A pan tile for use in a roofing system and assembly, wherein a plurality of such pan tiles are disposed in confronting, supported relation on an underlying roof support and in underlying, at least partially supporting relation to plurality of overlapping, exteriorly exposed roof tiles, wherein the pan tiles may be structured individually or integrally in longitudinal arrays. The pan tile includes a planar base and two oppositely disposed planar side segments extending outwardly from opposite peripheries of said base at a common, preferred obtuse angle. Leading and trailing ends of pan tiles have a greater and lesser transverse dimension respectively, wherein the side segments or oriented in a converging configuration extending from the leading end to the trailing end of the pan tile. Solar energy systems may also be incorporated in the individual pan tiles and/or the longitudinal arrays thereof. The roofing assembly may further include a heat dissipating assembly and/or a stabilizing assembly.