When recommending an MPP tracker, the most important taskis to choose and design a highly efficient converter, which is sup-posed to operate as the foremost part of the MPPT scheme [11].The DC to DC buck-boost zeta converter, as shown in Fig. 10, pro-vides a positive-polarity-regulated output voltage with respect tothe input voltage. The zeta converter is similar to the buck-boosttopology, which varies above and below the output voltage. Thisconverter needs two inductors and one capacitor in series, whichis sometimes called a flying capacitor [12]. The zeta converter is