Why V2G is the future of energy storage

One of the next major trends in energy storage will be vehicle-to-grid, or V2G, storage. This form of ‘storage on wheels’ is set to be almost as big a contributor to global capacity as dedicated lithium-ion batteries and pumped hydro – the dominant forms of storage currently – within the next 20 years.Get more news about Battery Energy Storage,you can vist our website!

Simply put, V2G charging enables energy to flow bi-directionally - from the grid into an electric car and back again. It’s a system that allows electric vehicle (EV) owners to make money by selling energy from their vehicle back to the grid.

And V2G will soon take-off. In one of the most recent developments, Nottingham City Council announced last week that it had launched a V2G demonstrator project. The council’s fleet depot is home to 40 vehicle-to-grid (V2G) bi-directional chargers with three solar arrays and two 300kW E-STOR energy storage systems from Connected Energy. The council has said the V2G project will enable it to avoid high electricity tariffs and give it the opportunity to sell electricity back to the grid.

How V2G earns money for EV owners
V2G technology can also be lucrative for private EV owners. A V2G trial programme run in the UK – by OVO Energy, Kaluza, Nissan Motor Company, research consultancy Cenex, and Indra Renewable Technology – involved V2G connected car-owners selling energy from their vehicle back to the grid at a rate of 30p per kWh. The programme concluded that “customers in the trial have been able to earn as much as £725 a year without needing to do anything except keep their cars plugged in when they are not in use”.

It's not hard to see why V2G is set to become one of the major sources of global energy storage capacity. Unlike stationary energy storage systems, which can require significant investment, plots of land, and planning permission, electric vehicle sales are continuously increasing with the result V2G can become a much bigger contributor of storage capacity with “no extra cost”, according to Finland-headquartered electric vehicle charging services company Virta.

It’s a compelling argument. It is estimated that globally there will be 140-240 million electric vehicles by 2030. “This means that we'll have at least 140 million tiny energy storages on wheels with an aggregated storage capacity of 7 TWh,” claims Virta. “We believe that electric cars are simply the smartest way to help with renewable energy management and production, as EVs will be part of our lives in the future — regardless of the ways we choose to use them.”

As one participant in the OVO Energy V2G trial commented: “Ninety per cent of the time my car is sat doing nothing. You have a huge energy storage device sitting on your drive. You’ve invested all that money in a car, so why not use it more of the time, rather than have it sitting doing nothing.”
Where major carmakers stand on V2G
While V2G implementation will take off, it will only do so once a number of barriers have been surmounted. To begin with, not all electric cars are V2G compatible, with a number of manufacturers at different stages in the development of the technology. Here’s a run-down of the current position of a number of major carmakers in relation to V2G:

Nissan‍

Though the Nissan Leaf has been V2G compatible since 2013, it was only in September last year that the carmaker approved its first V2G charger for the car.

Volkswagen

In September last year, it emerged that Volkswagen had signed a memorandum of understanding with Ellia Group to explore how V2G technology can potentially stabilise the energy grid, while at the same time rewarding EV drivers.

Ford

US-based Duke Energy announced in August last year that it was beginning a research and development pilot programme to evaluate the possibility of using the Ford F-150 Lightning vehicle – which has V2G capabilities – to feed the power grid.

Hyundai

In April last year, Hyundai – in partnership with mobility provider We Drive Solar – launched a project in the Dutch city of Utrecht, which will involve the deployment of 25 of its IONIQ 5 cars equipped with V2G technology. Hyundai said in a statement that Utrecht was the “first city in the world to deploy V2G technology on such a large scale”.

Porsche

‍In April last year, Porsche issued a statement saying that, as part of a wider pool of vehicles, electric cars could “effectively act as a power plant and help supply what is known as balancing power – electrical power that balances out fluctuations in the power grid”. The statement added that a pilot test conducted by Porsche, the grid operator TransnetBW and consulting firm Intelligent Energy System Services (IE2S), had demonstrated that “electrical balancing power can be stored in the high-voltage batteries of an intelligent swarm of electric cars”. As part of the test, a total of five series-production Taycan vehicles were connected to the power grid via the Porsche Home Energy Manager (HEM) both in a domestic environment and under laboratory conditions.