Installed capacity — Switzerland
What Switzerland could produce with everything running at once: installed capacity by source, as reported for 2026, next to how much has actually run.
| Source | Capacity (MW) | Of total |
|---|---|---|
| Pumped-storage hydro | 6,702+6 | 41.6% |
| Hydro reservoir | 5,799+22 | 36.0% |
| Nuclear | 2,983 | 18.5% |
| Run-of-river hydro | 632−2 | 3.9% |
How much ran at once
The highest output delivered at a single moment over the past twelve months, by source group, next to the installed capacity.
Of 16,116 MW installed, the most that ever ran at one moment was 11,333 MW — 70% of the fleet, on 28/08/2026, 12:00:00.
- Hydro 9,396/ 13,133 MW 72%
- Nuclear 2,940/ 2,983 MW 99%
The peak is read from our own generation archive, not estimated: it is a lower bound on what the fleet can do. A small ratio means the group's sources never all ran together — reservoir hydro starts at peak demand, thermal plants sit idle when they are not called. A ratio above one hundred means the declared capacity has fallen behind: the figure is declared at the start of the year while new units come online during it. Groups are compared here rather than individual source types: the same source can report capacity under lignite and generation under coal, and at group level the two meet.
How it changed, year by year
Total installed capacity, from 2015 to 2026.
- 2026 16,116MW +25
- 2025 16,091MW +18
- 2024 16,073MW +214
- 2023 15,859MW +16
- 2022 15,843MW 0
- 2021 15,843MW +152
- 2020 15,691MW −376
- 2019 16,067MW +167
- 2018 15,900MW +1,211
- 2017 14,689MW +2,144
- 2016 12,545MW +248
- 2015 12,297MW —
The figures come from the ENTSO-E Transparency Platform: installed generation capacity by production type. The year is the one the operator reports for, not the year the figure was published.
Two things are not here: the number of installations per source, and batteries as a source of their own. The aggregated report does not carry them, and batteries fall under “other”. They appear the day the source publishes them separately.