Nissan is working on developing systems that will allow EV users to feed electricity to their house or office while making sure the car is topped-off and ready to go when needed.

Recently, Nissan has carried out an early field test of a system that will allow companies to regulate their electricity bills using the batteries of Nissan Leafs used by their staff to commute to work.

Named by Nissan “Vehicle-To-Building”, the system allows up to six Nissan Leafs to be connected to a building’s power distribution board. Charging is phased during the day so at peak hours, when electricity is most expensive, the building draws power from the cars. When electricity is cheaper it flows the other way. Nissan said the system ensures the Nissan Leafs are fully charged by the end of the working day for their owners to drive home.

“Vehicle-to-Building”, explained Nissan, has been in use at the Nissan Advanced Technology Center in Atsugi City, Japan, since July. The facility benefited from a reduction of 25.6 kilowatt during peak summer periods by controlling the charging time of the EVs, with no impact on the workers’ daily commute, or their vehicles.

The results have led to approximately a 2.5-percent reduction of electrical power use during peak hours, a saving of nearly 500,000 Yen per year in electrical power cost, based on current Tokyo Electric Power Company’s rates.

Nissan added it plans to further test and refine the “Vehicle-To-Building” system, which is a development of the “Leaf-to-Home” system. “Leaf to Home” power units provide an uninterrupted flow of electricity stored in the high-capacity batteries onboard Nissan Leaf electric vehicles to residential homes.

Nissan stated the system will help encourage Nissan Leaf owners to charge their cars with electricity generated during the night, when demand is low, or sourced from solar panels. This assists in balancing energy needs by supplying electricity to homes/offices during daytime, when demand is highest.

Nissan also added the “Leaf-to-Home” system can also be used as backup power source in case of a power outage and/or shortages.