456 solar installations with 23.1 MWp of capacity are installed in Willisau.
Go to the communityRoof potential
The suitable roofs of Willisau could deliver around 105 GWh of solar power a year. An estimated ~22% of it is used today.
A local electricity community is collecting sign-ups here. The more neighbours join, the sooner it starts.
Willisau, LU
Menznau, LU
Alberswil, LU
Grosswangen, LU
Get solar power from your neighbourhood. Joining is free and you keep your electricity supplier.
Sources: Swiss Federal Office of Energy (SFOE), swisstopo, opendata.swiss. As of October 2026. Totals per municipality only, no individual installations.
| Build year | Installations | Capacity (kWp) |
|---|---|---|
| before 2012 | 8 | 83 |
| 2012 | 6 | 162 |
| 2013 | 15 | 636 |
| 2014 | 28 | 1’357 |
| 2015 | 28 | 794 |
| 2016 | 10 | 112 |
| 2017 | 10 | 234 |
| 2018 | 16 | 736 |
| 2019 | 24 | 917 |
| 2020 | 28 | 1’501 |
| 2021 | 35 | 4’327 |
| 2022 | 42 | 1’283 |
| 2023 | 96 | 5’293 |
| 2024 | 67 | 3’661 |
| 2025 | 36 | 1’684 |
| 2026 | 7 | 277 |
23 MWp have been added since 2012.
| Month | GWh |
|---|---|
| Jan | 2.8 |
| Feb | 4.6 |
| Mar | 8.5 |
| Apr | 11.6 |
| May | 13.3 |
| Jun | 14.5 |
| Jul | 15.1 |
| Aug | 13.3 |
| Sept | 9.6 |
| Oct | 6 |
| Nov | 3.1 |
| Dec | 2.4 |
