Hydro power plants

Nearly all electrical energy is produced by renewable energy resources, hydro (75,5%) or geothermal (24,5%).  Only on the islands of Grimsey and Flatey, which are not connected to the national grid, are diesel generators used to produce electricity, apart from minor production by diesel emergency generators.

All power stations larger than 1 MW must be connected to the national grid, but many owners of smaller stations feed electricity into the grid for sale.

The National Power Company (Landsvirkjun) is the largest producer of electricity, whose production amounts to 12469 GWh or 75% of the total, followed by Reykjavik Energy, whose production is 2138 GWh or 12% of the total. The third company, HS Orka, produces 1431 GWh, corresponding to 9% of the total national production.