Abstract This chapter is intended to provide technical information about different items related to off-grid PV systems: from solutions (Pico PV, PV pump, residential, industrial and services), including PV hybrid systems (PV-diesel based on batteries), to analysis of the power converters implemented in those systems. In addition, other items are analysed, such as the design of stand-alone PV systems and their influence on application and user behaviour, measuring and assessing performance, case studies of stand-alone PV applications for rural electrification and international standardization related to off-grid PV systems.