Electricity from an e-car

A large high-voltage battery like the one in the Audi e-tron stores up to 95 kWh of energy. Theoretically, this is enough for operating various appliances around the clock

On days when the wind blows endlessly, ...

... and the sun just shines from the sky, ...

... large amounts of green energy often remain unused due to a lack of storage.

Electric cars could be real game changers here.

More precisely, the powerful batteries.

For example, to bridge phases of low electricity generation from wind and solar energy.

Connected to a house network, an electric car could theoretically step in as a power supplier.

This is made possible by the so-called Vehicle to Home (V2H) charging flow, from the electric car to the domestic power grid.

As mobile, decentralized energy depots, e-cars could also contribute to grid stability. Technical term: Vehicle-to-grid (V2G).

A lot can be operated and charged in a household with the energy coming from a large 95 kWh battery.

95 times turning on a convection for 30 minutes

9,500 times charging a smartphone

5,700 minutes operating a 1,000-watt electric water kettle

31 days operating a refrigerator

40 hours vacuum cleaning

544 hours running a washing machine

Electricity from an e-car
The e-car as an energy supplier

Blaring TV sets, humming dishwashers, glowing toasters: none of these would be possible without electric energy. In the future, power might be supplied directly by our own electric cars, provided that they’re not just plugged into regular outlets but integrated into the electrical systems of our homes via wallbox chargers.

The technical term for this is bi-directional charging or Vehicle to Home (V2H). The battery of an electric car as a smart and decentralized storage medium is a really hot topic in the energy transition context. The reason is that increasing registrations of electric cars logically increase the number of mobile storage systems as well. Audi and the Hager Group are currently pursuing this vision in an innovative research project. V2H offers major advantages particularly in interaction with domestic photovoltaic systems. Surplus power can be fed into intermediate storage and supplied as needed, for instance at night when solar collectors don’t produce any electricity. For example, the 95-kWh battery of an Audi e-tron would be able to self-sufficiently supply a one-family home with green electricity for roughly one week.

Today the utopia of the morning is the reality of the afternoon

Truman Capote, American novelist