Guarantee of Origin

Electricity may only be marketed as "electricity produced from renewable sources" when it has been issued guarantee of origin. In Finland, guarantees of origin are issued by the transmission system operator Fingrid. Renewable energy sources:  

  • Wind power 
  • Solar power 
  • Air source heat energy 
  • Geothermal and hydrothermal energy 
  • Ocean energy 
  • Hydropower 
  • Biomass 
  • Landfill gas, sewage treatment plant gas and bio gas