Photovoltaic solar energy has been widely accepted in recent times as a complement to traditional energy sources. DC-DC converters play an important role in transferring photovoltaic energy to a certain load. In applications where a high DC bus is required, it is necessary to use high voltage gain converters. This article presents an analysis based on switching functions of three high gain DC-DC converters including parasitic elements, these converters operate in continuous conduction mode, it is presented the switched model, the averaged model, and the static model. The results obtained during the analysis will be used to obtain the voltage stress on the switches, design high gain DC-DC converters to operate the photovoltaic module at its maximum power point, and raise the voltage from the module to 380 V by simulation on PSIM. The flyback converter presented an efficiency concerning output power and input power of 67.6%, cascaded boost converter of 71.1%, and Proposed-I converter of 84.8%.