For the first time since the Industrial Revolution, Britain is obtaining more power from zero-carbon sources than fossil fuels. Click here to read the full story.
The milestone has been passed for the first five months of 2019.
National Grid says clean energy has nudged ahead with 48% of generation, against 47% for coal and gas.
The rest is biomass burning. The transformation reflects the precipitous decline of coal energy, and a boom from wind and solar.
John Pettigrew, CEO of National Grid, said that some of the renewable energy generated when the wind is blowing or the Sun is shining will be stored in the batteries of people's electric cars for use later.
The cars' charging systems will be reversed so their batteries can feed electricity back to the grid when demand peaks – like when people are cooking supper.
"One of key attributes of electric vehicles is they have a battery and therefore they can be used as a source of energy on to the network," he said.
"We could aggregate all the cars and use that electricity to support the grid when it’s needed. It's going to be a really effective tool for us to keep costs down."
The firm estimates this vehicle-to-grid technology (V2G) could solve 10-15% of the UK's demand for storage.
But it's hard to be confident about projections because autonomous vehicles may disrupt patterns of car usage and ownership.
For more information about how Green Motion in the UK and worldwide promotes the use of electric, hybrid and low emission vehicles visit www.greenmotion.com