
344 Principles of Sustainable Energy Systems
© 2008 Taylor & Francis Group, LLC
Consumption
kWh
January 400
February 400
March 600
April 600
May 800
June 1000
July 1000
August 900
September 800
October 600
November 600
December 400
a. Design a system that will offset 100% of the home’s consumption.
b. Assuming $0.10/W electricity expense with a 5% annual inationary rate
increase, and a $7.50/W installed cost, what will the payback be for this system
after the rebate from the utility provider?
c. How do you wire the solar panel? Specically, how many cells would you need
and how would you wire them (series versus parallel) if the solar panel is t ...