Pinnacle West Capital Corp is a key player in the energy sector, primarily serving Arizona with both retail and wholesale electric services. It harnesses a diverse mix of energy sources including coal, nuclear, gas, oil, and solar to generate electricity. The company is responsible for the entire electricity journey, from generation through transmission, which involves both overhead and underground lines, to distribution. Additionally, it manages substations and energy storage facilities. Founded in 1985, its headquarters are in Phoenix, Arizona.