physics
posted by tina .
I have no idea how to do this problem:
Design an array of individual solar cells that woulproduce 120 volts DC. About how large an area of solar cells would be needed to produce 2 kWe of/ output power at noon on a clear day

http://www.grc.nasa.gov/WWW/K12/Numbers/Math/Mathematical_Thinking/sun12.htm
Is a start.
The actual connections, and voltage regulators, are a little complex.