1. A utility-connected residential PV system is the most common configuration where various electrical components control, condition, and distribute PV power to DC and/or AC loads. 2. Distributed generation systems produce electricity close to where it is used unlike electric utilities which produce electricity at power plants for distribution through power lines and transformers to consumers. 3. Nearly every satellite and spacecraft since 1958 has relied on PV systems for power generation while portable PV systems tend to be small and intended for specific loads and remote areas without utility power are well suited for PV technology.