One centralised system
Guarantees of Origin are the established form of green energy certificates (so-called Energy Attribute Certificates – EACs) in Europe, which certify how and where electricity is produced from renewable energy sources. They are therefore also referred to as the ‘birth certificate’ of electricity. Producers of electricity from renewable energy sources can have these Guarantees of Origin issued by independent registration bodies for the amount of electricity they produce and feed into the grid.