Electric vehicles can be charged overnight and at off-peak times, so it's reasonable to assume they use a higher-than-average share of low-carbon energy.

For example, around 50% of the UK's electricity production is from low-carbon sources (renewables and nuclear). But a much higher percentage of off-peak power is low-carbon. After midnight, close to 100% of the grid is low-carbon because the gas turbines spin down while the wind turbines and nuclear reactors keep running. EVs and smart chargers/smart grids will help us make better use of clean off-peak power!

Also, grids will continue to get cleaner over time. An EV purchased today will have lower and lower emissions as it ages, but a combustion vehicle will only get worse!