In this webinar, we will explore operations and maintenance for commercial photovoltaic (PV) and concentrating solar power (CSP). We will hear about grid-connected solar PV systems that are expected to proliferate over the coming decade and how higher penetration levels will put a premium on achieving optimal performance and reliability. A few utilities and private companies have taken on the challenge of optimization and have advanced the state of the art of operating, maintaining and monitoring PV systems. This O&M experience is producing new industry knowledge, procedures and guidelines. This presentation will describe current O&M practices and lessons learned distilled from experiences to date. Arizona Public Service will share their first-hand experience with operating and maintaining their Saguaro CSP parabolic trough demonstration plant.