The Green Gas Certification Scheme

The Green Gas Certification Scheme (GGCS) tracks biomethane, or ‘green gas’, through the supply chain to provide certainty for those that buy it.

Each unit of green gas injected into the grid displaces a unit of conventional gas. So the GGCS tracks each unit of green gas from its injection into the distribution grid, to any trades, to its sale to a consumer, or group of consumers. It tracks the contractual rather than physical flows to ensure there is no double-counting from production to end use.

The GGCS is run by the Renewable Energy Association’s subsidiary, Renewable Energy Assurance Ltd. GGCS participants oversee the way it is run, on a not-for-profit basis.

Benefits of the Green Gas Certification Scheme

The GGCS is a simple and reliable way to eliminate double-counting of registered green gas. It provides certainty for consumers who buy the gas, confidence in the green gas sector and an incentive for gas producers to inject green gas into the grid instead of using it to generate electricity.

Taking part in the Green Gas Certification Scheme

Any-one involved in the green gas supply chain can take part in the Green Gas Certification Scheme. The key participants are green gas producers who register the gas they’ve injected to the grid, and suppliers and other traders who register gas sale contracts they’ve agreed. See The Scheme for more details of the respective roles of participants in the GGCS.

Renewable Gas Guarantees of Origin (RGGOs)

Each kWh of green gas is labeled electronically with a unique identifier known as a Renewable Gas Guarantee of Origin (RGGO). This identifier contains, for each kWh of gas, information about where, when and how it was produced. When consumers buy green gas the RGGO is their guarantee that the gas is authentic and has not been sold to any-one else. The range of RGGOs is listed on the consumer’s certificate and can be validated here.

Latest News:

  • Utility Week Article - The green, green gas of home

    Utility Week - The green, green gas of home Alice Cooke examines the advances being made in the green gas market, and asks green gas suppliers what they have to say about the industry. Click here to see the article Utility Week published about the green gas market...

    Posted: 13 December, 2017

  • Green Gas Certificate demand smashes the 1TWh barrier

    Record use of green gas certificates as 1TWh mark passed 1 TWh of green gas is enough gas to power 83,000 UK homes for a year Suppliers have now sold enough renewable gas through the Green Gas Certification Scheme (GGCS) to cover the annual consumption of 83,000 homes, cook 300 million Sunday roasts, or fry four billion eggs. The scheme is announcing today that sales of its certificates have now hit 1 TWh...

    Posted: 10 November, 2017