Thoroughly updated, the third edition of this bestseller presents a comprehensive engineering basis for photovoltaic (PV) system design and presents the "what, why, and how" associated with electrical, mechanical, economic, and aesthetic aspects of PV system design. Nearly all examples have been updated and are significantly more detailed than prior editions. The chapters have been rearranged to place an earlier focus on design, and the latest technology is reflected in design examples and homework problems. This edition includes additional material on incentives, structural design and the use of ASCE 7 and added emphasis on array layout, wind loading, and shade analysis.