This book explains the science of photovoltaics (PV) in a way that most people can understand, using the curriculum which reflects the core modules of the NABCEP Associate Exam. Whether or not you are taking the NABCEP Associate Exam, learning the material covered in this book is the best investment you can make insuring your place and moving up in the solar industry. Providing complete coverage of the NABCEP syllabus in easily accessible chapters, this book addresses all of the core objectives required to pass the exam, including the ten main skill sets: PV Markets and Applications Safety Basics Electricity Basics Solar Energy Fundamentals PV Module Fundamentals System Components PV System Sizing Principles PV System Electrical Design PV System Mechanical Design Performance Analysis, Maintenance and Troubleshooting. You will learn the importance of surveying a site and how to carry out a survey, how to use the tools that determine shading and annual production, and the necessity of safety on site. This guide also includes technical math and equations that are suitable and understandable to those without engineering degrees, but are necessary in understanding the principles of solar PV. This new edition of Sean White’s highly successful study guide has been updated throughout and reflects recent changes in the industry.