Created by LT, ZHAW, on 29.10.2024
This floating PV system is anchored to the bottom of the Valais reservoir, Lac des Toules. Designed with individual, interconnected floats, the PV installation rises and falls with the water level. Due to bifacial module technology, the reflection from the water surface and the snow can be optimally utilized for energy production. The demonstration project won the Watt d’Or award in the Renewable Energy category in 2021.
Facts
| Location | Lac des Toules (VS) |
| Altitude | 1810 m.a.s.l. |
| Construction year | 2019 |
| Module type | bifacial |
| Azimuth | 0° S |
| Tilt | 37° (32°)* |
| Module area | 2240 m2 |
| Nominal Power | 448 kWp |
| Energy yield | ~800’000 kWh/a |
| Specific yield | ~1785 kWh/kWp |
| Wind speed | up to 120 km/h |
| Temperature Range | -25°C to 30°C |
*Two tilt angles, as the structure floats from mid-June to mid-December and remains on a platform at the bottom of the reservoir for the other half of the year, which has its own tilt angle
