A DC-DC converter is commonly placed between the SPV array and VSI (voltage source inverter) fed BLDC motorpump in order to track the optimum operating point of the SPV array using a maximum power point tracking (MPPT) technique [20-25]. Non-isolated DC–DC buck, boost, buck– boost, Cuk and SEPIC (Single Ended Primary Inductor Converter) converters used for MPPT in SPV applications are reviewed and compared in [26] and concluded that a buckboost converter is best suited for the SPV system. On the other hand, buck-boost and Cuk converters have poor switch utilization (maximum switch utilization of 0.25 is realized at duty cycle = 0.5), high stress on power devices and inverting output voltage [27]. These converters increase complexity due to the associated circuit for negative voltage feedback sensing which also slows down the system response [28]. Similarly, the power device of SEPIC converter also suffers from high voltage stress. Besides that, the Cuk and SEPIC converters have the high number of components, which contribute to their main drawback. A DC-DC boost converter is used in [19, 29-30] as an intermediate power converter to improve energy conversion efficiency of the BLDC motor driven SPV array fed water pumping system. Having known that the boost converter always increases the voltage level at its output and hence the soft starting of BLDC motor with this converter is not possible, so it is not recommended. A DC-DC buck converter is not used so far in SPV array fed water pumping but using this converter calls for a large and expensive input capacitor to get a ripple free input current [26].