The surge in plug-in motors popularity could cause “challenges” for energy providers, according to National Grid forecasts.
By 2050, 90 per cent of new cars are expected to be electric sending demand for electricity soaring, especially at peak times.
And the National Grid said peak time demand could rise by 18 gigawatts (GW) – the equivalent of nearly six Hinkley Point nuclear power stations.
It said “smart chargers” could have to be introduced to only fill up car batteries when power networks could cope.
Drivers would have to wait until times of day when there was surplus electricity.
And cars with existing charge left could be used to plough resources back into the grid.
Dustin Benton, acting policy director at the Green Alliance, a think-tank, told the FT to keep costs down consumers may have to “accept some control over when and how they charge their cars”.