User Guide# Package Overview Introduction User extensions Getting support How do I contribute? Credits Installation If you don’t have Python Install standard release Install as an editable library Compatibility NREL SPA algorithm References Intro Tutorial Modeling paradigms PVSystem Design philosophy PVSystem and Arrays PVSystem attributes ModelChain A simple ModelChain example Defining a ModelChain Demystifying ModelChain internals User-defined models Time and time zones General functionality pvlib-specific functionality Clear sky Location Ineichen and Perez Simplified Solis Detect Clearsky References Bifacial modeling pvfactors Infinite Sheds References Weather data Types of weather data sources Usage References Single Diode Equation Lambert W-Function Bishop’s Algorithm References Nomenclature Frequently Asked Questions General Questions Usage Questions