Emission factors are calculated for each SmartestEnergy product by multiplying the megawatt hours of power generated by each type of generation technology for a 12 month period up to 31st March each year (to align with the Fuel Mix Disclosure reporting year) by a corresponding emission factor for each technology type.
Emission factors for each technology type are taken from Ofgem, using the published values corresponding to the relevant Fuel Mix Disclosure reporting year. The Ofgem emission factors cover carbon dioxide only, and do not include other Kyoto gases such as methane which may be emitted by some forms of electricity generation.
Ofgem allocates a 0 gCO2/kWh emission factor to all electricity generation classed as ‘renewable’, which includes energy from waste and biofuel.
For wholesale electricity purchased by SmartestEnergy, the UK residual mix emission factor for the corresponding Fuel Mix Disclosure reporting year is used.