Here at the Tokyo show, many car makers have moved onto the next stage of what they hope might be the Electric Vehicle revolution.

A number of domestic makers are now pushing the idea that you could use your electric car to power your house, or at least some of the equipment inside it.

Nissan had a small model showing how connecting the Leaf could be connected to a domestic power supply and Mitsubishi had constructed a full-size, mock-up, Tokyo apartment showing a MiEV powering the lamp and charging the iPad.

Aside from keeping the essentials running in the event of a power cut, the proposition is that an EV could be charged from, say, solar panels during the day, when it is parked up. The car could then be driven home and have enough free juice on board, not only to make the commute back to the office, but also power-up devices at the driver’s home.