It is not something new as such and it is that there are manufacturers that offer it in some markets and it has always been something that has caught our attention a lot and it is that to be clear, what is sought with this is use the electric car as a battery connected to our home network.
Incorporating the electric vehicle into the home network is the basis of bi-directional charging and offers great advantages especially when combined with a photovoltaic system. Surplus energy from the solar photovoltaic installation can be temporarily stored for use when necessary.
As the number of electric vehicles in circulation increases, so does the number of mobile energy storage units. This offers great potential as long as the storage capacity can be used intelligently.
Audi and the Hager Group have joined forces with the aim of researching and developing a solution that allows economic advantages and offers greater security in terms of supply, and this leads to bi-directional loading.
The idea is as simple as it is ingenious: the electric vehicle’s high-voltage battery is not only charged through the wallbox at home, but can also supply energy to the home as a decentralized means of energy storage.
If the customer has a photovoltaic installation or even an interesting time discrimination, the electric vehicle serves as a temporary storage medium for green or cheap energy. When the sun stops shining, the electric car can supply the energy stored in its battery to the home. Bi-directional charging at home, also known as V2H (Vehicle to Home), offers great potential for reducing electricity costs for the home owner and increases the stability of the electricity grid.
What seems simple in theory, in practice requires a high level of technical development and coordinated interaction between the different components in terms of infrastructure and the vehicle. An Audi e-tron with a charging technology very similar to that of the production model was used in the research project. In tests, the electric SUV was recharged using a direct current wallbox with a power of up to 12 kW, and a home storage unit with a capacity of 9 kWh.
Bidirectional charging is mainly aimed at those users who use their own photovoltaic system in their homes to benefit from optimized energy costs. The electric vehicle stores the excess energy generated by the photovoltaic system that is not used by the elements and installations that consume electrical energy in the home.