What are Guarantees of Origin? (GoO)

According to article 15 of European Directive 2009/28/EC, a Guarantee of Origin (GO or GoO) is a type of energy certificate which is Europe's primary and only electricity tracking tool, empowering consumers to actively pick sustainable power generation over fossil-fuel based power generation.

A GO indicates the generation of one megawatt hour (MWh) of electricity from an eligible source of renewable power such as wind, hydropower, solar PV, geothermal and biomass sources. They include information about the energy’s origin, dates of production, identity, location, type, and capacity of the production facility, whether the GO relates to electricity, heating, or cooling, whether and to what extent the installation has benefited from support, when the installation became operational, the date and country of issue, and a special identification number.

Each Member State is obligated to take the necessary action to promote increased production of energy from renewable sources, expressed as a proportion of total consumption.


The main objective of the GO system is to provide disclosure and transparency in the electricity market. Since the energy market is deregulated in Europe, energy produced in one EU country can be delivered and consumed in another. The long term goal of such a market-based system is to increase the financial viability of renewable energy projects and stimulate investments in the renewable sector, thereby pushing out lower-priced fossil fuels over time


Guarantees of Origin are tradable on trading platforms where companies willing to reduce their carbon footprint can acquire them.