Nissan Motor has developed a power supply system using electric vehicle batteries for use during blackouts.
The system is able to provide an average household with enough electricity to ride out a blackout for up to 2 days.
It connects batteries with distribution switch boards, to allow households to run air conditioners and other electric appliances in the event of a power outage.
Nissan aims to put the system into practical use by spring next year after completing tests.
The automaker says it was inspired by a stream of inquiries and requests from residents in areas where power shortages occurred due to the March 11th disaster, and stepped up efforts to develop the system.