This document discusses the performance of solar power plants. It begins with an introduction to solar photovoltaics and India's solar potential. The objectives are to estimate performance at different locations, assess module degradation, and recommend improvements. The methodology involves collecting output data from existing plants. Key factors that affect performance are discussed, such as radiation levels, temperature, losses, and module degradation over time. Performance is defined by the capacity utilization factor. The document recommends software to estimate power generation and concludes that solar will play an important role in energy supply as technology improves and costs decrease.