Alpine solar project launched over 2000 metres
STRABAG is realising the NalpSolar project in Graubünden for Axpo. An alpine solar plant with a technology centre is being built here next to the Lai da Nalps reservoir above Serdun. The first electricity is expected to flow as early as December 2025.
Axpo, based in Baden, has commissioned STRABAG to realise an alpine solar project next to the Lai da Nalps reservoir above the village of Serdun in Graubünden. Around 1,500 solar panels and a technology centre will be installed in the NalpSolar project at over 2,000 metres above sea level, the Schlieren-based construction company announced in a press release. The first 10 per cent of the plant is due to go into operation this December.
“The construction work is technically demanding, logistically challenging and ecologically sensitive, but above all a milestone for the energy transition in Switzerland,” writes STRABAG. The individual solar tables and other components have to be transported along a narrow, single-lane mountain road. The road, which is normally closed, was built by Axpo in the 1960s as an access road for the reservoir.
As there are no storage facilities on the construction site, only the material that is immediately needed is transported. “The logistics now run like clockwork,” explains construction foreman François Borner in the press release. “Instead of being stressful, it is now easy to plan.” In the press release, STRABAG cites the uneven ground and respect for the nature conservation zones in the construction area as further challenges in the project.
Due to the altitude, NalpSolar will produce a lot of electricity, especially in the winter months, explains STRABAG. The construction company is aiming to complete the work in 2028. The electricity from NalpSolar is reserved for the SBB power grid for the next 20 years.