Renewable Gas Guarantees of Origin (RGGOs)
The GGCS IS system labels each registered kWh of green gas electronically with a unique identifier known as a Renewable Gas Guarantee of Origin (RGGO), rounded to the nearest kWh. This identifier contains, for each kWh of green gas, information in code form about:
- the technology and feedstock from which it was produced (for example, biogas from AD, landfill gas or syngas from gasification)
- the month and year in which it was produced (MM/YY)
- the part of the UK in which it was produced (England, Wales, Scotland, N. Ireland)
- the registered producer
- the kWh number, part of a sequence or range relating to that producer’s green gas injected into the grid that month.