See: http://www.energy.eu/http://www.nordicenergysolutions.org Orkustofnun (2010). Energy Statistics in Iceland 2009. Primary energy refers to energy found in nature that has not been subjected to any conversion or transformation process, e.g. coal, lignite, mineral oil, natural gas, uranium (nuclear energy), water (hydropower), solar radiation, wind. Final energy is a form of energy available to the user following the conversion from primary energy.