Professor Andy Frank, Director of the UC Davis Hybrid Vehicle Research Center, has a plan to power more than just our cars. In his vision, plug-in hybrid vehicles can be used as mobile batteries, contributing solar power to the grid, and helping to "load balance" the demand. Roofs built over our parking lots contain solar panels that charge the cars' batteries in daytime. At home, the same batteries can help power ahouse, or feed energy back to the grid. The result: fewer power plants. Episode 107.