DC solar submersible pump

Solar pump system is the opto-mechatronics system developed fast in these years, which make use of the electric generated by the solar, after the max efficiency point tracking and inventing, controlling,  to drive the DC permanent magnetic machine or high efficient async electric machine whose sensorless and brushless then to drive the high efficient pump to get the water from the depth of the surface for drinking or irrigating. especially in the remote place lack of electricity and water, solar pump is the best way to supply water without question, using   inexhaustible solar energy everywhere to make economic and stable water supplying.