Ever wanted to run your
Â electricÂ carÂ for free? If you're open to a bit of give and take, then stay plugged in and your wishes might come true. At least that's what some Â EuropeanÂ powerÂ companies and Japanese Â carmakers believe.
E.ON and EDF are already working with Nissan to develop services that allow
Â powerÂ stored in Â electricÂ vehicle Â batteriesÂ to be sold back to the grid - and now they're trying to persuadeÂ EuropeanÂ carmakers to follow suit.
With millions of
Â electricÂ cars expected on Â EuropeanÂ roads over the next decade, utility Â firmsÂ see both an opportunity to sell drivers more Â electricity and a risk that surges in charging at peak times could destabilise stressed Â powerÂ grids.
That's why E.ON is working with Nissan to develop so-called vehicle-to-grid (V2G) services, including software for aggregating and marketing charging data so the German
Â powerÂ company can predict peaks and troughs in Â electricity demand.
Nissan's idea is that if you charge your
Â electricÂ vehicle (EV) at off-peak times and are prepared to sell Â powerÂ back to the grid when it's under strain, you could effectively charge for free.
French utility EDF has teamed up with San Diego-based V2G technology specialist Nuvve to build the first commercial-scale V2G charging network in Europe for vehicles made by Japan's Nissan and Mitsubishi.
Europe's biggest utility by market value, Italy's Enel, has also worked with Nissan and Nuvve on V2G pilots in Denmark and the Netherlands, as well as in Rome and Genoa.
The problem for the utilities is that unlike Nissan, the French and German
Â firmsÂ that will make most of the Â electricÂ cars expected on Europe's road in coming years are not playing ball - at least for now. Virtual Power Plant
E.ON and EDF are talking to
Â EuropeanÂ carmakers about taking V2G seriously, according to two industry sources, but they are more focused on EV charging technology that the sources say is less suited to two-way flows than Japanese standards.
IONITY, a joint venture of Volkswagen, D
aimler, BMW and Ford, said it did not see an initial case for V2G in its drive to install high-speed charging stations across Europe to facilitate long-distance journeys.
"Our clients want to charge fast and not feed back in," a spokesman for IONITY said. "Only in combination with an external storage system would a use case possibly be interesting."
The other big V2G holdout is EV pioneer Tesla, which also sells large stationary
Â batteriesÂ for home Â powerÂ storage. Tesla declined to comment on V2G.
The idea of using millions of EV
Â batteriesÂ as large virtual Â powerÂ plants to put Â powerÂ back into the grid has been around for years though the concept is still mostly at the pilot phase, mainly because there are very few EVs on the roads now.
But its appeal to the
Â powerÂ industry is obvious.
With a typical
Â carÂ driving less than 10 percent of the day, the rest of the time Â carÂ batteriesÂ could be used to balance out demand and supply swings in energy networks that increasingly need to juggle intermittent solar and wind Â power.
That's the case in Germany in particular as it is phasing out baseload nuclear and coal-fired plants, unlike France and Japan which are sticking with nuclear to ensure a secure supply.
Jonathan Tudor, director of technology strategy at the innovation division of Britain's biggest utility, Centrica, said V2G will be part of the mix of technologies stabilising networks - once more EVs hit the road.
"Winding the clock forward 10-12 years, if consumer behaviour stays the same we will see thousands of people arriving home and wanting to charge up their
Â cars at the time that is already peak demand for most countries," he said.
Alberto Piglia, global head of e-mobility at Enel, said as the EV market grows exponentially, there will be a tipping point at which there will be an explosion of related energy services. "We are preparing the world for this."
One major hurdle for the roll-out of V2G in Europe is that for now it only works well with the EV charging standard developed in Japan known as CHAdeMO.
The IONITY e-mobility joint venture, meanwhile, is focused on establishing the Combined Charging System (CCS) plug as the industry standard.
But experts say the communication protocol between CCS chargers and EV
Â batteriesÂ is not being set up currently in way that allows rapid changes in two-way information flows to charge and discharge Â electricity.
Rather, CCS is being developed so EV owners can charge vehicles as fast as possible, to encourage the acceptance of
Â electricÂ cars by drivers reluctant to give up the convenience of quickly filling up vehicles with gas.
"We are missing a V2G charging standard," said Gregory Poilasne, chief executive of Nuvve.
The network of 4,000 V2G charging stations it is developing with EDF in Britain and France will only be used for now with corporate fleets of Nissan Leaf E-NV200 utility vans and Mitsubishi Outlanders running on the CHAdeMO standard.
That's why Nuvve is also in talks with French and other
Â carmakers about making CCS compatible with V2G.
China, the world's biggest market for EVs, also has V2G in mind. China's own GB/T standard is not well suited to V2G but the China
Â Electricity Council struck an agreement with the Japan's CHAdeMo Association last year to develop a common fast-charging plug that should handle rapid two-way flows.
But at a time when global infrastructure standards for EVs have yet to be established, German
Â carmakers are reluctant to give up on the technology they have invested in, nor cede too much control over their vehicle components to utility Â firmsÂ - something V2G effectively requires them to do. Game Changer?
Still, despite making little headway so far, E.ON hopes that the CCS standard will become part of the V2G mix.
"The technology for aggregation and marketing that we're developing at E.ON based on the CHAdeMO standard will also be applicable to the CCS standard," said Johannes Werhahn, E.ON's head of flexibility, renewables marketing and storage solutions.
OVO Energy, a challenger to Britain's "Big Six"
Â powerÂ retailers, is also eyeing CCS as a market for the V2G charger it launched last year in a deal with Nissan.
"We are very close partners with Nissan but we do expect to work with other
Â carÂ manufacturers in future, including those that use CCS," said Tom Pakenham, OVO's head of EVs.
Centrica invested in Israeli EV software charging firm Driivz last year and said part of the deal would involve developing V2G technology.
"Once the software is integrated and we understand what needs to be done we will look to start trials, likely sometime in the next 18 months," Tudor said.
One catch for V2G proponents is that constantly charging and discharging is widely perceived to be the fastest way to shorten the life span of a battery - the most expensive component in an EV usually accounting for about a third of its cost.
Analysts say persuading consumers that V2G makes economic sense and doesn't disrupt their daily lives will be crucial.
Nissan, though, is convinced V2G will "change the rules of the game" once consumers can be offered a service that will effectively mean they can charge vehicles for free.
Japan's Honda also plans to incorporate V2G capability when it launches its first EV in Europe this year.Nuvve's Poilasne said V2G could reduce the total cost of EV ownership by about 25 percent without ruining the battery, though earnings from grid-balancing services would be greater in countries with a larger share of intermittent renewable energy.