Hydrogen fuel-cell vehicles work like small generators -- the car's onboard fuel cell converts compressed hydrogen gas into electricity, and the only byproduct is water. It's not surprising, then, that these rolling power stations could be used for solutions above and beyond personal transportation. Toyota wants to be at the forefront of that movement, and its FCV Plus concept aims to make that happen.

The FCV Plus, which debuted at this week's Tokyo Motor Show, is still just a concept, but it reflects Toyota's ever-increasing discourse on how hydrogen will be the future of both propulsion and power. Thus, the concept was built around the idea of a society that relies on hydrogen for its energy needs, whether at home or on the road.

Not only does the FCV Plus operate using a built-in hydrogen tank, it can be hooked up to a larger, external tank -- at that point, the car could become a generator for your home or office, supplying power in lieu of (or in complement to) a more traditional grid. If your car is sitting around unused, and your house is already good on power, it can send any excess juice back into the infrastructure for use elsewhere.

http://www.cnet.com/news/toyotas-fcv-plus-hydrogen-concept/