How V2G could stabilise the grid

Ernesto Ciorra is one of the speakers at the Energy Storage World Forum in Berlin from May 8 to 12.

Ernesto Ciorra is one of the speakers at the Energy Storage World Forum in Berlin from May 8 to 12.

By Jason Deign

Vehicle-to-grid (V2G) storage may be all that grids need for stability as renewables increase, according to a speaker at the upcoming Energy Storage World Forum, on May 8 to 12.

“With V2G technology we can provide grid stabilisation services without any need for additional storage reserves, but by simply aggregating electric vehicle batteries,” said Ernesto Ciorra, Enel’s head of innovation and sustainability.

“With the current technology that we are already improving, for a country like Denmark to provide stabilisation services we need about 40 electric vehicles, while in Germany and UK the minimum number is about 100.”

Ciorra told Energy Storage Report that if all the 18,000 Nissan electric vehicles in the UK were connected to the electricity network, they would generate an output equivalent to that of a 180MW power plant.

“If that were to be scaled up in a future where all vehicles on UK roads were electric, V2G technology could generate a virtual power plant of up to 370GW,” he said. 
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Vehicle-to-grid adds mileage to energy storage

Nissan Leaf electric vehicles in a vehicle-to-grid energy storage trial.

Nissan Leaf electric vehicles in a vehicle-to-grid energy storage trial. Photo credit: Nissan Motor Co.

Why do we write about electric vehicles in Energy Storage Report? The obvious answer is plug-in electric vehicles (PEVs) and hybrids need batteries, and batteries are a hugely important part of the energy storage pantheon.

Currently dominated by lithium-ion (Li-ion) technology, the same type of rechargeable battery that powers the laptop I’m writing this on, they are the Achilles heel of the PEV industry, adding at least USD$3,000 to the price of a vehicle. Li-ion vehicle batteries usually take hours to charge, allowing average vehicles to travel just 200 miles between top-ups.
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