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Norway has a very large hydropower potential and has developed it to great extend so that today hydropower covers over 99% of the electricity consumption of the country. Since most of the main sites have already been developed, the focus is now on the development of small hydropower plants. NVE (Norwegian Water Resources and Energy Directorate) has assessed the small hydropower potential and found that 18 TWh could be developed for less than 3 NOK/kWh. NVE estimates that 5 TWh out of 18 TWh could be developed within the next 10 years, which would be an increase of 4.5 % from today’s hydropower production. 5 TWh represent 1000 small hydropower plants with an installed capacity of 1 MW and an investment of 10 to 15 billions NOK.
For further information on Norwegian small hydropower potential, please check NVE’s web page (in Norwegian): NVE - vannkraftpotensial
Small hydropower potential in Norway (NVE) | 
