Many regions in the United States are experiencing rapid growth of solar. These existing or traditional systems are often designed and operated to generate and deliver the maximum amount of electricity in real time. Operational challenges are becoming evident in markets with high penetrations of traditional solar. However, utility-scale solar holds the potential if operated differently to address some of these issues on the electric grid by itself. The key to this transition is to understand the potential impacts of high penetrations of solar and identify solutions that ensure grid flexibility and reliability.