How to Compare CO2 Emissions

As a Battery Electric Vehicle produces no tail pipe emissions its Vehicle Label will indicate that it has 0 gCO₂/km or it may be listed as N/A not applicable. This would give an indication of the “Direct” CO₂ emission for the vehicle itself.  Click here for a discussion of the “Indirect Fuel Cycle Emission and a method of calculating the Indirect CO₂ emissions from the electricity supplied for the vehicle.

In the case of a PHEV, the emissions quoted will refer to the tail pipe emissions associated with combustion of fossil fuels.  In this case, CO₂ emissions in the range of 60 g/km may be achievable for a PHEV. When this vehicle is operating in all electric mode with the combustion engine switched off, the direct tail pipe emissions will be 0. In the case of the electricity supplied to the vehicle, as for the BEV the Indirect CO₂ emissions may be calculated according from the CO₂ intensity of the electricity supplied to the network.  Click here for how this element of emissions may be calculated.