Panasonic Solar Roof Will Energize Toyota Prius Prime in Japan By Jeff Cobb Mar 01 2017 Share this Article Tweet High-tech roof could add 3.7 miles of range on a good day, but no plans yet to bring it to the States. Continue Reading... Filed under: Featured Articles Hatchbacks Hybrids Japanese Technology ToyotaTags: japan, plug-in hybrid, prius, prius prime, solar panels, solar roof, Toyota