The Elektrizitätswerk Zürich (EWZ) sees the construction of solar plants in the high alpine regions of Switzerland as a secure mainstay. The utility is planning another solar plant on the dam wall of a hydroelectric power plant high up in the mountains. The company plans to install more than 1,000 solar modules with an output of 350 kilowatts on the 690-metre-long dam wall of Lago di Lei in Graubünden. The system will cover the dam wall over a length of 550 metres and, once completed, will supply around 380 megawatt hours of electricity each year.
This is already the second installation of this kind to be completed by the EWZ. The first is at the dam of Lake Albigna, also in the canton of Graubünden. This plant has been in operation for a year and has fully met the expectations of the EWZ, so that the forecasts for the new plant are also good. As there, the electricity at Lago di Lei, directly on the border with Italy, will also be fed in via the grid connection of the associated hydroelectric plant of the Hinterrhein power station (KHR). “This makes optimal use of the existing infrastructure to make a further contribution to electricity production from solar energy,” emphasises Guido Conrad, director of the CHR.
