Understanding Guarantees of Origin in 2026: the mechanism made clear
Defining a Guarantee of Origin: the “certificate” linked to 1 MWh of renewable electricity
A Guarantee of Origin is an electronic certificate attached to 1 MWh of renewable electricity produced and injected into the grid. It contains administrative traceability data (technology, installation, production date). A useful point to remind a skeptical customer. The GO does not “follow” the electron. It documents an accounting balance.
Who issues and who records it: producers, registry, suppliers (simple reference points for answering questions)
The producer requests issuance on a dedicated registry. The registry records the issuance, transfers, and then the cancellation when the supplier uses it to substantiate an offer. Without cancellation, there is no enforceable “green” claim.
Electricity Guarantees of Origin: what the customer pays for and what the supplier actually finances
The customer pays for a kWh. The supplier finances the purchase of electricity and, separately, the purchase of Guarantees of Origin, which it cancels against the volumes sold. This mechanism proves a match over the year. It does not prove direct financing of new assets, unless it is an offer explicitly backed by identified production contracts.
Green electricity traceability: what the GO proves… and what it does not prove
Say it plainly: a GO does not trace the electron consumed at the meter
In your discussions, set the framework. The grid remains an instantaneous mix. A Guarantee of Origin certifies that 1 MWh of renewable electricity was produced and injected into the grid, then recorded and cancelled. No tracing of the electron to the meter.
What traceability does guarantee: accounting equivalence between renewable production and consumption
Traceability is based on accounting. For every MWh sold as “green,” a unique GO must be cancelled. Accounting equivalence can be checked through the registries. Guarantees of Origin prevent double counting and frame the “renewable electricity” claim.
Explain the real impact: contribution to the renewable market, but not “instant local electricity”
The main effect is economic. Purchasing GOs finances part of the value of producers, depending on the offer. Real impact when supply is documented. Long-term contracts, identified producers, label-type requirements. Otherwise, do not promise local supply or real-time matching. To go further on the measurable impact of renewable electricity in regulatory calculations, see the impact on the emission factor.
Electricity GO: recognizing a genuinely production-backed green offer
“Backed” supply: direct contracts with producers, long-term purchase, a more concrete link to production
Guarantees of Origin prove that a volume of renewable electricity has been injected into the grid, but they do not allow you to trace the consumed electron. To speak of “backed” supply, look for a direct contract with a producer (or an appointed aggregator) and a long-term purchase. On the quote or annex, require identification of the production assets and the delivery period, not just the purchase of certificates.
New capacity vs existing assets: how to know whether the offer helps develop new projects
An offer can rely on existing plants without financing new assets. To assess “additionality,” ask whether part of the volumes is covered by long-term PPAs, whether the producer is under construction, and whether the supplier publishes an annual reporting of volumes. Failing that, you are mostly selling a documentary offsetting approach.
Simple criteria to ask the supplier for: origin (France/Europe), type of installation, age, volume transparency
Ask three simple questions. Geographical origin of the GOs (France or Europe) and country of issuance. Type of installations (hydro, wind, PV, biomass) and commissioning year. Finally, transparency: volumes purchased, volumes allocated, allocation method by site. With these elements, you can answer the customer confidently, backed by figures.
Responding to a skeptical customer: useful phrases and examples that make sense
Reframe the objection without putting yourself at fault: “you’re right about physical traceability”
You can answer simply. You’re right: you do not track the electron across the grid. The promise of an offer with Guarantees of Origin is accounting and documentary traceability, not the physical separation of flows. Your role is to frame the scope, what is proven, and what is not.
Use a clear comparison: “like a receipt” or “a production ticket” to explain the GO
Explain that a GO works like a receipt. For every 1 MWh produced from a renewable source, a certificate is issued. When it is allocated to a customer, it is cancelled. The customer is not buying “that electron”; they are buying proof that an equivalent quantity was produced.
Offer the customer a decision grid: GO-only offer, backed offer, or a mix depending on budget and objectives
Set out a clear grid, without making accusations. The goal is to align the sales pitch with the level of ambition. To go further on how to respond to objections in meetings, rely on a structured sales argument framework.
- GO-only offer. Administrative proof, contained cost, ideal for a basic approach.
- Backed offer. Identified producer, contract or dedicated allocation, clearer impact.
- Mix. GO foundation, backed supplement on a defined share, to stay within budget.
Avoiding the trap of a dispute: staying factual, educational, and cautious
What you can say without accusing: rely on definitions and the notion of accounting equivalence
Stay with the facts. A so-called “green” offer is most often based on Guarantees of Origin attached to a kWh volume. They prove that renewable production was injected into the grid and that an equivalent volume is “allocated” via a certificate. This is accounting equivalence, not physical traceability electron by electron.
Avoid risky wording: no “fake green offer”, prefer “different level of commitment”
Avoid words that accuse or suggest deception. Prefer neutral comparisons. Between two offers, people often speak of a different level of commitment. Some are limited to cancelling certificates. Others add a contractual link to production assets, or explicit financing of new capacity.
Good practices for your quotes and discussions: clear wording, measurable promises, documents to keep
In your quotes and meeting notes, keep to a simple line. Describe what is provided and what can be verified. Promise only measurable elements. To frame your written materials, you can also rely on best practices and prepare a compliant quote.
- State the scope. Volume in kWh, period, and certificate cancellation method.
- Qualify the stated origin. France, Europe, or a mix, depending on the supporting documents provided.
- Keep the T&Cs, offer sheets, cancellation certificates, invoices, and dated exchanges.
