Guarantees of Origin

A Guarantee of Origin (GO) certifies that one megawatt-hour of electricity was produced from renewable sources.

As a core element of European energy markets, GOs enable suppliers and businesses to demonstrate renewable electricity sourcing with confidence and transparency.

Transparent certification

We provide fully verifiable GOs, tracked in national registries, ensuring traceable, credible renewable energy claims and EU-compliant documentation.

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Competitive pricing

By sourcing directly from exchanges, traders, and renewable energy producers across Europe, we offer competitive prices and a reliable supply.

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Tailored solutions

Whether for spot purchases or long-term procurement, we design strategies to meet your organisation’s sustainability goals and reporting requirements.

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GO: Key to Energy Transparency

Guarantees of Origin (GOs) provide clear, verifiable information about where, when, and how renewable electricity is generated. This standardised system allows businesses and consumers to confidently support renewable energy while ensuring supplier claims are accurate, credible and fully EU-compliant.

Why GOs matter

  • Traceable renewable generation – fully audited and registry tracked

  • Detailed provenance data – includes location, vintage and technology type

  • Supports sustainability reporting – helps with Scope 2 emissions and credible environmental claims

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  • Access to GOs via exchange and over-the-counter markets

  • Full, audit-ready documentation and registry compliance

  • Advice on sourcing strategies and long-term procurement

  • Guidance on integrating GOs into sustainability and reporting frameworks

How we Help You:

Guarantees of Origin Made Simple

We source GOs directly from the exchange, traders, and renewable energy producers across Europe, ensuring competitive prices and reliable supply. Whether you require spot purchases or long-term procurement strategies, we tailor solutions to match your goals.

Source your GOs in three easy steps

  • Step 1

    Request Guarantees of Origin

    Share your energy certificate needs and we’ll prepare a proposal with suitable GOs.

  • Step 2

    Source selection

    Choose from a range of certified renewable sources, carefully researched and assessed by our team.

  • Step 3

    Purchase & certification

    We handle the entire process, from sourcing GOs to registering them on your behalf, ensuring full transparency.

Get in touch

Take the Next Step

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Contact Grey Epoch today to learn more about our services and how we can help you navigate the Guarantees of Origin market.

Speak with an expert

  • 1bn

    carbon products traded annually

  • 18yrs

    active in carbon markets

 FAQs

 

  • A GO certifies the production of one megawatt-hour (MWh) of renewable electricity, providing consumers and businesses with confidence in their renewable electricity claims.

  • Each GO includes detailed metadata such as generation technology, location, and vintage. With tracking through official registries, double-counting can be prevented.

  • They are essential for accurate Scope 2 emissions reporting, allowing organisations to claim renewable electricity consumption reliably.

  • Yes, GOs are tradable across interconnected European registries.