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Close up view of some of the rectangular photovoltaic cells that comprised the power supply for Sunraycer, General Motors' entry for the Pentax World Solar Challenge, the first international solar-powered car race. The event began in Darwin, Northern Territories on November 1st, 1987 and finished in Adelaide, South Australia. An array of some 7,200 of these cells was arranged in a hood covering the front & back of the vehicle. Sunraycer was the eventual winner, taking 5 1/2 days to complete the 1,950 miles, traveling at an average speed of 41.6 miles per hour. (1987)