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Solar radiation and temperature can influence their power and output voltage in electric cars with roofup PV panels (e.g. Vpv = 24–48 V DC). In such devices, the variable input tension (PV panel), increased with various acquisitions and deposited in high voltage battery packaging, must be separated from the full capacity. In addition, the charger can work in constant stress, steady pressure or steady control modes, based on battery charge status (Vbat = 220–400 V CC), from full discharging conditions up to the floating stress level. The application of the variable PV input voltage and different charging conditions poses an significant task to control the converter.