most — 6 of 17 (35%). Next are BKW Energie AG (5), Elektrizitätswerk Der Stadt Zürich (EWZ) (5) and Industrielle Werke Basel (IWB) (5).
- How old are Switzerland's grid storages?
- The median commissioning year is 1968, across the 15 in service with a known start date. The oldest still listed is Le Chatelard hydroelectric plant (1923); 3 came online in the past ten years.
- What new grid storages are being built in Switzerland?
- 2 projects are under construction or proposed. The largest are Lago Bianco hydroelectric plant (1.0 GW) and Ritom Nuova hydroelectric plant (120 MW).