CMO.grexel selected as the Danish Biogas Registry, the certificate scheme operator, has decided to adopt Grexel's solution for certificate management.

European Residual Mix Calculation

Grexel is responsible for calculating the European Residual Mixes and the European Attribute Mix on behalf of the Association of Issuing Bodies (AIB).  

Why is this so crucial for reliable Electricity Disclosure and Guarantees of Origin?

GECCO™ - Your Platform for Efficient Carbon Credit Management

Deposit and manage credits from EU ETS

Case: Ireland - In Need of an Efficient Online Registry for GOs

Ireland is a good example of how CMO.grexel online registry helps issuing bodies and local energy authorities to manage their energy certificates with efficiency, transparency and, let’s not forget, low cost.

Grexel discloses and compensates its Carbon Footprint

Being an environmentally aware company, Grexel® has decided to disclose and compensate its own carbon footprint.

Norwegian Central Registry, NECS

The Grexel-built Norwegian Energy Certificate System, NECS, is the first certificate registry supporting internationally connected disclosure and support certificate schemes.

Energy Certification in Egypt - Thriving in Turmoil

To support the rising trend of renewable energy projects in Egypt, the consumer protection regulatory agency, ERA, seeked Grexel's assistance in designing a guarantee of origin system compatible with the European markets.



Our Services

Regulatory and Market Engineering Services
How can we optimize the effectiveness of support schemes and empower consumers to be the driving factor behind green economy?
Read more »
Energy Certificates for Beginners »

Central Registry Systems Services
Need a central registry system to set up a trading scheme for environmental commodities or rights, such as Guarantees of Origin? See what the market leader has to offer.
Read More »


Our Clients

We host a central registry (CMO.grexel) for Guarantees of Origin for Croatia, Denmark, Hungary, Iceland, Ireland, Luxembourg, Serbia and Sweden.

We power a central registry for support certificates for Norway (NECS) and Sweden (Cesar).
It is the world’s first certificate-based joint support scheme between two countries!

We also provide a central registry (GGT) for the Biomethane Certification Scheme in the UK

More »


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CMO.grexel selected as the Danish Biogas Registry, the certificate scheme operator, has decided to adopt Grexel's solution for certificate management.
Read More»

Grexel cuts emissions by 36% in 2015
In 2015, business done by Grexel induced 19,75 tonnes of CO₂, a significant decrease when compared to previous years.
Read More»

Grexel will supply Serbian GO registry
We are pleased to announce that the Transmission System and Market Operator of Serbia, Elektromreža Srbije (EMS), has selected us as their registry provider for Guarantees of Origin.
Read More»

Scientific Contributions

Grexel is active in the energy certification field. We are involved in its development, also from a non-business perspective.
Read More»

Market Data

  2016 2015
Norway 111 877 166 134 685 137
Croatia 74 639 68 378
Denmark 12 541 293 17 794 672
Finland - Grexel
Germany - Öko
Iceland 6 675 406 6 448 067
Ireland 1 727 763 1 975 400
Luxembourg 129 033 134 463
Sweden 21 704 352 28 901 715

More Statistics

CMO.grexel reports
EECS Market data from Denmark, Finland, Germany, Iceland, Luxembourg and Sweden

NECS GO reports
EECS market data from Norway

Cesar GO reports
Swedish national GO market reports

NECS Elcertificate reports
Norwegian support certificate market reports

Cesar Elcertificate reports
Swedish support certificate market reports

AIB Statistics
EECS certificate market information

Grexel® is a registered EU trade mark

Partners & Industry Recognition



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