The system delivers about 165 watts of power per hour to an added battery , which helps powers the electric motor , Johanson said . The 2010 Toyota Prius , due this spring , will have an optional solar panel on its roof . The panel will power a cooling system without help from the engine . One company also makes a roof-mounted solar panel for current Prius models . Comment:
The 2010 Toyota Prius , due this spring , will have an optional solar panel on its roof . The panel will power a cooling system without help from the engine . One company also makes a roof-mounted solar panel for current Prius models . Comment: