and 120 are turned off in this stage v 3 is equal to vdc 2 in this stage the output voltage is equal to a voltage at a center tap or a center point 126 of the multilevel converter the center point 126 refers to a connection point between two dc link capacitors in one embodiment where there are more than two dc link capacitors there may be more than one center point depending on number of dc link capacitors utilized in operation depending on a load current supplied by the multilevel converter to the power grid the center point voltage may not remain stable and hence voltage v 1 and v 2 may fluctuate from the value vdc 2 in one embodiment when an output voltage of the pv module is less than a threshold voltage the stability of the center point is controlled by the boost converter and when the output voltage of the pv module is higher than the threshold voltage the stability of the center point is controlled by the multi level converter in the third switching stage devices 114 and 116 are turned on whereas devices 118 and 120 are turned off this results in v 3 becoming zero as shown in a waveform 130 thus it can be seen that the.