Guarantee of Origin (GoO)

A Guarantee of Origin (GoO) is used as proof that power has been generated from renewable sources. One certificate represents the generation of 1 Megawatt hour of electricity.

- Product: Renewable electricity
- Use: Voluntary
- For: energy suppliers, energy end-users
- Countries: Europe, rest of the world
- Labels: OK-Power, TÜV SÜD EE, I-REC, Swiss GoO market, German RECs