According to the provisional figures of the SFOE for 2025, Swiss electricity production continues to rely primarily on hydropower (55.3%) and nuclear power (27.2%). Photovoltaics contributed around 8.1 terawatt-hours in 2025 – almost 12% of total domestic electricity production, significantly more than just a few years earlier. (As of: figures for 2025, published in February 2026)
Key points in brief
- The basis is the official «Swiss Electricity Statistics» of the SFOE.
- In 2025, 55.3% of domestic electricity production came from hydropower, 27.2% from nuclear power and 17.5% from «Renewable and Thermal».
- Total domestic production fell by 16.5% in 2025 compared to the record year of 2024, mainly due to lower hydropower production.
- The figures shown here are provisional; the final version will be published later in the year.
What is the composition of the Swiss electricity mix?
| Energy source | Share 2025 | Quantity |
|---|---|---|
| Hydropower (total) | 55,3 % | 37.5 TWh |
| Nuclear power | 27,2 % | 18.4 TWh |
| Renewables & Thermal (total) | 17,5 % | 11.8 TWh |
| of which photovoltaics (incl. self-consumption) | around 12% of total production | 8.1 TWh |
Source: SFOE, Swiss electricity balance 2025 (provisional figures, published February 2026). Total domestic production 2025: 67.7 TWh (−16.5% compared to 2024). Total consumption 2025: 58.1 TWh (+1.1%).
How strongly has the photovoltaic share grown recently?
With 8.1 TWh in 2025, photovoltaics is now the largest single item within the «Renewables and Thermal» category and mathematically covers around 12% of total domestic electricity production. By comparison, according to Swissolar, installed PV capacity reached around 9.5 gigawatts by the end of 2025. The separate analysis of Switzerland's solar potential shows how fast this expansion is progressing and where Switzerland stands in relation to its technical solar potential.
In consultations, we are often asked how much the own solar system actually contributes «to the energy transition». The official electricity balance shows: Photovoltaics has grown from a niche technology to the largest single item within renewable and thermal electricity production.
Frequently asked questions
What percentage of Swiss electricity comes from photovoltaics?
According to the provisional SFOE figures for 2025, around 12% of total domestic production (8.1 of 67.7 TWh).
Why did total electricity production fall in 2025?
Mainly due to significantly lower hydropower production (−22.5% compared to 2024), while renewable and thermal production grew by 21.8% in the same period.
Are these figures officially confirmed?
These are provisional figures from the SFOE, published in February 2026. The definitive version will appear later in the year.
Where can I find the original federal publication?
On the website of the Swiss Federal Office of Energy under the heading Electricity Statistics and in the federal publication database.
How much could your roof contribute to this growth?
We check without obligation how much solar power your roof could produce.
Sources: Swiss Federal Office of Energy (SFOE), Swiss Electricity Statistics / Electricity Balance 2025 (provisional); Swissolar.
Last updated: 18 September 2026 · Contact for questions on methodology: ecoEn editorial team
