Solar Prius

"The solar panels, which will be made by Kyocera, will likely only produce 1 kW of electricity, so the drivetrain will continue to be powered by the gas-electric hybrid motor while the air conditioning unit the primary beneficiary of the new power source. While this is definitely more of a symbolic gesture — and has even been characterized as such by an anonymous Toyota insider – it’s definitely good to see a company taking the lead in innovation and pushing the limits of what’s possible."
From ecotechdaily.com