V2X is coming to Volkswagen electric cars

Originally promoted by the Japanese government to have emergency power units available in the event of a natural disaster, V2G is increasingly being taken seriously by manufacturers. That is, Volkswagen, which is involved in a project in Sweden and makes the architecture compatible with some of its electric cars.

V2X and variations

A quick reminder for readers who are not already familiar V2X technologyor Vehicle-to-Everything. Translate in a developed and interpreted way: ” From the vehicle to powering many electrical systems “. It is about the possibility of using the energy contained in the batteries of electric cars for various needs.

For example, in the V2G version, or Vehicle-to-Grid, it is to provide it to the national grid in order to smoothly take power during peak periods without the need to restart potentially emitting power plants. CO2 depending on the energy that drives them. This is a service that can be paid for, for the benefit of electric motorists whose electric cars are not running at the time and who have signed up to the system.

At the scale of a house or building, we talk about V2H (Vehicle-to-Home) and V2B (Vehicle-to-Building). Here, the focus is more on finding cheaper energy, by recharging the batteries during off-peak hours, so that part of the energy is taken during peak hours to power one or more households or even offices.

These architectures are also ideal for coupling with intermittent generation of renewable energy sources such as solar and wind.

Volkswagen already 10 years ago

More than a decade after Japanese electric and plug-in hybrid vehicle manufacturers such as Mitsubishi and Nissan pioneered the field, their competitors are beginning to take V2X seriously.

They have an excuse. For a long time, this type of architecture required CHAdeMO as the vehicle charging standard. In recent years, CCS2 used by almost all brands sold in Europe has also become compatible.

However, this is not what Volkswagen and its management expected in 2013 the V2G experiment with the German government and green energy provider Lichtblick. Twenty Volkswagens e-Up! was mobilized for the occasion. For this to work, vehicles must be equipped with two-way charging. At that time, an adaptation was made on the subject.

Germany hoped to have a fleet of electric cars in excess of one million by 2020, and Germany already envisioned being able to count on part of the 7 GWh on board to stabilize its electricity grid. We are still a long way from such a scenario, even though the number of vehicles has already crossed this symbolic threshold.

EV VW 77 kWh

This two-way charging necessary for V2X architectures has just been unlocked by Volkswagen. And this from version 3.5 of the system of electric cars of the ID family, which are equipped with a battery with a usable energy capacity of 77 kWh. Either for newly delivered copies or already in circulation. V2H functionality has also been added.

We are actively shaping the energy transition with products and services focused on electric cars: with bi-directional charging now available, we have tailored the new service offering to our customers’ needs. “, said Imelda Labbé, member of Volkswagen’s board of directors for sales, marketing and after-sales services. He adds: “ They also contribute significantly to the sustainable use of energy “.

With 77 kWh of lithium-ion batteries, it would be possible to power the house’s electrical appliances for more than two days, excluding electric heating, and as needed. The German manufacturer supports the connection with domestic photovoltaic production: ” Customers can decide for themselves when they want to take energy from the public grid or use self-produced electricity stored in the vehicle’s battery “.

Housing estate in Sweden

At the heart of the architecture now offered by Volkswagen is the integrated Home Energy Management System (HEMS) developed by HagerEnergy. Both partners found themselves in a pilot project in Sweden.

In Hudiksvall, a town of 15,000 inhabitants 300 kilometers north of Stockholm and nestled in a bay open to the Bothnian Sea, residents of the Stenberg housing estate will be able to benefit from this technology. After 350 years of existence, the land of the old eastern farmhouse has been rehabilitated into a residential area, where the roofs of cozy houses are covered with solar panels.

The use of electric cars as energy storage has been considered since the beginning of the program, where Volkswagen has been present since April 2021.

The HEMS system is presented as a dynamic extension of the domestic storage device, which ensures the main supply of energy to the house. The vehicle is operated for the purpose of regenerating this storage unit. After the operation is finished, the car stops transmitting power and the architecture goes into sleep mode. Its lithium-ion battery cannot be discharged below 20% to leave room for mobility in an emergency.

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