Iceland
Landsnet issues Guarantees of Origin in Iceland. Public tariff data is stated per MWh.
Renewable energy certificate guidance
Buy credible clean electricity certificates with fewer unknowns.
Estimate REC volume, compare certificate types, and prepare a buyer-ready request for suppliers, brokers, or sustainability advisors.
- 1 REC
- Usually equals 1 MWh
- Scope 2
- Electricity reporting support
- Global
- REC, GO, I-REC and EAC paths
Certificate estimator
Estimate the annual certificates you may need.
Use annual electricity consumption or monthly bills to size a procurement conversation. Final reporting needs depend on geography, vintage, technology, and claim rules.
Research basis
Nordic certificate numbers used in the estimator.
The Nordic/Scandinavian entries use the Guarantee of Origin baseline: one certificate for one megawatt-hour of electricity. Country details identify the local issuing body or official scheme reference.
Denmark
Danish rules define the standard size of an origin guarantee as 1 MWh. Energinet administers electricity GOs.
Norway
Statnett describes a GO as proving that the corresponding 1 MWh was produced from renewable sources.
Sweden
The Swedish Energy Agency states that producers receive one GO for each produced MWh.
Finland
Fingrid/Finextra states the standard unit of the guarantee of origin is 1 MWh.
Buyer workflow
A practical path from electricity data to supplier conversations.
Size the claim
Collect annual electricity use by facility, meter, or account. Convert kWh to MWh and decide whether the target is partial or 100% renewable coverage.
Match the market
Use RECs in the U.S., Guarantees of Origin in Europe, and other energy attribute certificates where local frameworks apply.
Check credibility
Confirm vintage, geography, technology, tracking registry, retirement process, and whether the certificate supports your intended claim.
Document retirement
Keep retirement statements, invoices, facility information, and claim language together for audit, ESG, or customer requests.
Certificate comparison
Compare the main renewable electricity certificate types.
Most buyer conversations start with the same inputs: electricity volume, market, certificate instrument, technology preference, vintage, and retirement evidence.
| Instrument | Common markets | Typical unit | Best for | Buyer checks |
|---|---|---|---|---|
| REC | United States and some North American programs | 1 MWh | U.S. renewable electricity claims and Scope 2 reporting support | Tracking system, state or grid region, vintage, technology, retirement proof |
| GO | Europe, including Nordic markets | 1 MWh | European renewable electricity disclosure and buyer claims | Issuing country, AIB/EECS transferability, production period, registry, cancellation |
| REGO | United Kingdom | MWh-based | UK renewable electricity evidence and supplier-backed claims | Generation period, fuel mix disclosure, supplier evidence, technology, claim language |
| I-REC | Many countries outside Europe and North America | 1 MWh in common buyer sizing | International renewable electricity claims where I-REC is the accepted instrument | Country eligibility, registry account, beneficiary, device, vintage, redemption evidence |
| TIGR | Select international markets | 1 MWh in common buyer sizing | Markets or counterparties using TIGR as the tracking system | Program acceptance, project data, vintage, ownership chain, retirement evidence |
| Carbon offset | Global voluntary carbon markets | Usually 1 metric ton CO2e | Emissions reductions or removals outside electricity attribute matching | Standard, project type, additionality, permanence, vintage, retirement serials |
Trust checks
What should be checked before buying certificates.
Good certificate procurement is not only about matching MWh. The claim depends on the certificate, registry, timing, retirement, and documentation trail.
Instrument fit
Confirm whether the buyer needs a REC, GO, REGO, I-REC, TIGR or another local EAC for the market where the claim will be made.
Registry and ownership
Check the issuing body, tracking registry, account holder, transfer path, and whether the certificate can be cancelled for the buyer.
Vintage and geography
Match the production period, reporting year, country, grid region and market boundary to the buyer's intended Scope 2 or customer claim.
Technology details
Review source type such as wind, solar, hydro, biomass or mixed fuel, including whether the buyer has a new-build or local preference.
Retirement evidence
Require cancellation or retirement documentation that shows volume, beneficiary, certificate serials where available, date, and claim period.
Claim language
Align public wording with the actual certificate attributes so the buyer avoids overstating physical delivery, emissions impact or local generation.
Terms to compare
Know what you are asking providers to quote.
Certificate names vary by geography, but the buying questions are similar: how much renewable electricity is represented, where and when it was generated, how it is tracked, and who retires it.
REC
Common U.S. certificate for renewable electricity attributes, typically denominated in megawatt-hours.
GO
Guarantee of Origin certificates used in many European electricity disclosure systems.
I-REC / EAC
International certificate frameworks used where local markets and registries differ.
Retirement
The step that removes certificates from circulation so a buyer can make a specific claim.
Frequently asked questions
Search-friendly answers for certificate buyers.
What is a green energy certificate?
A green energy certificate represents the renewable electricity attributes from a qualifying generation source. Depending on the market, buyers may see terms such as REC, GO, I-REC or EAC.
How many RECs do I need?
Start with annual electricity use in megawatt-hours. If your target is 100% renewable coverage, the estimated certificate volume is usually the same number of MWh.
Are RECs the same as carbon offsets?
No. RECs and other EACs are tied to renewable electricity attributes, while carbon offsets usually represent greenhouse gas reductions or removals from separate projects.
What should I ask a supplier?
Ask about certificate type, registry, generation country or grid region, vintage, technology, retirement process, documentation and whether the certificate supports your intended claim.
Contact
Talk through a REC or EAC request.
Use the form to prepare your certificate request. Include the market, annual electricity use, preferred technology, and reporting deadline if you have them.
Region guides
Certificate markets organized by how buyers search.
Start with the regional certificate system, then drill into country pages where local registry details matter.