Each solar pump has its own merits and demerits. While a DC solar pump is generally used in low power capacity (around 5kW), one should consider other factors also while choosing a solar pump:

Efficiency:
A DC solar pump is more efficient as it gives maximum output with fewer solar panels. AC solar pumps need more solar panels as the electricity has to be converted into AC for utilization. As a result, the efficiency of the system is reduced in the latter’s case.
Noise:
DC pumps are quite silent because of the BLDC motor technology used in their engineering. It helps to reduce mechanical noise significantly. On the other hand, AC solar pumps are rather obsolete and use the old motor technology. It might also cause it to become noisy over time.
Cost:
A DC solar pump is difficult to maintain. It requires specialized personnel to service it. This scope of limited service and complicated engineering causes a significant increase in its cost. AC solar pumps can be easily handled in case of emergencies.
Service life:
DC solar pumps have motors with copper coils in them. Copper is seen to be more durable, thereby increasing the life of the pumping system. AC solar pumps, on the other hand, have solar motor coils made up of aluminum, making them prone to deterioration. Consequently, they require service more often as compared to DC pumps.

Assessing the above parameters, we can conclude that a DC pump is a better choice when it comes to efficient solar pumping systems.

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