Download center Contact us Global site About aluminium Products Our future Careers Investor relations Press room About Hydro Home Products Energy Our power plants Our power plants Sogn Røldal-Suldal Telemark Vennesla 109 employees 20 power plants 10 TWh per year Hydro is Norway's second largest producer of hydroelectric power. Our production of hydropower is concentrated in four main regions in Norway: Telemark, Røldal-Suldal, Sogn and Vennesla. Our power plants together produce approximately 10 terawatt hours (TWh) of electricity per year. By comparison, this is roughly the same as the entire city of Oslo uses in the same period. It is also enough energy to produce 800 000 tonnes of aluminium. The power plants in Telemark were built in the first half of the last century, when Hydro's industrial activity was concentrated in Notodden, Rjukan and Porsgrunn. The six power plants in Telemark produce about 3.5 TWh a year. This is roughly equivalent to the electricity consumption of 220 000 Norwegian households. Hydro also owns 33% of the Skafså power station with its annual production of 287 GWh. The power plants in Røldal-Suldal were built in the 1960s and provided energy to Hydro's first aluminium plant in Karmøy. The eight power plants in Røldal-Suldal produce about 2.8 TWh. This is roughly equivalent to the electricity consumption of 175 000 Norwegian households. The power plants in Sogn were part of the merger of Årdal Sunndal Works and Hydro's aluminium business in 1986. Tyin is located here, our largest hydropower plant which was upgraded in 2003-2004. The four power plants in Sogn produce about 3.1 TWh. This is roughly equivalent to the electricity consumption of 194 000 Norwegian households. Hydro took over the power plant in Vennesla with the acquisition of Vigeland Brug in 2013. © 2016 Norsk Hydro ASA Contact us Privacy Legal Notice: Terms and Conditions Accessibility statement Glossary Sitemap Mobile site Go to customer portal