That should save the National Park Service about $2,500 a year.
The system is being paid for by Arizona Public Service, which uses money voluntarily paid by its customers for renewable energy projects.
APS renewable energy leader Phil Smithers says the solar power system will help educate about 1 million visitors annually about solar power.
The Grand Canyon Visitors Center near Mather Point lookout is the first viewpoint most travelers encounter when driving to the Grand Canyon.