Improved photovoltaic (PV) assemblies for converting solar radiation to electrical energy and methods of installation thereof are disclosed herein. PV arrays comprising a plurality PV modules are also described herein. A PV assembly can comprise at least one PV module having a front side and a back side opposite the front side. A PV module can comprise a plurality of solar cells encapsulated within a PV laminate. In some embodiments, a PV module includes a frame at least partially surrounding the PV laminate. In such embodiments, frame can comprise an outer surface feature. The PV assembly can further comprise at least one spacing device positioned between adjacent PV modules. A spacing device can comprise a spacer body having a predetermined width for defining a predetermined distance or gap between adjacent PV modules.