This thesis investigates the possibility of coupling the photovoltaic (PV) technology with an innovative desalination technique based on passive multi-stage distillation, which is driven by low-temperature heat. The term "passive" distillation is here intended as a process that relies only on evaporation and capillarity without requiring any mechanical or electrical devices. The aim is to demonstrate the possibility to cogenerate both electricity (from the PV module) and distilled water (from the passive distiller). Instead of exposing the distiller to direct sunlight, the necessary heat is recovered from the back side of the PV module. Therefore, other than the cogeneration of electricity and distilled water, a synergic effect can be eventually achieved, since a gain in efficiency of the PV is sought due to the reduction of the panel’s temperature.