The paper said Toyota would equip solar panels on the roof of the high-end version of the Prius when it redesigns the gasoline-electric hybrid car early next year, and the power generated by the system would be used for the air conditioning.

Toyota plans to use solar panels made by Kyocera Corp <6971.T>, the Nikkei said.

A Toyota spokeswoman could not immediately confirm the report.

The Prius, the world's first mass-produced gasoline-electric hybrid car, first went on sale in Japan in late 1997 and in other markets in 2000, and its cumulative sales have topped 1 million units worldwide.

Toyota remodeled the Prius with an improved hybrid system in 2003 and is expected to launch a third-generation version by next year.

(Reporting by Sachi Izumi; Editing by Chris Gallagher)