Understanding and paying attention to PV commissioning is important to the industry. If the PV industry is to continue to expand and become a significant part of the US energy portfolio, short- and long-term system performance is critical to maintaining public confidence and goodwill. Already, many interested parties are making concerted efforts to maintain the quality control of installed systems. Power Purchase Agreement (PPA) providers, for example, must protect their investments; manufacturers want to see the PV market grow; and legislators and rebate administrators need to encourage responsible industry growth. Integrators, who play such a large role in the story, must do their part to ensure the safety, quality and performance of installed PV systems.