V2X: The electric car donates electricity

While the often freshly baked owners of electric cars are still thinking about where your vehicle will get the required electricity from – Wallbox for home? Charging stations on the go? – other considerations are already in the opposite direction: the e-mobile should not only recharge your batteries, but also be able to donate.

The central terms are bidirectional charging and V2X, which stands for Vehicle to Everything and split into different areas of application: V2L (Vehicle to Load) believes that the electric car can supply other electrical consumers such as e-bikes or notebooks. V2H (Vehicle to Home) already thinks larger and provides for the path of the current from the vehicle to the house electricity network. However, V2G (Vehicle to Grid) is considered to be the supreme discipline: Here the energy stored in the E-Mobil is fed back into the general power grid.

service life used sensibly

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The idea has charm insofar as the technology could play a central role in the energy transition. Because solar and wind energy are not always available to the same extent. But the power grid must be balanced. It is currently responsible for conventional power plants to cushion fluctuations, which of course is associated with unwanted emissions. Instead, thousands, possibly millions of electric cars, could serve as a buffer storage for eco-stream in the future. By the way, they would use their service life, which – as with other vehicles – mostly includes 90 percent of the day.

electricity donation remunerated

Porsche still sees a “win-win situation” in other ways: the owners of the electric cars could be financially paid for the electricity donation. And if electric vehicles contribute to the expansion of regenerative energies, it would generally “further increase the acceptance of e-mobility”, as Lutz Meschke says, deputy chairman and board member Finance/IT at the Zuffenhausen sports car manufacturer.

Bidirectional shop: The Hyundai Ioniq 5 is also able to donate electricity – for example to a pedelec. Hyundai

The bidirectional store is currently only a few electric cars. The so-called permissible loading protocol for the back dishes in the power grid is currently only available for the CHADEMO fast charging connection, which, however, is considered a discharge model in Europe and the USA. Even the Japanese Chademo -Verfechter such as Nissan or Mitsubishi are in the process of switching to the CCS standard, which – apart from supplying the power grid – is generally not yet controlled. Exceptions are the Hyundai Ioniq 5 as well as its sister models Kia EV6 and Genesis GV60, with the help of an adapter you can charge external devices with up to 3.7 kW and also make “empty” other electricity fit again. Minivan Sion of the Sono Motors start-up, announced for the second half of 2023, is also to be upgraded, VW is also on the subject.

If Mercedes is still holding back and the electrical limousine EQE only equips with a bidirectional charging function on the Japanese market – which is already further in this regard, this also explains that the regulatory requirements for the V2G application do not yet exist in Germany – Traction batteries would first have to be released to the power grid for the energy donation.

V2X: Porsche, like e -cars – here a Taycan – can feed energy back to the public power grid during their service life. Porsche

pilot projects started

Some pilot projects document that car manufacturers still see future prospects in technology. Hyundai, for example, is testing the V2X technology on the one hand in Berlin, modified Ioniq-5 models there share its electricity with a house network, on the other hand, the Dutch city of Utrecht has been equipped with 25 copies of the electricity, which are initially used in car sharing and in perspective on public, from the mobility provider “We Drive Solar” developed charging stations to the general network. At Porsche, tests in cooperation with the transmission system operator TransnetBW and the advisory company Intelligent Energy Services (E2S), five Taycan models have been connected to the power grid in the home environment and – under laboratory conditions. And BMW is involved in the research project “Bidirectional Laden Management – BDL”, whose sponsor the German Aerospace Center (DLR) acts.