z source network ac component of pv current can be ignored the peak peak voltage ripple on input capacitor u03b4v pv z source capacitor u03b4v zc and dc link after z source network u03b4v dc can be calculated by 6 based on 1 2 and 6 the relationship between voltages ripples u03b4v pv u03b4v zc u03b4v dc and c zc can be obtained in the fig7 fig7 shows that the u03b4v pv is the highest in order to achieve good voltage performance and maximum power point track mppt u03b4v pv is limited with 1 fig8 shows the relationship among c in c zc and u03b4v pv it can be seen that z source capacitors can handle the dff voltage ripple better than input capacitor there are four 100v gan devices in each zsim the power loss of each 250 w module is calculated around 10 watts so the maximum efficiency is around 96 at about half of rated output power when the input diode is used fig9 shows the power loss distribution of the switching and conduction loss of gan devices input diode loss the inductors and capacitors loss on z source network and the input capacitor loss since the proposed topology allows each module to switch at only a fraction of the.