... FEATUREcompact structure, high-lift, noiseless, pollution-free;Complete electrical protecting controller device, against under-voltage, over-voltage, ... free, safe, reliable, energy-saving, efficient;Photovoltaic water pump, Permanent magnet brushless motor, Maximum power point tracking(MPPT) ... DC 4 inch 72V screw solar powered solar submersible pump water pumping system (4SPS4.2/120-D72/1300)