They can contribute to the electricity network.
Because electric vehicles, or EVs, run on batteries, they could theoretically store energy and feed it back into the home from the garage, for instance, or even provide electricity to the community if it was connected to a “smart grid.”
Yokohama is one of four cities selected by Japan’s Ministry of Economy, Trade and Industry to test that “Smart City” concept, bringing together power companies, electronics firms and others. Nissan Motor Co is providing the electric cars, as well as ideas for where best to place charging spots around town.
In the city’s vision, homes and businesses will be connected to a smart grid that combines electricity and telecommunications to make the most efficient use of energy across a community.
Solar panels will be installed on rooftops, and instead of having a separate storage unit, electric cars would capture that energy. By doing so, the car would not only run on clean energy, but could also feed electricity back to power household appliances when demand arises, the city says.
The electric car thus can be both a source of supply and demand on a smart grid.