Under insolation conditions of 500 W/m^2 (direct sunlight), and 10 %solar cell efficiency (defined as the ratio of electrical output power to incident solar power), calculate the area required for a photovoltaic array capable of running a vehicle at 20 hp.
20 HP=15000W
15000W/.1 for the efficiency is 150,000W
150,000W/500 m^2 is 300 m^2