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:

  • Centrica invests in Barrow Green Gas

    Centrica plc’s Energy Marketing & Trading business has agreed to acquire a 50% stake in Barrow Green Gas (“BGG”), the UK’s largest biomethane supplier. BGG is the only gas business in Great Britain focused solely on the green gas market, shipping almost half of the green gas used by British homes and businesses. Established in 2012, the company supports biomethane producers by facilitating the supply of biomethane to gas buyers, and provides Green Gas Certificates (GGCs) to energy suppliers...

    Posted: 29 June, 2018

  • UK-produced Green Gas now being used to fuel vehicles

    Renewable Energy Association welcomes growing number of hauliers switching to biomethane fuel UK-produced green gas production forecast to soar to meet rising demand from British transport sector Biomethane 30%-40% cheaper than diesel fuels and has potential to reduce HGV GHG emissions by 70% A growing number of commercial haulage operators are clamouring to improve their environmental credentials by running haulage trucks on green gas.  Whilst some green gas has been imported, domestic producers have so far been limited to supplying the heat market...

    Posted: 14 June, 2018