As of: March 18, 2024, 6:00 a.m
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The electric car should become an electricity trading partner.
Owners could benefit financially from this - but standards are still missing.
After some time on the rise, e-mobility is currently struggling in Germany.
Electric car sales also weakened in February and car dealers' forecast for electric car sales in 2024 does not necessarily look rosy.
There is also positive news for everyone who already owns an electric car or wants to buy one: around 1,000 additional fast charging points are to be built along the motorways by 2026.
And: Bidirectional charging could open up a new business model for e-car drivers and network operators in the foreseeable future.
So far, buffer storage and the refeeding of traction current into the grid have not really taken off in Germany.
A roadmap that has now been published by the Advisory Board of the National Charging Infrastructure Control Center is intended to change this quickly.
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Bidirectional charging: Current systems are still very expensive and not very flexible
The specific recommendations for action concern the most important variants of bidirectional charging, from supplying the household via the electric car battery (“Vehicle-to-Home”, V2H) to feeding into the public power grid (“Vehicle-to-grid”, V2G).
For the first-mentioned, technically less demanding case, the advisory board expects the first commercial applications to be available next year.
It will take a little longer until V2G technology is truly marketable.
Individual car manufacturers such as Volkswagen already offer corresponding systems, but these are extremely expensive and inflexible.
According to the roadmap, there could be a ramp-up of interoperable and standardized solutions for V2H and V2G from 2028 onwards.
However, only if the relevant technical and regulatory standards have been established by then.
Not only do you need to fill up with electricity, but also feed it back into the grid: bidirectional charging is intended to open up a new business model for electric car owners.
(Symbolic image) © Pond5 Images/Imago
What requirements are needed for bidirectional charging?
For bidirectional charging in private households, a technically suitable electric car, a special wallbox and usually another battery storage unit are required.
The integration of a photovoltaic system is also possible.
Currently, the costs for the technology, even without a vehicle, amount to a low five-figure amount.
In contrast, there are possible annual revenues from electricity trading of a few hundred euros.
In order to have an attractive revenue model, Wallbox and Co. probably have to become cheaper.
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The advisory board also sees easy-to-use “plug-and-play” solutions as a desirable goal from the customer’s perspective.
This requires standards in the areas of electrical safety, grid connection, digital communication and measurement and control applications.
Legally, there is still a lack of overarching regulations, such as fees, levies and levies that can play a role in electricity storage and energy recovery.
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Electricity trading through bidirectional charging is intended to make the power grid more stable
In general, the authors emphasize the importance of bidirectional charging for electromobility.
Bidirectional charging can help consumers reduce their own electricity costs by selling electricity purchased and stored during times of abundance at a profit when demand is high.
This electricity trading also makes the power grid more stable because it can absorb load peaks.
According to the federal government's plans, up to 15 million electric cars with a storage capacity of several hundred gigawatt hours should be registered on German roads by 2030.
According to a study by the Munich Energy Research Center, around a third of this should be used for bidirectional charging.
(Holger Holzer/SP-X)